/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=DEEPEST --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/array-fpi/s3lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:42:15,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:42:15,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:42:15,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:42:15,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:42:15,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:42:15,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:42:15,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:42:15,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:42:15,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:42:15,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:42:15,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:42:15,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:42:15,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:42:15,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:42:15,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:42:15,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:42:15,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:42:15,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:42:15,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:42:15,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:42:15,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:42:15,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:42:15,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:42:15,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:42:15,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:42:15,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:42:15,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:42:15,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:42:15,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:42:15,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:42:15,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:42:15,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:42:15,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:42:15,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:42:15,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:42:15,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:42:15,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:42:15,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:42:15,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:42:15,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:42:15,728 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 14:42:15,782 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:42:15,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:42:15,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:42:15,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:42:15,788 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:42:15,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:42:15,789 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:42:15,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:42:15,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:42:15,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:42:15,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:42:15,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:42:15,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:42:15,791 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:42:15,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:42:15,792 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:42:15,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:42:15,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:42:15,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:42:15,792 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:42:15,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:42:15,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:42:15,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:42:15,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:42:15,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:42:15,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:42:15,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:42:15,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:42:15,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:42:15,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:42:16,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:42:16,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:42:16,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:42:16,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:42:16,211 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:42:16,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3lif.c [2020-10-27 14:42:16,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fa4195f1/59638bf7e385485da7a621f9ff52dc6e/FLAGbbc38b3ac [2020-10-27 14:42:16,888 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:42:16,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s3lif.c [2020-10-27 14:42:16,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fa4195f1/59638bf7e385485da7a621f9ff52dc6e/FLAGbbc38b3ac [2020-10-27 14:42:17,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fa4195f1/59638bf7e385485da7a621f9ff52dc6e [2020-10-27 14:42:17,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:42:17,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:42:17,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:42:17,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:42:17,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:42:17,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b056ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17, skipping insertion in model container [2020-10-27 14:42:17,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:42:17,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:42:17,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:42:17,588 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:42:17,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:42:17,636 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:42:17,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17 WrapperNode [2020-10-27 14:42:17,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:42:17,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:42:17,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:42:17,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:42:17,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (1/1) ... [2020-10-27 14:42:17,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:42:17,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:42:17,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:42:17,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:42:17,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (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 14:42:17,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:42:17,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:42:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:42:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:42:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:42:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:42:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:42:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:42:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:42:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:42:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:42:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:42:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:42:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:42:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:42:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:42:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:42:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:42:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:42:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:42:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:42:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:42:18,348 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:42:18,348 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:42:18,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:42:18 BoogieIcfgContainer [2020-10-27 14:42:18,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:42:18,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:42:18,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:42:18,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:42:18,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:42:17" (1/3) ... [2020-10-27 14:42:18,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5096c117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:42:18, skipping insertion in model container [2020-10-27 14:42:18,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:17" (2/3) ... [2020-10-27 14:42:18,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5096c117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:42:18, skipping insertion in model container [2020-10-27 14:42:18,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:42:18" (3/3) ... [2020-10-27 14:42:18,389 INFO L111 eAbstractionObserver]: Analyzing ICFG s3lif.c [2020-10-27 14:42:18,402 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:42:18,408 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:42:18,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:42:18,452 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:42:18,452 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:42:18,452 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:42:18,453 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:42:18,453 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:42:18,453 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:42:18,453 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:42:18,453 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:42:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-27 14:42:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:42:18,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:18,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:18,482 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:18,489 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-27 14:42:18,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:18,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832461838] [2020-10-27 14:42:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:18,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:19,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:19,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:42:19,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:42:19,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-27 14:42:19,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:42:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:19,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:42:19,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:19,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:19,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:19,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:19,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 14:42:19,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:19,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:19,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:19,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:42:19,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:19,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:19,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:19,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:19,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:19,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:42:19,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:19,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:42:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:19,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:42:19,802 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 14:42:19,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832461838] [2020-10-27 14:42:19,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:42:19,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:42:19,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220894486] [2020-10-27 14:42:19,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:42:19,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:42:19,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:42:19,833 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-27 14:42:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:19,978 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 14:42:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:42:19,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-27 14:42:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:19,988 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:42:19,989 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:42:19,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:42:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:42:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:42:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:42:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 14:42:20,038 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-27 14:42:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:20,039 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 14:42:20,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:42:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 14:42:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:42:20,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:20,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:20,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:42:20,041 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-27 14:42:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:20,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565268241] [2020-10-27 14:42:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:20,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:20,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:20,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:20,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:42:20,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:42:20,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-27 14:42:20,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:20,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:42:20,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:42:20,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:42:20,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:20,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:20,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:20,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:20,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:20,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:20,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:42:20,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:20,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:20,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:20,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:20,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:20,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:20,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:20,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:20,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:20,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:20,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:42:20,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:42:20,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:20,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:42:20,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:42:20,619 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 14:42:20,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565268241] [2020-10-27 14:42:20,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:42:20,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:42:20,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526426267] [2020-10-27 14:42:20,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:42:20,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:42:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:42:20,629 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-27 14:42:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:20,817 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-27 14:42:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:42:20,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:42:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:20,819 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:42:20,819 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:42:20,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:42:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:42:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 14:42:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:42:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 14:42:20,830 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-27 14:42:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:20,830 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 14:42:20,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:42:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 14:42:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:42:20,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:20,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:20,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:42:20,832 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-27 14:42:20,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:20,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728719064] [2020-10-27 