/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:56:14,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:56:14,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:56:14,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:56:14,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:56:14,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:56:14,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:56:14,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:56:14,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:56:14,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:56:14,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:56:14,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:56:14,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:56:14,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:56:14,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:56:14,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:56:14,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:56:14,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:56:14,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:56:14,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:56:14,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:56:14,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:56:14,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:56:14,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:56:14,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:56:14,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:56:14,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:56:14,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:56:14,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:56:14,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:56:14,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:56:14,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:56:14,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:56:14,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:56:14,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:56:14,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:56:14,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:56:14,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:56:14,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:56:14,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:56:14,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:56:14,758 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 [2020-10-26 22:56:14,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:56:14,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:56:14,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:56:14,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:56:14,820 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:56:14,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:56:14,820 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:56:14,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:56:14,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:56:14,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:56:14,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:56:14,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:56:14,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:56:14,823 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:56:14,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:56:14,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:56:14,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:56:14,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:56:14,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:56:14,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:56:14,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:56:14,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:56:14,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:56:14,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:56:14,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:56:14,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:56:14,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:56:14,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:56:14,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:56:14,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:56:15,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:56:15,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:56:15,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:56:15,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:56:15,278 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:56:15,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label38.c [2020-10-26 22:56:15,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80485b76c/9007f3bc0ac64e1e8837d85bd5d55094/FLAG575090773 [2020-10-26 22:56:16,615 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:56:16,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label38.c [2020-10-26 22:56:16,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80485b76c/9007f3bc0ac64e1e8837d85bd5d55094/FLAG575090773 [2020-10-26 22:56:16,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80485b76c/9007f3bc0ac64e1e8837d85bd5d55094 [2020-10-26 22:56:16,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:56:17,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:56:17,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:56:17,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:56:17,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:56:17,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:56:16" (1/1) ... [2020-10-26 22:56:17,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c74cb9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:17, skipping insertion in model container [2020-10-26 22:56:17,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:56:16" (1/1) ... [2020-10-26 22:56:17,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:56:17,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:56:18,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:56:18,674 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:56:19,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:56:19,349 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:56:19,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19 WrapperNode [2020-10-26 22:56:19,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:56:19,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:56:19,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:56:19,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:56:19,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (1/1) ... [2020-10-26 22:56:19,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (1/1) ... [2020-10-26 22:56:19,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (1/1) ... [2020-10-26 22:56:19,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (1/1) ... [2020-10-26 22:56:19,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (1/1) ... [2020-10-26 22:56:19,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (1/1) ... [2020-10-26 22:56:19,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (1/1) ... [2020-10-26 22:56:19,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:56:19,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:56:19,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:56:19,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:56:19,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (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 [2020-10-26 22:56:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:56:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:56:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:56:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:56:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:56:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:56:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:56:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:56:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:56:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:56:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:56:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:56:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:56:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:56:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:56:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:56:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:56:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:56:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:56:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:56:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:56:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:56:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:56:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:56:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:56:24,853 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:56:24,853 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:56:24,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:56:24 BoogieIcfgContainer [2020-10-26 22:56:24,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:56:24,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:56:24,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:56:24,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:56:24,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:56:16" (1/3) ... [2020-10-26 22:56:24,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3e0432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:56:24, skipping insertion in model container [2020-10-26 22:56:24,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:19" (2/3) ... [2020-10-26 22:56:24,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3e0432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:56:24, skipping insertion in model container [2020-10-26 22:56:24,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:56:24" (3/3) ... [2020-10-26 22:56:24,870 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label38.c [2020-10-26 22:56:24,887 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:56:24,894 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:56:24,910 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:56:24,968 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:56:24,968 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:56:24,968 