14:42:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:20,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:21,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:21,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:21,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:22,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:24,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:24,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:42:24,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:42:24,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3475 [2020-10-27 14:42:24,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:24,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:42:24,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:24,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:42:24,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:24,758 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-27 14:42:25,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:25,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:25,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:25,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:25,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:25,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:25,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:25,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:25,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:25,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:25,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:25,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:25,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:25,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:25,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:25,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728719064] [2020-10-27 14:42:25,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:25,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:42:25,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984064881] [2020-10-27 14:42:25,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:42:25,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:42:25,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:42:25,376 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 16 states. [2020-10-27 14:42:26,281 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-27 14:42:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:27,045 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-27 14:42:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:42:27,051 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-27 14:42:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:27,052 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:42:27,053 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:42:27,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:42:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:42:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-27 14:42:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:42:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 14:42:27,074 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-27 14:42:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:27,074 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 14:42:27,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:42:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 14:42:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:42:27,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:27,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:27,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:42:27,081 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:27,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-27 14:42:27,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:27,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313640667] [2020-10-27 14:42:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:27,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:27,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:27,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:27,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:28,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:28,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:42:28,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:42:28,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1374 [2020-10-27 14:42:28,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:42:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:42:28,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:42:28,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:42:28,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:28,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:28,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:28,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:28,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:28,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:28,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:28,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:28,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:28,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:28,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:28,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:28,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:28,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:28,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:28,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:28,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:42:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:28,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313640667] [2020-10-27 14:42:28,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:28,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:42:28,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707933064] [2020-10-27 14:42:28,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:42:28,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:28,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:42:28,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:42:28,735 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-27 14:42:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:29,282 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-27 14:42:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:42:29,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:42:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:29,285 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:42:29,285 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:42:29,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:42:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:42:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-10-27 14:42:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:42:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 14:42:29,296 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2020-10-27 14:42:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:29,297 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 14:42:29,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:42:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 14:42:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:42:29,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:29,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:29,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:42:29,299 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-27 14:42:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:29,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623351834] [2020-10-27 14:42:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:29,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:29,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:30,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:42:30,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:42:30,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-27 14:42:30,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:30,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:42:30,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:42:30,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:42:30,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:30,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:30,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:30,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:30,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:30,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:30,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:30,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:30,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:30,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:30,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:30,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:30,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:30,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:42:30,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:30,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:30,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:30,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:30,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:42:30,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623351834] [2020-10-27 14:42:30,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:30,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:42:30,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277325784] [2020-10-27 14:42:30,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:42:30,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:30,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:42:30,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:42:30,194 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-10-27 14:42:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:30,503 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2020-10-27 14:42:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:42:30,503 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 14:42:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:30,505 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:42:30,505 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:42:30,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:42:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:42:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-27 14:42:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:42:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-27 14:42:30,518 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-27 14:42:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:30,518 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-27 14:42:30,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:42:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-27 14:42:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:42:30,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:30,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:30,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:42:30,520 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash 234001266, now seen corresponding path program 1 times [2020-10-27 14:42:30,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:30,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382732856] [2020-10-27 14:42:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:30,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:31,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:31,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:32,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:34,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:34,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:42:34,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:42:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4389 [2020-10-27 14:42:34,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:34,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:42:34,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:42:34,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:42:34,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:35,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:35,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:35,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:35,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:42:35,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:35,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:35,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:35,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:35,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:35,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:35,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:35,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:35,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:35,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:35,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:35,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:35,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:35,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:35,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:42:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:42:35,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382732856] [2020-10-27 14:42:35,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:35,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:42:35,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569773454] [2020-10-27 14:42:35,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:42:35,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:35,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:42:35,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:42:35,056 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 8 states. [2020-10-27 14:42:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:35,340 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-27 14:42:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:42:35,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 14:42:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:35,344 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:42:35,344 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:42:35,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:42:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:42:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 14:42:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:42:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:42:35,358 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-27 14:42:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:35,358 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:42:35,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:42:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:42:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:42:35,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:35,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:35,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:42:35,361 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:35,362 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 3 times [2020-10-27 14:42:35,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:35,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200887429] [2020-10-27 14:42:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:36,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:36,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:37,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:37,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:38,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:38,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:39,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:40,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:40,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:40,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:42:40,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:42:40,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:42:40,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:40,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:42:40,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:42:40,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:42:40,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:40,914 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 14:42:41,052 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-27 14:42:42,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:42,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:42,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:42,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:42,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:42,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:42:42,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:42,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:42,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:42,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:42,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:42,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:42,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:42,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:42,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:42,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:42,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:42:42,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:42,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:42,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:42,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:42,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:42:42,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200887429] [2020-10-27 14:42:42,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:42,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:42:42,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922619899] [2020-10-27 14:42:42,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:42:42,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:42,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:42:42,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:42:42,089 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 21 states. [2020-10-27 14:42:42,859 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-27 14:42:43,777 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-27 14:42:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:44,428 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-27 14:42:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:42:44,428 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-10-27 14:42:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:44,430 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:42:44,431 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:42:44,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:42:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:42:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-27 14:42:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:42:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 14:42:44,442 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-27 14:42:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:44,442 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 14:42:44,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:42:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 14:42:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:42:44,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:44,443 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:44,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:42:44,444 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 2 times [2020-10-27 14:42:44,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:44,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707354732] [2020-10-27 14:42:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:44,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:44,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:45,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:45,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:46,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:47,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:48,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:48,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:42:48,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:42:48,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3842 [2020-10-27 14:42:48,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:48,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:42:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:42:48,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:42:48,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:42:48,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:48,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:48,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:48,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:48,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:48,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:48,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:48,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:48,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:48,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:48,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:48,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:48,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:48,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:48,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:48,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:42:48,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707354732] [2020-10-27 14:42:48,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:48,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:42:48,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58410622] [2020-10-27 14:42:48,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:42:48,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:48,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:42:48,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:42:48,579 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 13 states. [2020-10-27 14:42:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:49,456 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-27 14:42:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:42:49,457 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 14:42:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:49,460 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:42:49,460 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:42:49,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:42:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:42:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-27 14:42:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:42:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-27 14:42:49,483 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 38 [2020-10-27 14:42:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:49,484 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-27 14:42:49,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:42:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-27 14:42:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:42:49,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:49,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:49,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:42:49,485 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 3 times [2020-10-27 14:42:49,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:49,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643170969] [2020-10-27 14:42:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:49,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:49,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:49,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:49,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:50,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:50,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:52,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:52,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:42:52,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:42:52,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3429 [2020-10-27 14:42:52,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:52,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:42:52,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:42:52,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:42:52,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:53,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:53,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:53,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:53,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:53,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:42:53,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:53,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:53,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:53,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:53,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:53,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:53,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:42:53,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:42:53,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643170969] [2020-10-27 14:42:53,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:53,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:42:53,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203411833] [2020-10-27 14:42:53,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:42:53,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:53,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:42:53,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:42:53,200 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 12 states. [2020-10-27 14:42:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:53,763 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-27 14:42:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:42:53,764 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 14:42:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:53,766 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:42:53,766 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:42:53,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:42:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:42:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 14:42:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:42:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-27 14:42:53,782 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 38 [2020-10-27 14:42:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:53,782 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-27 14:42:53,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:42:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-27 14:42:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:42:53,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:53,783 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:53,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:42:53,784 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 4 times [2020-10-27 14:42:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:53,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430134544] [2020-10-27 14:42:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:53,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:53,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:54,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:54,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:42:54,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:42:54,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-27 14:42:54,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:42:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:42:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:42:54,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:54,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:42:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:54,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:54,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:54,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:42:54,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:54,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:42:54,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:54,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:54,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:54,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:54,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:54,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:42:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:54,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:54,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:42:54,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:42:54,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:42:54,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:42:54,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:42:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:42:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:42:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:42:54,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:42:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:42:54,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430134544] [2020-10-27 14:42:54,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:42:54,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:42:54,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32063114] [2020-10-27 14:42:54,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:42:54,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:42:54,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:42:54,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:42:54,973 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-10-27 14:42:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:42:55,331 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-10-27 14:42:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:42:55,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 14:42:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:42:55,333 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:42:55,333 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:42:55,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:42:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:42:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-27 14:42:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:42:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-27 14:42:55,363 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 40 [2020-10-27 14:42:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:42:55,363 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-27 14:42:55,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:42:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-27 14:42:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:42:55,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:42:55,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:42:55,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:42:55,367 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:42:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:42:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 5 times [2020-10-27 14:42:55,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:42:55,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929710470] [2020-10-27 14:42:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:42:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:42:55,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:55,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:56,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:59,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:42:59,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:00,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:43:00,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 14:43:00,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:43:00,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:43:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:43:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:43:00,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:00,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:00,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:00,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:00,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:00,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:43:00,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:00,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:00,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:00,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:00,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:00,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:00,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:00,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:00,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:00,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:43:00,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929710470] [2020-10-27 14:43:00,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:00,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:43:00,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48186746] [2020-10-27 14:43:00,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:43:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:43:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:43:00,633 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 14 states. [2020-10-27 14:43:01,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:01,317 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-27 14:43:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:43:01,317 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-27 14:43:01,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:01,318 INFO L225 Difference]: With dead ends: 98 [2020-10-27 14:43:01,319 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:43:01,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:43:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:43:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2020-10-27 14:43:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:43:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-27 14:43:01,341 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 43 [2020-10-27 14:43:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:01,343 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-27 14:43:01,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:43:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-27 14:43:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:01,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:01,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:01,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:43:01,346 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:01,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 6 times [2020-10-27 14:43:01,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:01,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332512299] [2020-10-27 