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:56:24,968 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:56:24,968 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:56:24,969 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:56:24,969 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:56:24,969 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:56:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:56:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 22:56:25,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:25,035 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] [2020-10-26 22:56:25,035 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash -774400916, now seen corresponding path program 1 times [2020-10-26 22:56:25,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:25,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210636584] [2020-10-26 22:56:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:25,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:25,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 22:56:25,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:25,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-26 22:56:25,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:25,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 22:56:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:56:26,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:26,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:26,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:26,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:26,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:26,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 22:56:26,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:26,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:26,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:26,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210636584] [2020-10-26 22:56:26,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:26,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:56:26,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429708801] [2020-10-26 22:56:26,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:56:26,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:56:26,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:56:26,120 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 22:56:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:37,920 INFO L93 Difference]: Finished difference Result 2492 states and 4750 transitions. [2020-10-26 22:56:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:56:37,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-26 22:56:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:37,966 INFO L225 Difference]: With dead ends: 2492 [2020-10-26 22:56:37,966 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:56:37,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:56:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:56:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:56:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:56:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2470 transitions. [2020-10-26 22:56:38,197 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2470 transitions. Word has length 31 [2020-10-26 22:56:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:38,197 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2470 transitions. [2020-10-26 22:56:38,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:56:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2470 transitions. [2020-10-26 22:56:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 22:56:38,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:38,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:56:38,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:56:38,207 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1116355069, now seen corresponding path program 1 times [2020-10-26 22:56:38,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:38,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761801245] [2020-10-26 22:56:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:38,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:39,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:40,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:40,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 22:56:40,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:56:40,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1786 [2020-10-26 22:56:40,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:40,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:56:40,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:40,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:40,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:40,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:40,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:40,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:40,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 22:56:40,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:40,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:40,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:40,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 22:56:40,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:40,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:40,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:40,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:56:40,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:40,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 22:56:40,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:40,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:40,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:40,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:56:40,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:40,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761801245] [2020-10-26 22:56:40,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:40,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:56:40,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337953009] [2020-10-26 22:56:40,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:56:40,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:40,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:56:40,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:56:40,503 INFO L87 Difference]: Start difference. First operand 1554 states and 2470 transitions. Second operand 7 states. [2020-10-26 22:56:53,245 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:56:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:55,883 INFO L93 Difference]: Finished difference Result 4775 states and 7604 transitions. [2020-10-26 22:56:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:56:55,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-10-26 22:56:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:55,905 INFO L225 Difference]: With dead ends: 4775 [2020-10-26 22:56:55,906 INFO L226 Difference]: Without dead ends: 3227 [2020-10-26 22:56:55,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:56:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2020-10-26 22:56:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3142. [2020-10-26 22:56:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3142 states. [2020-10-26 22:56:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4463 transitions. [2020-10-26 22:56:56,036 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4463 transitions. Word has length 103 [2020-10-26 22:56:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:56,036 INFO L481 AbstractCegarLoop]: Abstraction has 3142 states and 4463 transitions. [2020-10-26 22:56:56,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:56:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4463 transitions. [2020-10-26 22:56:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 22:56:56,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:56,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:56:56,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:56:56,040 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1223784235, now seen corresponding path program 1 times [2020-10-26 22:56:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:56,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108424215] [2020-10-26 22:56:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:56,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:56,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:57,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:57,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 22:56:57,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:56:57,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-10-26 22:56:57,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:57,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 22:56:57,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:57,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:57,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:57,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:57,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:57,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:57,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 22:56:57,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:57,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:57,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:57,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:57,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:57,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:57,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:57,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:57,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:56:57,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:57,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 22:56:57,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:56:57,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:57,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108424215] [2020-10-26 22:56:57,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:57,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:56:57,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834735484] [2020-10-26 