14:43:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:01,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:03,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:03,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:04,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:04,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:04,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:05,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:06,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:06,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:06,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:06,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:43:06,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:43:06,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:06,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:43:06,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:43:06,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:43:06,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:43:07,117 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-27 14:43:07,324 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-27 14:43:08,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:08,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:08,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:08,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:08,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:08,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:08,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:08,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:08,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:08,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:08,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:08,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:08,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:08,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:08,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:43:08,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332512299] [2020-10-27 14:43:08,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:08,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:43:08,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963680910] [2020-10-27 14:43:08,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:43:08,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:43:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:43:08,680 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 26 states. [2020-10-27 14:43:09,779 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-27 14:43:09,983 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 14:43:10,188 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-27 14:43:10,815 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 14:43:11,192 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-27 14:43:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:11,832 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-10-27 14:43:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:43:11,833 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-27 14:43:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:11,834 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:43:11,834 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:43:11,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=181, Invalid=1799, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:43:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:43:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-10-27 14:43:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:43:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-27 14:43:11,849 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 45 [2020-10-27 14:43:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:11,849 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-27 14:43:11,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:43:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-27 14:43:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:11,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:11,851 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:11,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:43:11,851 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 4 times [2020-10-27 14:43:11,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:11,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049667808] [2020-10-27 14:43:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:11,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:13,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:14,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:14,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:14,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:16,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:16,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:43:16,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:43:16,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:43:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:43:16,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:43:16,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:17,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:17,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:17,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:17,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:17,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:17,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:17,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:17,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:17,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:17,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:43:17,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049667808] [2020-10-27 14:43:17,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:17,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:43:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902697301] [2020-10-27 14:43:17,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:43:17,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:43:17,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:43:17,332 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 15 states. [2020-10-27 14:43:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:18,213 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2020-10-27 14:43:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:43:18,214 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 14:43:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:18,215 INFO L225 Difference]: With dead ends: 92 [2020-10-27 14:43:18,215 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:43:18,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:43:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:43:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2020-10-27 14:43:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:43:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-10-27 14:43:18,233 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 45 [2020-10-27 14:43:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:18,233 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-10-27 14:43:18,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:43:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-10-27 14:43:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:18,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:18,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:18,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:43:18,234 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 5 times [2020-10-27 14:43:18,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:18,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604700740] [2020-10-27 14:43:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:18,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:18,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:18,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:22,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:22,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:23,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:23,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:43:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:43:23,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:43:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:43:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:43:23,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:23,587 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2020-10-27 14:43:23,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:23,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:23,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:23,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:23,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:23,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:23,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:23,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:23,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:23,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:43:23,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604700740] [2020-10-27 14:43:23,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:23,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:43:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057233156] [2020-10-27 14:43:23,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:43:23,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:43:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:43:23,948 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 16 states. [2020-10-27 14:43:24,365 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-27 14:43:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:25,333 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2020-10-27 14:43:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:43:25,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 14:43:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:25,335 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:43:25,335 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:43:25,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:43:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:43:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2020-10-27 14:43:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:43:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-27 14:43:25,349 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 45 [2020-10-27 14:43:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:25,350 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-27 14:43:25,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:43:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-27 14:43:25,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:25,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:25,351 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:25,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:43:25,351 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash -437163407, now seen corresponding path program 6 times [2020-10-27 14:43:25,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:25,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831319066] [2020-10-27 14:43:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:26,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:26,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:30,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:30,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:43:30,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4636 [2020-10-27 14:43:30,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:30,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:43:30,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:43:30,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:43:30,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:30,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:30,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:30,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:30,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:43:30,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:30,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:30,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:30,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:30,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:30,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:30,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:30,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:30,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:30,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:30,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:30,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:43:30,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831319066] [2020-10-27 14:43:30,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:30,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:43:30,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695556677] [2020-10-27 14:43:30,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:43:30,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:30,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:43:30,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:43:30,460 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 15 states. [2020-10-27 14:43:31,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:31,313 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-10-27 14:43:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:43:31,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 14:43:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:31,315 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:43:31,315 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 14:43:31,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:43:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 14:43:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-27 14:43:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:43:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-27 14:43:31,329 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 45 [2020-10-27 14:43:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:31,330 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-27 14:43:31,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:43:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-27 14:43:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:43:31,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:31,330 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:31,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:43:31,332 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:31,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 7 times [2020-10-27 14:43:31,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:31,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79399867] [2020-10-27 14:43:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:31,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:31,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:32,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:32,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:43:32,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:43:32,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1443 [2020-10-27 14:43:32,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:43:32,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:43:32,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:43:32,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:32,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:32,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:32,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:32,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:32,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:32,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:32,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:32,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:32,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:32,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:32,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:32,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:32,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:32,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:32,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:32,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:32,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:32,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:43:32,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79399867] [2020-10-27 14:43:32,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:32,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:43:32,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687325981] [2020-10-27 14:43:32,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:43:32,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:32,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:43:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:43:32,963 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 12 states. [2020-10-27 14:43:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:33,478 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2020-10-27 14:43:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:43:33,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 14:43:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:33,482 INFO L225 Difference]: With dead ends: 185 [2020-10-27 14:43:33,482 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 14:43:33,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:43:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 14:43:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 68. [2020-10-27 14:43:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:43:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-10-27 14:43:33,500 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 47 [2020-10-27 14:43:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:33,500 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-10-27 14:43:33,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:43:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-10-27 14:43:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:43:33,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:33,501 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:33,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:43:33,501 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:33,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2062803320, now seen corresponding path program 8 times [2020-10-27 14:43:33,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:33,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349914191] [2020-10-27 14:43:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:33,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:33,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:33,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:33,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:38,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:43:38,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-27 14:43:38,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:43:38,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:38,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:43:38,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:43:38,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:43:38,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:38,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:38,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:38,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:38,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:43:38,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:38,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:38,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:38,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:38,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:38,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:38,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:38,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:38,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:38,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:38,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:38,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:43:38,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349914191] [2020-10-27 14:43:38,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:38,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:43:38,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685178392] [2020-10-27 14:43:38,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:43:38,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:43:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:43:38,691 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 12 states. [2020-10-27 14:43:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:39,265 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-10-27 14:43:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:43:39,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-27 14:43:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:39,267 INFO L225 Difference]: With dead ends: 94 [2020-10-27 14:43:39,267 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:43:39,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:43:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:43:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 56. [2020-10-27 14:43:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:43:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-27 14:43:39,281 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 50 [2020-10-27 14:43:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:39,282 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-27 14:43:39,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:43:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-27 14:43:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:43:39,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:39,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:39,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:43:39,286 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 9 times [2020-10-27 14:43:39,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:39,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200598015] [2020-10-27 14:43:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:39,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:40,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:40,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:41,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:41,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:42,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:42,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:43,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:43,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:44,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:43:44,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:43:44,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5248 [2020-10-27 14:43:44,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:43:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:43:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:43:44,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:45,013 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-10-27 14:43:45,234 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-27 14:43:45,794 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-27 14:43:45,966 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-27 14:43:46,126 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-27 14:43:46,313 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-27 14:43:46,679 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 14:43:46,909 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 14:43:48,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:48,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:48,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:48,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:48,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:48,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:48,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:48,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:48,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:48,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:48,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:48,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:48,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:48,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:48,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:48,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:48,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:48,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:43:48,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200598015] [2020-10-27 14:43:48,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:48,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:43:48,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851065375] [2020-10-27 14:43:48,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:43:48,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:48,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:43:48,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1051, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:43:48,808 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 34 states. [2020-10-27 14:43:50,077 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-27 14:43:50,525 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2020-10-27 14:43:50,727 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-27 14:43:51,130 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 36 [2020-10-27 14:43:51,531 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 40 [2020-10-27 14:43:51,853 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 26 [2020-10-27 14:43:52,359 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-27 14:43:52,704 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2020-10-27 14:43:53,227 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2020-10-27 14:43:53,716 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 14:43:54,209 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 14:43:54,457 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 14:43:54,765 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-27 14:43:55,006 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 14:43:55,455 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2020-10-27 14:43:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:57,026 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2020-10-27 14:43:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:43:57,027 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-10-27 14:43:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:57,028 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:43:57,028 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 14:43:57,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=320, Invalid=3462, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 14:43:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 14:43:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2020-10-27 14:43:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:43:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-10-27 14:43:57,048 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 52 [2020-10-27 14:43:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:57,048 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-10-27 14:43:57,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:43:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-10-27 14:43:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:43:57,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:57,051 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:57,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:43:57,052 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1426484168, now seen corresponding path program 7 times [2020-10-27 14:43:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:57,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792059504] [2020-10-27 14:43:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:57,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:58,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:59,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:01,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:01,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:44:02,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:02,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:02,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:02,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:02,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:02,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:44:02,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:02,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:02,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:02,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:02,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:02,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:02,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:02,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:02,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:02,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:02,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:02,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:02,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:02,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:02,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:02,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:44:02,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792059504] [2020-10-27 14:44:02,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:02,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:44:02,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585924811] [2020-10-27 14:44:02,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:44:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:02,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:44:02,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:44:02,806 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 20 states. [2020-10-27 14:44:03,547 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 14:44:03,869 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 14:44:04,052 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-27 14:44:04,305 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-27 14:44:04,730 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 14:44:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:05,234 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2020-10-27 14:44:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:44:05,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:44:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:05,236 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:44:05,236 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:44:05,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:44:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:44:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2020-10-27 14:44:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:44:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-10-27 14:44:05,254 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 52 [2020-10-27 14:44:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:05,254 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-10-27 14:44:05,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:44:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-10-27 14:44:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:44:05,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:05,255 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:05,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:44:05,255 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 8 times [2020-10-27 14:44:05,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:05,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579714381] [2020-10-27 14:44:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:05,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:05,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:07,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:07,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:07,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:08,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:08,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:08,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:10,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:10,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:44:10,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:44:10,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:44:10,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:10,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:44:10,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:44:10,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:44:10,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:11,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:11,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:11,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:11,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:11,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:11,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:11,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:44:11,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579714381] [2020-10-27 14:44:11,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:11,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:44:11,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864077405] [2020-10-27 14:44:11,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:44:11,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:11,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:44:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:44:11,084 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 20 states. [2020-10-27 14:44:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:12,546 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2020-10-27 14:44:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:44:12,547 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:44:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:12,549 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:44:12,549 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:44:12,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:44:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:44:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-10-27 14:44:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:44:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-10-27 14:44:12,566 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 52 [2020-10-27 14:44:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:12,566 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-10-27 14:44:12,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:44:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-10-27 14:44:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:44:12,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:12,567 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:12,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:44:12,567 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:12,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 9 times [2020-10-27 14:44:12,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:12,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761168837] [2020-10-27 14:44:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:12,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:12,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:12,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:13,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:14,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:17,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:44:17,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:44:17,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:44:17,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:44:17,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:44:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:44:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:18,219 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 14:44:18,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:18,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:18,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:18,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:18,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:18,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:18,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:18,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:18,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:18,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:18,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:18,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:18,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:18,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:18,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 14:44:18,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761168837] [2020-10-27 14:44:18,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:18,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:44:18,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620395316] [2020-10-27 14:44:18,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:44:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:44:18,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:44:18,525 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 19 states. [2020-10-27 14:44:19,580 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 14:44:19,927 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 14:44:20,170 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-27 14:44:20,314 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-27 14:44:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:20,823 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2020-10-27 14:44:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:44:20,824 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-27 14:44:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:20,826 INFO L225 Difference]: With dead ends: 127 [2020-10-27 14:44:20,826 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:44:20,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:44:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:44:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2020-10-27 14:44:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:44:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2020-10-27 14:44:20,847 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 52 [2020-10-27 14:44:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:20,848 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2020-10-27 14:44:20,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:44:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2020-10-27 14:44:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:44:20,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:20,848 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:20,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:44:20,848 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:20,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1689012476, now seen corresponding path program 10 times [2020-10-27 14:44:20,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:20,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777364570] [2020-10-27 14:44:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:20,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:20,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:21,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:21,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:21,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:21,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:21,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:22,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:24,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:25,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:25,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:44:25,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:44:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:44:25,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:44:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:44:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:44:25,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:26,156 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-27 14:44:26,394 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-27 14:44:26,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:26,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:26,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:26,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:26,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:44:26,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:26,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:26,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:26,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:26,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:26,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:26,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:26,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:26,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:26,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:26,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:26,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:44:26,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777364570] [2020-10-27 14:44:26,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:26,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:44:26,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065763601] [2020-10-27 14:44:26,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:44:26,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:26,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:44:26,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:44:26,640 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand 18 states. [2020-10-27 14:44:27,502 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-27 14:44:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:27,811 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2020-10-27 14:44:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:44:27,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-27 14:44:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:27,814 INFO L225 Difference]: With dead ends: 136 [2020-10-27 14:44:27,814 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:44:27,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:44:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:44:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-10-27 14:44:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 14:44:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2020-10-27 14:44:27,835 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 52 [2020-10-27 14:44:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:27,835 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2020-10-27 14:44:27,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:44:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2020-10-27 14:44:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:44:27,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:27,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:27,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:44:27,836 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 10 times [2020-10-27 14:44:27,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:27,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286072653] [2020-10-27 14:44:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:27,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:27,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:30,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:30,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:44:30,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:44:30,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2767 [2020-10-27 14:44:30,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:44:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:44:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:44:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:30,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:30,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:30,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:30,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:30,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:30,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:30,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:30,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:30,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:30,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:30,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:30,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:30,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:44:30,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286072653] [2020-10-27 14:44:30,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:30,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:44:30,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820177119] [2020-10-27 14:44:30,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:44:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:44:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:44:30,806 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 14 states. [2020-10-27 14:44:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:31,419 INFO L93 Difference]: Finished difference Result 265 states and 320 transitions. [2020-10-27 14:44:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:44:31,421 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 14:44:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:31,423 INFO L225 Difference]: With dead ends: 265 [2020-10-27 14:44:31,423 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 14:44:31,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:44:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 14:44:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2020-10-27 14:44:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 14:44:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-10-27 14:44:31,450 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 54 [2020-10-27 14:44:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:31,451 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-10-27 14:44:31,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:44:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-10-27 14:44:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:44:31,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:31,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:31,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:44:31,453 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash -740835996, now seen corresponding path program 11 times [2020-10-27 14:44:31,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:31,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036908984] [2020-10-27 14:44:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:31,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:32,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:32,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:36,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:44:36,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:44:36,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 14:44:36,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:36,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:44:36,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:44:36,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:44:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:36,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:36,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:36,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:36,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:36,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:44:36,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:36,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:36,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:36,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:36,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:36,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:36,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:36,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:36,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:36,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 14:44:36,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036908984] [2020-10-27 14:44:36,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:36,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:44:36,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946096285] [2020-10-27 14:44:36,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:44:36,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:36,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:44:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:44:36,696 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 14 states. [2020-10-27 14:44:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:37,419 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2020-10-27 14:44:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:44:37,420 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 14:44:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:37,422 INFO L225 Difference]: With dead ends: 143 [2020-10-27 14:44:37,422 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:44:37,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:44:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:44:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-10-27 14:44:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:44:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-27 14:44:37,441 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 54 [2020-10-27 14:44:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:37,441 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-27 14:44:37,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:44:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-27 14:44:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:44:37,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:37,442 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:37,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:44:37,442 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 12 times [2020-10-27 14:44:37,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:37,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910231588] [2020-10-27 14:44:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:37,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:38,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:40,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:42,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:42,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:42,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:44:42,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:44:42,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-27 14:44:42,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:42,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:44:42,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:44:42,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:44:42,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:43,269 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-27 14:44:43,422 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-27 14:44:43,622 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2020-10-27 14:44:43,772 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-27 14:44:44,047 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2020-10-27 14:44:44,293 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-10-27 14:44:44,546 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-27 14:44:44,742 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-27 14:44:44,966 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 14:44:45,167 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-27 14:44:45,368 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 14:44:45,549 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-27 14:44:45,776 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-27 14:44:45,967 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 14:44:48,013 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2020-10-27 14:44:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:48,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:48,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:48,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:48,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:48,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:44:48,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:48,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:48,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:48,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:44:48,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910231588] [2020-10-27 14:44:48,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:48,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:44:48,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189626682] [2020-10-27 14:44:48,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:44:48,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:44:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1320, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:44:48,584 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 38 states. [2020-10-27 14:44:49,549 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 14:44:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:52,133 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2020-10-27 14:44:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:44:52,134 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 59 [2020-10-27 14:44:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:52,136 INFO L225 Difference]: With dead ends: 104 [2020-10-27 14:44:52,136 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:44:52,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:44:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:44:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-27 14:44:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 14:44:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-27 14:44:52,160 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 59 [2020-10-27 14:44:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:52,160 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-27 14:44:52,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:44:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-27 14:44:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:44:52,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:52,161 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:52,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:44:52,162 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:52,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1786718545, now seen corresponding path program 11 times [2020-10-27 14:44:52,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:52,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394262474] [2020-10-27 14:44:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:52,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:52,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:52,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:52,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:52,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:53,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:53,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:53,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:54,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:55,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:55,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:55,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:57,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:57,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:57,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:44:57,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:44:57,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:44:57,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:44:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:44:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:44:57,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:58,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:58,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:58,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:58,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:58,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:58,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:58,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:58,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:58,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:58,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:58,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-27 14:44:58,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394262474] [2020-10-27 14:44:58,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:58,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:44:58,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595803139] [2020-10-27 14:44:58,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:44:58,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:58,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:44:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:44:58,039 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 19 states. [2020-10-27 14:44:58,389 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-27 14:44:58,966 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-27 14:44:59,125 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-27 14:44:59,283 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-27 14:44:59,514 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 14:44:59,682 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 14:44:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:59,849 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-27 14:44:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:44:59,850 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-27 14:44:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:59,852 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:44:59,852 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 14:44:59,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:44:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 14:44:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-27 14:44:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 14:44:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-27 14:44:59,871 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 59 [2020-10-27 14:44:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:59,871 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-27 14:44:59,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:44:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-27 14:44:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:44:59,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:59,872 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:59,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:44:59,873 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 12 times [2020-10-27 14:44:59,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:59,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144835231] [2020-10-27 14:44:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:59,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:59,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:00,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:00,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:02,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:02,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:04,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:04,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:04,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:04,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:45:04,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:45:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-27 14:45:04,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:45:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:45:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:45:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:06,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:06,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:06,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:06,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:06,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:45:06,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:06,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:06,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:06,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:06,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:06,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:06,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:06,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:06,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:06,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:06,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:45:06,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:06,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:06,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:06,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:06,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:45:06,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144835231] [2020-10-27 14:45:06,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:06,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:45:06,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655006998] [2020-10-27 14:45:06,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:45:06,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:06,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:45:06,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:45:06,068 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 21 states. [2020-10-27 14:45:07,109 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-27 14:45:07,513 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-27 14:45:07,681 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-27 14:45:07,844 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-27 14:45:08,039 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 14:45:08,233 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 14:45:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:08,733 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2020-10-27 14:45:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:45:08,734 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 14:45:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:08,736 INFO L225 Difference]: With dead ends: 125 [2020-10-27 14:45:08,736 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:45:08,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=397, Invalid=1673, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:45:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:45:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2020-10-27 14:45:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:45:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-27 14:45:08,754 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 59 [2020-10-27 14:45:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:08,755 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-27 14:45:08,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:45:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-27 14:45:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:45:08,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:08,755 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:08,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:45:08,756 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 13 times [2020-10-27 14:45:08,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:08,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483006315] [2020-10-27 14:45:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:08,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:08,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:08,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:10,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:10,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:13,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:13,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:13,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:45:13,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:45:13,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:45:13,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:13,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:45:13,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:45:13,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:45:13,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:14,153 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-27 14:45:14,321 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-27 14:45:14,598 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-27 14:45:15,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:15,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:15,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:15,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:15,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:15,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:45:15,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:15,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:15,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:15,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:15,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:15,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:15,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:15,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:15,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:15,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:15,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:45:15,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:15,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:15,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:15,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:15,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 41 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:45:15,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483006315] [2020-10-27 14:45:15,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:15,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:45:15,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946298958] [2020-10-27 14:45:15,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:45:15,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:15,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:45:15,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:45:15,151 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 24 states. [2020-10-27 14:45:17,122 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-27 14:45:17,439 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-27 14:45:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:17,937 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2020-10-27 14:45:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:45:17,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-27 14:45:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:17,939 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:45:17,939 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 14:45:17,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=431, Invalid=2019, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:45:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 14:45:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-10-27 14:45:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 14:45:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-27 14:45:17,964 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 59 [2020-10-27 14:45:17,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:17,964 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-27 14:45:17,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:45:17,964 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-27 14:45:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:45:17,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:17,965 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:17,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:45:17,965 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 14 times [2020-10-27 14:45:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:17,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487361820] [2020-10-27 14:45:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:18,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:18,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:18,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:18,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:18,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:19,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:19,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:19,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:20,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:21,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:22,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:22,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:22,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:45:22,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:45:22,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:45:22,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:45:22,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:45:22,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:45:22,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:23,474 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-27 14:45:23,749 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-10-27 14:45:24,010 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-10-27 14:45:24,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:24,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:24,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:24,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:24,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:24,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:45:24,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:24,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:24,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:24,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:24,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:24,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:24,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:24,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:24,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:45:24,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:24,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:24,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:24,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:24,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:45:24,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487361820] [2020-10-27 