22:56:57,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:56:57,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:57,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:56:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:56:57,677 INFO L87 Difference]: Start difference. First operand 3142 states and 4463 transitions. Second operand 7 states. [2020-10-26 22:57:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:14,664 INFO L93 Difference]: Finished difference Result 9650 states and 13883 transitions. [2020-10-26 22:57:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:57:14,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-26 22:57:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:14,712 INFO L225 Difference]: With dead ends: 9650 [2020-10-26 22:57:14,712 INFO L226 Difference]: Without dead ends: 6514 [2020-10-26 22:57:14,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:57:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6514 states. [2020-10-26 22:57:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6514 to 6389. [2020-10-26 22:57:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6389 states. [2020-10-26 22:57:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6389 states to 6389 states and 8545 transitions. [2020-10-26 22:57:14,979 INFO L78 Accepts]: Start accepts. Automaton has 6389 states and 8545 transitions. Word has length 110 [2020-10-26 22:57:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:14,980 INFO L481 AbstractCegarLoop]: Abstraction has 6389 states and 8545 transitions. [2020-10-26 22:57:14,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6389 states and 8545 transitions. [2020-10-26 22:57:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-26 22:57:14,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:14,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:14,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:57:14,994 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:14,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1092611559, now seen corresponding path program 1 times [2020-10-26 22:57:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:14,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469925188] [2020-10-26 22:57:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:15,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:15,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:16,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:16,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 22:57:16,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:57:16,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-10-26 22:57:16,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:16,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:16,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:57:16,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 22:57:16,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:16,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:16,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:16,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:16,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:16,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:57:16,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:57:16,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:16,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:16,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:16,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:57:16,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:16,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-26 22:57:16,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:57:16,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:57:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:57:16,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469925188] [2020-10-26 22:57:16,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:57:16,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:57:16,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396776896] [2020-10-26 22:57:16,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:57:16,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:57:17,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:57:17,008 INFO L87 Difference]: Start difference. First operand 6389 states and 8545 transitions. Second operand 7 states. [2020-10-26 22:57:17,159 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:57:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:33,513 INFO L93 Difference]: Finished difference Result 19645 states and 27097 transitions. [2020-10-26 22:57:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:57:33,515 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2020-10-26 22:57:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:33,594 INFO L225 Difference]: With dead ends: 19645 [2020-10-26 22:57:33,594 INFO L226 Difference]: Without dead ends: 13262 [2020-10-26 22:57:33,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:57:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13262 states. [2020-10-26 22:57:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13262 to 13055. [2020-10-26 22:57:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13055 states. [2020-10-26 22:57:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13055 states to 13055 states and 17238 transitions. [2020-10-26 22:57:34,040 INFO L78 Accepts]: Start accepts. Automaton has 13055 states and 17238 transitions. Word has length 144 [2020-10-26 22:57:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:34,041 INFO L481 AbstractCegarLoop]: Abstraction has 13055 states and 17238 transitions. [2020-10-26 22:57:34,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 13055 states and 17238 transitions. [2020-10-26 22:57:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 22:57:34,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:34,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:34,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:57:34,046 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:34,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1955330326, now seen corresponding path program 1 times [2020-10-26 22:57:34,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:34,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403284520] [2020-10-26 22:57:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:34,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:35,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:35,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:35,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 22:57:35,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:57:35,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1387 [2020-10-26 22:57:35,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:35,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:35,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:57:35,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 22:57:35,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:35,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:35,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:35,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:35,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:35,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:35,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:57:35,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:35,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:57:35,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:35,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:57:35,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:35,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:35,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:35,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:35,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:57:35,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:35,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 22:57:35,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:35,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:35,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:35,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:57:35,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:57:35,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:57:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:35,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:36,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:36,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 22:57:36,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:36,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-26 22:57:36,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 22:57:36,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:57:36,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403284520] [2020-10-26 22:57:36,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:57:36,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:57:36,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100097454] [2020-10-26 22:57:36,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:57:36,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:57:36,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:57:36,296 INFO L87 Difference]: Start difference. First operand 13055 states and 17238 transitions. Second operand 8 states. [2020-10-26 22:58:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:02,302 INFO L93 Difference]: Finished difference Result 34908 states and 51131 transitions. [2020-10-26 22:58:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:58:02,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2020-10-26 22:58:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:02,407 INFO L225 Difference]: With dead ends: 34908 [2020-10-26 22:58:02,407 INFO L226 Difference]: Without dead ends: 17810 [2020-10-26 22:58:02,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-26 22:58:02,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17810 states. [2020-10-26 22:58:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17810 to 17515. [2020-10-26 22:58:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17515 states. [2020-10-26 22:58:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17515 states to 17515 states and 23148 transitions. [2020-10-26 22:58:03,034 INFO L78 Accepts]: Start accepts. Automaton has 17515 states and 23148 transitions. Word has length 206 [2020-10-26 22:58:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:03,035 INFO L481 AbstractCegarLoop]: Abstraction has 17515 states and 23148 transitions. [2020-10-26 22:58:03,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:58:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 17515 states and 23148 transitions. [2020-10-26 22:58:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-26 22:58:03,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:03,041 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:03,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:58:03,041 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:03,042 INFO L82 PathProgramCache]: Analyzing trace with hash -341052260, now seen corresponding path program 1 times [2020-10-26 22:58:03,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:03,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583002658] [2020-10-26 22:58:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:03,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:03,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:04,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:05,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:05,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-26 22:58:05,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:58:05,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1949 [2020-10-26 22:58:05,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:58:05,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:58:05,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-26 22:58:05,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:05,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:05,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:05,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:05,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:05,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:58:05,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:05,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:05,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:05,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:05,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:05,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:05,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:05,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:05,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:58:05,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:05,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-26 22:58:05,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:58:05,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:05,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:58:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:05,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:05,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:06,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:06,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:58:06,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:58:06,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-26 22:58:06,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:06,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:58:06,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 107 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:58:06,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583002658] [2020-10-26 22:58:06,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:06,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:58:06,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794712261] [2020-10-26 22:58:06,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:58:06,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:58:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:58:06,184 INFO L87 Difference]: Start difference. First operand 17515 states and 23148 transitions. Second operand 8 states. [2020-10-26 22:58:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:35,723 INFO L93 Difference]: Finished difference Result 42794 states and 59300 transitions. [2020-10-26 22:58:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 22:58:35,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 265 [2020-10-26 22:58:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:35,846 INFO L225 Difference]: With dead ends: 42794 [2020-10-26 22:58:35,846 INFO L226 Difference]: Without dead ends: 26052 [2020-10-26 22:58:35,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:58:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26052 states. [2020-10-26 22:58:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26052 to 25908. [2020-10-26 22:58:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25908 states. [2020-10-26 22:58:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 34731 transitions. [2020-10-26 22:58:36,796 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 34731 transitions. Word has length 265 [2020-10-26 22:58:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:36,798 INFO L481 AbstractCegarLoop]: Abstraction has 25908 states and 34731 transitions. [2020-10-26 22:58:36,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:58:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 34731 transitions. [2020-10-26 22:58:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-26 22:58:36,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:36,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:36,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:58:36,806 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 273099668, now seen corresponding path program 1 times [2020-10-26 22:58:36,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:36,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181525018] [2020-10-26 22:58:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:37,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:37,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:39,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-26 22:58:39,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:58:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2580 [2020-10-26 22:58:39,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:58:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:58:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-26 22:58:39,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:39,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:39,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:39,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:39,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:39,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:58:39,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:39,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:39,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:39,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:58:39,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:39,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 22:58:39,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:39,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:39,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:39,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:58:39,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:40,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:58:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:40,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:40,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:40,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:58:40,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:58:40,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-26 22:58:40,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:40,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:40,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:40,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:58:40,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 107 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:58:40,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181525018] [2020-10-26 22:58:40,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:40,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:58:40,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094265384] [2020-10-26 22:58:40,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:58:40,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:40,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:58:40,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:58:40,537 INFO L87 Difference]: Start difference. First operand 25908 states and 34731 transitions. Second operand 6 states. [2020-10-26 22:59:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:02,334 INFO L93 Difference]: Finished difference Result 73121 states and 107478 transitions. [2020-10-26 22:59:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:59:02,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 269 [2020-10-26 22:59:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:02,518 INFO L225 Difference]: With dead ends: 73121 [2020-10-26 22:59:02,519 INFO L226 Difference]: Without dead ends: 47986 [2020-10-26 22:59:02,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:59:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47986 states. [2020-10-26 22:59:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47986 to 47575. [2020-10-26 22:59:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47575 states. [2020-10-26 22:59:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47575 states to 47575 states and 61401 transitions. [2020-10-26 22:59:03,897 INFO L78 Accepts]: Start accepts. Automaton has 47575 states and 61401 transitions. Word has length 269 [2020-10-26 22:59:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:03,898 INFO L481 AbstractCegarLoop]: Abstraction has 47575 states and 61401 transitions. [2020-10-26 22:59:03,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:59:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 47575 states and 61401 transitions. [2020-10-26 22:59:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-26 22:59:03,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:03,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:59:03,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:59:03,905 