14:45:24,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:24,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:45:24,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272369742] [2020-10-27 14:45:24,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:45:24,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:24,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:45:24,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:45:24,280 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 20 states. [2020-10-27 14:45:24,984 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 14:45:25,302 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 14:45:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:26,074 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2020-10-27 14:45:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:45:26,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-27 14:45:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:26,077 INFO L225 Difference]: With dead ends: 147 [2020-10-27 14:45:26,077 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 14:45:26,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:45:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 14:45:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2020-10-27 14:45:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:45:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2020-10-27 14:45:26,102 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 59 [2020-10-27 14:45:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:26,102 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2020-10-27 14:45:26,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:45:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2020-10-27 14:45:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:45:26,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:26,103 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:26,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:45:26,104 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:26,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1291630161, now seen corresponding path program 15 times [2020-10-27 14:45:26,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:26,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090988392] [2020-10-27 14:45:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:26,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:26,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:26,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:26,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:27,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:28,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:31,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:31,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:45:31,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:45:31,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:45:31,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:31,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:45:31,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:45:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:45:31,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:31,867 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-27 14:45:32,156 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-27 14:45:32,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:32,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:32,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:32,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:32,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:32,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:45:32,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:32,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:32,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:32,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:32,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:32,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:32,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:32,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:32,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:32,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:32,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:45:32,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:32,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:45:32,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090988392] [2020-10-27 14:45:32,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:32,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:45:32,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811940962] [2020-10-27 14:45:32,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:45:32,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:32,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:45:32,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:45:32,552 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 23 states. [2020-10-27 14:45:33,370 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 14:45:33,885 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 14:45:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:34,445 INFO L93 Difference]: Finished difference Result 135 states and 157 transitions. [2020-10-27 14:45:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:45:34,446 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-27 14:45:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:34,447 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:45:34,447 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 14:45:34,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:45:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 14:45:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-27 14:45:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 14:45:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2020-10-27 14:45:34,478 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 59 [2020-10-27 14:45:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:34,478 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2020-10-27 14:45:34,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:45:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2020-10-27 14:45:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:45:34,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:34,479 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:34,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:45:34,480 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 13 times [2020-10-27 14:45:34,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:34,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335658823] [2020-10-27 14:45:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:34,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:38,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:38,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:45:38,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:45:38,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4492 [2020-10-27 14:45:38,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:38,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:45:38,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:45:38,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:45:38,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:39,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:39,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:39,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:39,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:39,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:45:39,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:39,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:39,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:39,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:39,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:39,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:39,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:39,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:39,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:39,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:39,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:45:39,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:39,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:39,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:39,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:39,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:45:39,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335658823] [2020-10-27 14:45:39,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:39,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:45:39,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250889606] [2020-10-27 14:45:39,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:45:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:45:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:45:39,220 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand 16 states. [2020-10-27 14:45:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:40,035 INFO L93 Difference]: Finished difference Result 408 states and 503 transitions. [2020-10-27 14:45:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:45:40,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-27 14:45:40,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:40,038 INFO L225 Difference]: With dead ends: 408 [2020-10-27 14:45:40,038 INFO L226 Difference]: Without dead ends: 233 [2020-10-27 14:45:40,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:45:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-27 14:45:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 106. [2020-10-27 14:45:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 14:45:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-10-27 14:45:40,069 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 61 [2020-10-27 14:45:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:40,069 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-10-27 14:45:40,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:45:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-10-27 14:45:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:45:40,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:40,070 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:40,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:45:40,070 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:40,071 INFO L82 PathProgramCache]: Analyzing trace with hash 519142560, now seen corresponding path program 14 times [2020-10-27 14:45:40,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:40,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084984409] [2020-10-27 14:45:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:40,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:40,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:40,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:40,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:40,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:41,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:41,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:41,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:41,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:41,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:42,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:43,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:43,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:43,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:44,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:44,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:44,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:44,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:44,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:45,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:45,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:45:45,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 14:45:45,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:45:45,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:45,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:45:45,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:45:45,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:45:45,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:45,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:45,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:45,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:45,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:45,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:45:45,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:45,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:45,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:45,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:45,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:45,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:45,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:45,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:45:45,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:45,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:45,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:45,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:45,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:45:45,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084984409] [2020-10-27 14:45:45,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:45,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:45:45,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324390225] [2020-10-27 14:45:45,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:45:45,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:45,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:45:45,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:45:45,673 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 22 states. [2020-10-27 14:45:46,535 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-27 14:45:46,977 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-27 14:45:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:47,710 INFO L93 Difference]: Finished difference Result 201 states and 241 transitions. [2020-10-27 14:45:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:45:47,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-10-27 14:45:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:47,713 INFO L225 Difference]: With dead ends: 201 [2020-10-27 14:45:47,713 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 14:45:47,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=523, Invalid=1547, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:45:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 14:45:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 91. [2020-10-27 14:45:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:45:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-27 14:45:47,745 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 64 [2020-10-27 14:45:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:47,745 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-27 14:45:47,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:45:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-27 14:45:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:45:47,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:47,746 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:47,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:45:47,746 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:47,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 15 times [2020-10-27 14:45:47,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:47,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641706962] [2020-10-27 14:45:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:47,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:48,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:50,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:52,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:52,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 14:45:52,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:45:52,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:45:52,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 14:45:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:45:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:45:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:53,331 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-27 14:45:53,461 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-27 14:45:53,634 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 14:45:53,847 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-27 14:45:54,026 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 14:45:54,269 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-27 14:45:54,543 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-27 14:45:54,767 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-27 14:45:55,064 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-27 14:45:55,379 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-27 14:45:55,637 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-27 14:45:55,973 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-27 14:45:56,339 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-27 14:45:56,626 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-10-27 14:45:56,871 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-27 14:45:57,048 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-27 14:45:57,216 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-27 14:45:57,416 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-27 14:45:57,684 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-27 14:45:57,890 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-27 14:45:58,102 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46