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1489679973, now seen corresponding path program 1 times [2020-10-26 22:59:03,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:03,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627985212] [2020-10-26 22:59:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:04,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:04,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:06,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:06,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-26 22:59:06,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:59:06,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2386 [2020-10-26 22:59:06,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:06,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:59:06,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:59:06,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-26 22:59:06,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:06,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:59:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:06,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:06,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:06,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:59:06,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 22:59:06,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:59:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:59:06,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:06,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:59:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:06,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:07,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:07,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-26 22:59:07,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:07,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-26 22:59:07,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:07,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:07,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:59:07,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 253 [2020-10-26 22:59:07,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:59:07,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627985212] [2020-10-26 22:59:07,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:59:07,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:59:07,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82714119] [2020-10-26 22:59:07,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:59:07,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:59:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:59:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:59:07,502 INFO L87 Difference]: Start difference. First operand 47575 states and 61401 transitions. Second operand 7 states. [2020-10-26 22:59:07,640 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:59:20,497 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:59:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:26,409 INFO L93 Difference]: Finished difference Result 111148 states and 146338 transitions. [2020-10-26 22:59:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:59:26,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 283 [2020-10-26 22:59:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:26,626 INFO L225 Difference]: With dead ends: 111148 [2020-10-26 22:59:26,627 INFO L226 Difference]: Without dead ends: 63579 [2020-10-26 22:59:26,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:59:26,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63579 states. [2020-10-26 22:59:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63579 to 61882. [2020-10-26 22:59:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61882 states. [2020-10-26 22:59:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61882 states to 61882 states and 78348 transitions. [2020-10-26 22:59:28,821 INFO L78 Accepts]: Start accepts. Automaton has 61882 states and 78348 transitions. Word has length 283 [2020-10-26 22:59:28,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:28,822 INFO L481 AbstractCegarLoop]: Abstraction has 61882 states and 78348 transitions. [2020-10-26 22:59:28,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:59:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 61882 states and 78348 transitions. [2020-10-26 22:59:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-26 22:59:28,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:28,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2020-10-26 22:59:28,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:59:28,833 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1039368268, now seen corresponding path program 1 times [2020-10-26 22:59:28,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:28,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424807571] [2020-10-26 22:59:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:29,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:29,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:32,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:34,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:34,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-26 22:59:34,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:59:34,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 22:59:34,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:34,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:59:34,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:59:34,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:59:34,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:34,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:59:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:34,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:34,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:34,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:59:34,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:34,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:59:34,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:59:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:59:34,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:34,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:59:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:34,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:34,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:34,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:59:34,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 22:59:34,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:59:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:59:34,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:34,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-26 22:59:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:34,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:34,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:34,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-26 22:59:34,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:34,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 22:59:34,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-26 22:59:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 46 proven. 143 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:59:35,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424807571] [2020-10-26 22:59:35,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:59:35,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:59:35,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073070555] [2020-10-26 22:59:35,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:59:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:59:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:59:35,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:59:35,273 INFO L87 Difference]: Start difference. First operand 61882 states and 78348 transitions. Second operand 7 states. [2020-10-26 22:59:35,424 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-26 22:59:49,650 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:59:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:53,760 INFO L93 Difference]: Finished difference Result 130497 states and 165741 transitions. [2020-10-26 22:59:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:59:53,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 342 [2020-10-26 22:59:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:53,982 INFO L225 Difference]: With dead ends: 130497 [2020-10-26 22:59:53,982 INFO L226 Difference]: Without dead ends: 69388 [2020-10-26 22:59:54,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:59:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69388 states. [2020-10-26 22:59:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69388 to 68275. [2020-10-26 22:59:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68275 states. [2020-10-26 22:59:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68275 states to 68275 states and 85407 transitions. [2020-10-26 22:59:56,409 INFO L78 Accepts]: Start accepts. Automaton has 68275 states and 85407 transitions. Word has length 342 [2020-10-26 22:59:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:56,409 INFO L481 AbstractCegarLoop]: Abstraction has 68275 states and 85407 transitions. [2020-10-26 22:59:56,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:59:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 68275 states and 85407 transitions. [2020-10-26 22:59:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-10-26 22:59:56,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:56,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:59:56,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:59:56,444 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 687048760, now seen corresponding path program 1 times [2020-10-26 22:59:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:56,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534590595] [2020-10-26 22:59:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:56,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:57,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:57,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking...