/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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:33:14,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:33:14,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:33:14,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:33:14,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:33:14,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:33:14,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:33:14,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:33:14,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:33:14,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:33:14,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:33:14,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:33:14,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:33:14,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:33:14,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:33:14,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:33:14,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:33:14,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:33:14,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:33:14,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:33:14,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:33:14,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:33:14,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:33:14,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:33:14,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:33:14,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:33:14,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:33:14,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:33:14,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:33:14,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:33:14,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:33:14,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:33:14,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:33:14,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:33:14,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:33:14,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:33:14,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:33:14,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:33:14,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:33:14,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:33:14,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:33:14,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:33:14,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:33:14,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:33:14,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:33:14,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:33:14,885 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:33:14,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:33:14,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:33:14,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:33:14,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:33:14,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:33:14,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:33:14,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:33:14,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:33:14,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:33:14,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:33:14,888 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:33:14,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:33:14,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:33:14,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:33:14,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:33:14,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:33:14,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:33:14,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:33:14,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:33:14,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:33:14,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:33:14,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:33:14,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:33:14,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:33:14,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:33:15,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:33:15,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:33:15,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:33:15,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:33:15,295 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:33:15,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:33:15,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59304ea37/f163b1061ba049d084bf831a23bf2716/FLAG4c1616aa2 [2020-10-27 05:33:16,259 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:33:16,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:33:16,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59304ea37/f163b1061ba049d084bf831a23bf2716/FLAG4c1616aa2 [2020-10-27 05:33:16,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59304ea37/f163b1061ba049d084bf831a23bf2716 [2020-10-27 05:33:16,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:33:16,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:33:16,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:33:16,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:33:16,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:33:16,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:33:16" (1/1) ... [2020-10-27 05:33:16,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b79d1d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:16, skipping insertion in model container [2020-10-27 05:33:16,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:33:16" (1/1) ... [2020-10-27 05:33:16,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:33:16,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:33:17,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:33:17,230 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:33:17,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:33:17,558 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:33:17,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17 WrapperNode [2020-10-27 05:33:17,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:33:17,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:33:17,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:33:17,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:33:17,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (1/1) ... [2020-10-27 05:33:17,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (1/1) ... [2020-10-27 05:33:17,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (1/1) ... [2020-10-27 05:33:17,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (1/1) ... [2020-10-27 05:33:17,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (1/1) ... [2020-10-27 05:33:17,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (1/1) ... [2020-10-27 05:33:17,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (1/1) ... [2020-10-27 05:33:17,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:33:17,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:33:17,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:33:17,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:33:17,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:33:17,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:33:17,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:33:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:33:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:33:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:33:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:33:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:33:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:33:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:33:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:33:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:33:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:33:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:33:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:33:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:33:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:33:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:33:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:33:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:33:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:33:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:33:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:33:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:33:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:33:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:33:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:33:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:33:19,869 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:33:19,869 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:33:19,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:33:19 BoogieIcfgContainer [2020-10-27 05:33:19,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:33:19,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:33:19,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:33:19,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:33:19,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:33:16" (1/3) ... [2020-10-27 05:33:19,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15dac8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:33:19, skipping insertion in model container [2020-10-27 05:33:19,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:17" (2/3) ... [2020-10-27 05:33:19,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15dac8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:33:19, skipping insertion in model container [2020-10-27 05:33:19,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:33:19" (3/3) ... [2020-10-27 05:33:19,881 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:33:19,894 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:33:19,900 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:33:19,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:33:19,946 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:33:19,946 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:33:19,946 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:33:19,947 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:33:19,947 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:33:19,947 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:33:19,947 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:33:19,947 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:33:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states. [2020-10-27 05:33:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:33:19,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:19,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:19,993 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:19,999 INFO L82 PathProgramCache]: Analyzing trace with hash 973982076, now seen corresponding path program 1 times [2020-10-27 05:33:20,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:20,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550711167] [2020-10-27 05:33:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:20,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:21,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:22,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:22,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:23,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:23,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:24,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:24,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:25,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:25,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:33:25,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:33:25,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:33:25,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:25,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:33:25,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:25,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:33:25,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:33:26,503 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:33:26,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:26,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:26,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:26,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:26,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:26,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 05:33:26,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:26,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:26,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:26,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:33:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:26,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550711167] [2020-10-27 05:33:26,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:26,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:33:26,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15457078] [2020-10-27 05:33:26,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:33:26,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:33:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:33:26,701 INFO L87 Difference]: Start difference. First operand 466 states. Second operand 7 states. [2020-10-27 05:33:27,595 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2020-10-27 05:33:32,366 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-27 05:33:33,924 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:33:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:34,102 INFO L93 Difference]: Finished difference Result 883 states and 1519 transitions. [2020-10-27 05:33:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:33:34,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 05:33:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:34,132 INFO L225 Difference]: With dead ends: 883 [2020-10-27 05:33:34,132 INFO L226 Difference]: Without dead ends: 703 [2020-10-27 05:33:34,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:33:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-27 05:33:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 460. [2020-10-27 05:33:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-27 05:33:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 597 transitions. [2020-10-27 05:33:34,264 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 597 transitions. Word has length 56 [2020-10-27 05:33:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:34,266 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 597 transitions. [2020-10-27 05:33:34,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:33:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 597 transitions. [2020-10-27 05:33:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:33:34,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:34,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:34,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:33:34,279 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:34,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1596873572, now seen corresponding path program 1 times [2020-10-27 05:33:34,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:34,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192274760] [2020-10-27 05:33:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:34,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:34,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:34,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:34,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:34,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:35,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:36,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:37,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:38,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:38,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:39,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:39,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:33:39,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:33:39,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 05:33:39,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:39,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:39,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:39,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:33:39,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:40,138 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:33:40,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:40,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:40,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:40,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:40,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:40,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 05:33:40,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:40,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:40,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:40,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:40,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192274760] [2020-10-27 05:33:40,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:40,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:40,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534140094] [2020-10-27 05:33:40,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:40,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:40,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:40,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:40,235 INFO L87 Difference]: Start difference. First operand 460 states and 597 transitions. Second operand 6 states. [2020-10-27 05:33:41,075 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:33:43,456 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:33:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:44,028 INFO L93 Difference]: Finished difference Result 826 states and 1109 transitions. [2020-10-27 05:33:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:33:44,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:33:44,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:44,032 INFO L225 Difference]: With dead ends: 826 [2020-10-27 05:33:44,032 INFO L226 Difference]: Without dead ends: 487 [2020-10-27 05:33:44,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:33:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-10-27 05:33:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 481. [2020-10-27 05:33:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-27 05:33:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 646 transitions. [2020-10-27 05:33:44,088 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 646 transitions. Word has length 56 [2020-10-27 05:33:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:44,089 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 646 transitions. [2020-10-27 05:33:44,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 646 transitions. [2020-10-27 05:33:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:33:44,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:44,095 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:44,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:33:44,095 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash 458763897, now seen corresponding path program 1 times [2020-10-27 05:33:44,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:44,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109560653] [2020-10-27 05:33:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:44,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:44,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:44,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:44,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:45,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:45,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:46,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:49,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:49,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:33:49,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:33:49,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:33:49,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:33:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:33:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:50,022 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:33:50,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:50,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:50,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:50,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:50,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:50,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 05:33:50,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:50,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109560653] [2020-10-27 05:33:50,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:50,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:33:50,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53893620] [2020-10-27 05:33:50,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:33:50,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:50,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:33:50,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:33:50,152 INFO L87 Difference]: Start difference. First operand 481 states and 646 transitions. Second operand 8 states. [2020-10-27 05:33:50,953 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:33:53,794 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:33:55,410 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:33:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:55,677 INFO L93 Difference]: Finished difference Result 1421 states and 2048 transitions. [2020-10-27 05:33:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:33:55,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 05:33:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:55,691 INFO L225 Difference]: With dead ends: 1421 [2020-10-27 05:33:55,691 INFO L226 Difference]: Without dead ends: 1199 [2020-10-27 05:33:55,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:33:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2020-10-27 05:33:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 495. [2020-10-27 05:33:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-27 05:33:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 660 transitions. [2020-10-27 05:33:55,746 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 660 transitions. Word has length 57 [2020-10-27 05:33:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:55,750 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 660 transitions. [2020-10-27 05:33:55,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:33:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 660 transitions. [2020-10-27 05:33:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:33:55,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:55,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:55,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:33:55,752 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1964081005, now seen corresponding path program 1 times [2020-10-27 05:33:55,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:55,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537847637] [2020-10-27 05:33:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:55,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:55,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:56,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:56,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:56,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:57,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:00,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:00,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:00,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:34:00,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:34:00,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:34:00,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:00,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:34:00,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:00,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:34:00,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:01,684 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:34:01,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:01,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:01,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:01,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:01,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:01,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 05:34:01,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:01,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:01,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:01,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537847637] [2020-10-27 05:34:01,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:01,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:34:01,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120602561] [2020-10-27 05:34:01,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:34:01,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:34:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:34:01,789 INFO L87 Difference]: Start difference. First operand 495 states and 660 transitions. Second operand 9 states. [2020-10-27 05:34:02,608 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:34:05,633 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:34:07,565 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:34:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:07,935 INFO L93 Difference]: Finished difference Result 1217 states and 1720 transitions. [2020-10-27 05:34:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:34:07,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 05:34:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:07,943 INFO L225 Difference]: With dead ends: 1217 [2020-10-27 05:34:07,943 INFO L226 Difference]: Without dead ends: 1091 [2020-10-27 05:34:07,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:34:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2020-10-27 05:34:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 529. [2020-10-27 05:34:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-10-27 05:34:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 708 transitions. [2020-10-27 05:34:07,998 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 708 transitions. Word has length 58 [2020-10-27 05:34:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:07,998 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 708 transitions. [2020-10-27 05:34:07,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:34:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 708 transitions. [2020-10-27 05:34:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:34:08,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:08,001 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:08,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:34:08,001 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:08,002 INFO L82 PathProgramCache]: Analyzing trace with hash 378597285, now seen corresponding path program 1 times [2020-10-27 05:34:08,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:08,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060572102] [2020-10-27 05:34:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:08,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:08,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:08,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:08,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:08,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:09,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:09,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:09,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:13,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:13,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:34:13,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:34:13,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:34:13,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:34:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:34:13,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:13,996 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:34:13,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:14,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:14,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:14,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:14,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:14,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:34:14,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:14,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:14,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:14,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:14,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:34:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:14,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060572102] [2020-10-27 05:34:14,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:14,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:34:14,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354046862] [2020-10-27 05:34:14,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:34:14,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:14,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:34:14,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:14,108 INFO L87 Difference]: Start difference. First operand 529 states and 708 transitions. Second operand 11 states. [2020-10-27 05:34:14,906 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:34:17,698 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-27 05:34:18,559 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-27 05:34:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:20,239 INFO L93 Difference]: Finished difference Result 1694 states and 2387 transitions. [2020-10-27 05:34:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:34:20,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-27 05:34:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:20,247 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 05:34:20,247 INFO L226 Difference]: Without dead ends: 1339 [2020-10-27 05:34:20,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:34:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2020-10-27 05:34:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 673. [2020-10-27 05:34:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2020-10-27 05:34:20,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 919 transitions. [2020-10-27 05:34:20,324 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 919 transitions. Word has length 58 [2020-10-27 05:34:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:20,324 INFO L481 AbstractCegarLoop]: Abstraction has 673 states and 919 transitions. [2020-10-27 05:34:20,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:34:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 919 transitions. [2020-10-27 05:34:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:34:20,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:20,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:20,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:34:20,327 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2062456464, now seen corresponding path program 1 times [2020-10-27 05:34:20,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:20,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052506064] [2020-10-27 05:34:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:20,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:25,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:25,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:34:25,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:34:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:34:25,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:34:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:34:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:26,248 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:34:26,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:26,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:26,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:26,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:26,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:26,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:34:26,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:26,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:26,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:26,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052506064] [2020-10-27 05:34:26,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:26,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:34:26,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083191995] [2020-10-27 05:34:26,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:34:26,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:34:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:34:26,389 INFO L87 Difference]: Start difference. First operand 673 states and 919 transitions. Second operand 8 states. [2020-10-27 05:34:27,197 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:34:29,636 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:34:31,390 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:34:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:31,770 INFO L93 Difference]: Finished difference Result 2276 states and 3246 transitions. [2020-10-27 05:34:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:34:31,771 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-27 05:34:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:31,781 INFO L225 Difference]: With dead ends: 2276 [2020-10-27 05:34:31,781 INFO L226 Difference]: Without dead ends: 1957 [2020-10-27 05:34:31,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:34:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2020-10-27 05:34:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 677. [2020-10-27 05:34:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-10-27 05:34:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 923 transitions. [2020-10-27 05:34:31,868 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 923 transitions. Word has length 58 [2020-10-27 05:34:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:31,868 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 923 transitions. [2020-10-27 05:34:31,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:34:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 923 transitions. [2020-10-27 05:34:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:34:31,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:31,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:31,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:34:31,871 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1347875024, now seen corresponding path program 1 times [2020-10-27 05:34:31,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:31,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881014825] [2020-10-27 05:34:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:31,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:32,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:32,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:32,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:33,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:33,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:35,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:35,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:36,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:36,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:36,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:36,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:34:36,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:34:36,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:34:36,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:36,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:34:36,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:36,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:34:36,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:37,867 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:34:37,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:37,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:37,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:37,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:37,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:37,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:34:37,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:37,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:37,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:37,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881014825] [2020-10-27 05:34:37,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:37,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:34:37,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880706383] [2020-10-27 05:34:37,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:34:37,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:37,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:34:37,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:34:37,970 INFO L87 Difference]: Start difference. First operand 677 states and 923 transitions. Second operand 13 states. [2020-10-27 05:34:39,631 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2020-10-27 05:34:42,856 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:34:43,858 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:34:44,650 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-27 05:34:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:46,689 INFO L93 Difference]: Finished difference Result 2427 states and 3423 transitions. [2020-10-27 05:34:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:34:46,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-27 05:34:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:46,698 INFO L225 Difference]: With dead ends: 2427 [2020-10-27 05:34:46,698 INFO L226 Difference]: Without dead ends: 1874 [2020-10-27 05:34:46,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:34:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-10-27 05:34:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 821. [2020-10-27 05:34:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-10-27 05:34:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1130 transitions. [2020-10-27 05:34:46,819 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1130 transitions. Word has length 59 [2020-10-27 05:34:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:46,819 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 1130 transitions. [2020-10-27 05:34:46,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:34:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1130 transitions. [2020-10-27 05:34:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:34:46,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:46,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:46,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:34:46,821 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash 290063534, now seen corresponding path program 1 times [2020-10-27 05:34:46,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:46,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982229275] [2020-10-27 05:34:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:46,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:46,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:47,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:47,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:47,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:47,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:48,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:49,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:49,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:49,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:50,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:50,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:51,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:34:51,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:34:51,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:34:51,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:34:51,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:51,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:34:51,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:52,922 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:34:52,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:52,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:52,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:52,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:52,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:52,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:34:52,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:52,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:52,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982229275] [2020-10-27 05:34:52,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:52,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:34:52,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276406591] [2020-10-27 05:34:52,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:34:52,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:52,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:34:52,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:34:52,991 INFO L87 Difference]: Start difference. First operand 821 states and 1130 transitions. Second operand 15 states. [2020-10-27 05:34:53,122 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-27 05:34:54,784 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 341 DAG size of output: 336 [2020-10-27 05:34:56,832 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 05:34:59,072 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 323 DAG size of output: 320 [2020-10-27 05:34:59,979 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-27 05:35:00,885 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:35:01,666 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:35:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:03,884 INFO L93 Difference]: Finished difference Result 2244 states and 3175 transitions. [2020-10-27 05:35:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:35:03,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-27 05:35:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:03,892 INFO L225 Difference]: With dead ends: 2244 [2020-10-27 05:35:03,892 INFO L226 Difference]: Without dead ends: 1614 [2020-10-27 05:35:03,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:35:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2020-10-27 05:35:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 958. [2020-10-27 05:35:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2020-10-27 05:35:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1331 transitions. [2020-10-27 05:35:04,026 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1331 transitions. Word has length 59 [2020-10-27 05:35:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:04,026 INFO L481 AbstractCegarLoop]: Abstraction has 958 states and 1331 transitions. [2020-10-27 05:35:04,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:35:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1331 transitions. [2020-10-27 05:35:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:35:04,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:04,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:04,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:35:04,029 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1864940519, now seen corresponding path program 1 times [2020-10-27 05:35:04,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:04,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451181313] [2020-10-27 05:35:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:04,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:04,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:04,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:08,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:08,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:35:08,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:35:08,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4609 [2020-10-27 05:35:08,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:08,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:35:08,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:35:08,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:35:08,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:09,688 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:35:09,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:09,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:09,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:09,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:09,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:09,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:35:09,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:09,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451181313] [2020-10-27 05:35:09,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:09,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:35:09,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038561182] [2020-10-27 05:35:09,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:35:09,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:09,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:35:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:35:09,783 INFO L87 Difference]: Start difference. First operand 958 states and 1331 transitions. Second operand 9 states. [2020-10-27 05:35:10,676 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2020-10-27 05:35:13,291 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2020-10-27 05:35:14,268 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-10-27 05:35:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:15,963 INFO L93 Difference]: Finished difference Result 4055 states and 5920 transitions. [2020-10-27 05:35:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:35:15,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-27 05:35:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:15,986 INFO L225 Difference]: With dead ends: 4055 [2020-10-27 05:35:15,986 INFO L226 Difference]: Without dead ends: 4050 [2020-10-27 05:35:15,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:35:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2020-10-27 05:35:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 954. [2020-10-27 05:35:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2020-10-27 05:35:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1327 transitions. [2020-10-27 05:35:16,193 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1327 transitions. Word has length 59 [2020-10-27 05:35:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:16,193 INFO L481 AbstractCegarLoop]: Abstraction has 954 states and 1327 transitions. [2020-10-27 05:35:16,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:35:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1327 transitions. [2020-10-27 05:35:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:35:16,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:16,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:16,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:35:16,196 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:16,196 INFO L82 PathProgramCache]: Analyzing trace with hash -336201169, now seen corresponding path program 1 times [2020-10-27 05:35:16,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:16,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026247383] [2020-10-27 05:35:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:16,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:20,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:20,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:35:20,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:35:20,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3872 [2020-10-27 05:35:20,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:20,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:35:20,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:35:20,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:35:20,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:21,036 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:35:21,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:21,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:21,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:21,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:21,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:21,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:35:21,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:21,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:21,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:21,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:21,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:21,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026247383] [2020-10-27 05:35:21,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:21,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:35:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639050841] [2020-10-27 05:35:21,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:35:21,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:35:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:35:21,097 INFO L87 Difference]: Start difference. First operand 954 states and 1327 transitions. Second operand 9 states. [2020-10-27 05:35:22,020 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-10-27 05:35:24,287 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2020-10-27 05:35:25,106 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-27 05:35:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:26,582 INFO L93 Difference]: Finished difference Result 2374 states and 3423 transitions. [2020-10-27 05:35:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:35:26,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-27 05:35:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:26,592 INFO L225 Difference]: With dead ends: 2374 [2020-10-27 05:35:26,592 INFO L226 Difference]: Without dead ends: 1916 [2020-10-27 05:35:26,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:35:26,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2020-10-27 05:35:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 943. [2020-10-27 05:35:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2020-10-27 05:35:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1310 transitions. [2020-10-27 05:35:26,817 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1310 transitions. Word has length 59 [2020-10-27 05:35:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:26,818 INFO L481 AbstractCegarLoop]: Abstraction has 943 states and 1310 transitions. [2020-10-27 05:35:26,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:35:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1310 transitions. [2020-10-27 05:35:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:35:26,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:26,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:26,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:35:26,821 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:26,821 INFO L82 PathProgramCache]: Analyzing trace with hash 972812940, now seen corresponding path program 1 times [2020-10-27 05:35:26,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:26,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504005625] [2020-10-27 05:35:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:26,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:26,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:27,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:27,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:27,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:30,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:30,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:35:30,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:35:30,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4067 [2020-10-27 05:35:30,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:30,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:35:30,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:35:30,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:35:30,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:31,158 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 05:35:31,300 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 05:35:31,442 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-27 05:35:31,575 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-27 05:35:32,550 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:35:32,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:32,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:32,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:32,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:32,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:35:32,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:32,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:32,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:32,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:32,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:32,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504005625] [2020-10-27 05:35:32,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:32,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:35:32,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599237714] [2020-10-27 05:35:32,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:35:32,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:35:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:35:32,613 INFO L87 Difference]: Start difference. First operand 943 states and 1310 transitions. Second operand 12 states. [2020-10-27 05:35:33,510 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-27 05:35:37,085 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 05:35:39,738 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 05:35:40,586 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:35:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:41,562 INFO L93 Difference]: Finished difference Result 4061 states and 5919 transitions. [2020-10-27 05:35:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:35:41,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-27 05:35:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:41,579 INFO L225 Difference]: With dead ends: 4061 [2020-10-27 05:35:41,579 INFO L226 Difference]: Without dead ends: 4056 [2020-10-27 05:35:41,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:35:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2020-10-27 05:35:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 912. [2020-10-27 05:35:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 912 states. [2020-10-27 05:35:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1264 transitions. [2020-10-27 05:35:41,812 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1264 transitions. Word has length 59 [2020-10-27 05:35:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:41,813 INFO L481 AbstractCegarLoop]: Abstraction has 912 states and 1264 transitions. [2020-10-27 05:35:41,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:35:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1264 transitions. [2020-10-27 05:35:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:35:41,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:41,815 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:41,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:35:41,815 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:41,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1913619004, now seen corresponding path program 1 times [2020-10-27 05:35:41,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:41,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200004085] [2020-10-27 05:35:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:41,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:41,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:42,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:42,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:42,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:42,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:43,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:43,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:44,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:44,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:44,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:45,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:45,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:46,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:46,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:46,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:46,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:35:46,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:35:46,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:35:46,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:35:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:35:46,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:47,921 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:35:47,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:47,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:47,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:47,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:47,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:47,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:35:47,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:47,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:47,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:47,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:47,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:48,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200004085] [2020-10-27 05:35:48,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:48,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:35:48,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388937317] [2020-10-27 05:35:48,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:35:48,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:48,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:35:48,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:35:48,010 INFO L87 Difference]: Start difference. First operand 912 states and 1264 transitions. Second operand 17 states. [2020-10-27 05:35:48,148 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-27 05:35:49,942 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 345 DAG size of output: 338 [2020-10-27 05:35:54,057 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2020-10-27 05:35:57,632 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 329 DAG size of output: 322 [2020-10-27 05:35:59,319 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2020-10-27 05:36:00,063 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-27 05:36:01,069 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-10-27 05:36:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:01,821 INFO L93 Difference]: Finished difference Result 2554 states and 3668 transitions. [2020-10-27 05:36:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:36:01,822 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-10-27 05:36:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:01,832 INFO L225 Difference]: With dead ends: 2554 [2020-10-27 05:36:01,833 INFO L226 Difference]: Without dead ends: 2549 [2020-10-27 05:36:01,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 05:36:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2020-10-27 05:36:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 901. [2020-10-27 05:36:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 901 states. [2020-10-27 05:36:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1245 transitions. [2020-10-27 05:36:02,029 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1245 transitions. Word has length 60 [2020-10-27 05:36:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:02,029 INFO L481 AbstractCegarLoop]: Abstraction has 901 states and 1245 transitions. [2020-10-27 05:36:02,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:36:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1245 transitions. [2020-10-27 05:36:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:36:02,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:02,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:02,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:36:02,031 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:02,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1930296210, now seen corresponding path program 1 times [2020-10-27 05:36:02,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:02,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633259514] [2020-10-27 05:36:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:02,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:02,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:02,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:02,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:06,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:06,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:36:06,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:36:06,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4310 [2020-10-27 05:36:06,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:06,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:36:06,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:06,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:36:06,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:07,696 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:07,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:07,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:07,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:07,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:07,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:07,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:36:07,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:07,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:07,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:07,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:07,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:07,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633259514] [2020-10-27 05:36:07,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:07,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:36:07,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490930959] [2020-10-27 05:36:07,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:36:07,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:36:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:36:07,753 INFO L87 Difference]: Start difference. First operand 901 states and 1245 transitions. Second operand 13 states. [2020-10-27 05:36:08,714 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2020-10-27 05:36:09,199 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-27 05:36:09,542 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-27 05:36:15,081 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 331 DAG size of output: 329 [2020-10-27 05:36:15,985 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-27 05:36:17,023 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2020-10-27 05:36:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:17,780 INFO L93 Difference]: Finished difference Result 2634 states and 3792 transitions. [2020-10-27 05:36:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:36:17,781 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-27 05:36:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:17,794 INFO L225 Difference]: With dead ends: 2634 [2020-10-27 05:36:17,794 INFO L226 Difference]: Without dead ends: 2629 [2020-10-27 05:36:17,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:36:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2020-10-27 05:36:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 879. [2020-10-27 05:36:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-10-27 05:36:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1211 transitions. [2020-10-27 05:36:18,084 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1211 transitions. Word has length 61 [2020-10-27 05:36:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:18,084 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1211 transitions. [2020-10-27 05:36:18,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:36:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1211 transitions. [2020-10-27 05:36:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:36:18,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:18,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:18,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:36:18,088 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash 280986920, now seen corresponding path program 1 times [2020-10-27 05:36:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:18,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819429849] [2020-10-27 05:36:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:18,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:18,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:18,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:18,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:18,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:18,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:18,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:23,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:23,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:36:23,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:36:23,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:36:23,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:23,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:23,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:23,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:36:23,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:23,907 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:23,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:23,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:23,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:23,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:23,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:23,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:36:23,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:23,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:23,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819429849] [2020-10-27 05:36:23,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:23,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:36:23,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197482179] [2020-10-27 05:36:23,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:23,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:23,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:23,976 INFO L87 Difference]: Start difference. First operand 879 states and 1211 transitions. Second operand 6 states. [2020-10-27 05:36:24,757 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-27 05:36:26,971 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:36:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:27,191 INFO L93 Difference]: Finished difference Result 1675 states and 2378 transitions. [2020-10-27 05:36:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:36:27,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-27 05:36:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:27,196 INFO L225 Difference]: With dead ends: 1675 [2020-10-27 05:36:27,196 INFO L226 Difference]: Without dead ends: 1060 [2020-10-27 05:36:27,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:36:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2020-10-27 05:36:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1057. [2020-10-27 05:36:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2020-10-27 05:36:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1479 transitions. [2020-10-27 05:36:27,431 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1479 transitions. Word has length 73 [2020-10-27 05:36:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:27,431 INFO L481 AbstractCegarLoop]: Abstraction has 1057 states and 1479 transitions. [2020-10-27 05:36:27,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1479 transitions. [2020-10-27 05:36:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:36:27,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:27,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:27,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:36:27,434 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:27,435 INFO L82 PathProgramCache]: Analyzing trace with hash 930457893, now seen corresponding path program 1 times [2020-10-27 05:36:27,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:27,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821822577] [2020-10-27 05:36:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:27,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:27,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:27,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:27,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:28,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:28,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:32,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:32,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:36:32,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:36:32,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:36:32,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:32,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:32,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:36:32,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:36:32,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:33,284 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:33,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:33,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:33,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:33,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:33,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:36:33,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:33,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:33,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821822577] [2020-10-27 05:36:33,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:33,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:36:33,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732500435] [2020-10-27 05:36:33,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:33,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:33,334 INFO L87 Difference]: Start difference. First operand 1057 states and 1479 transitions. Second operand 6 states. [2020-10-27 05:36:36,151 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:36:36,926 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-27 05:36:37,672 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-27 05:36:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:38,155 INFO L93 Difference]: Finished difference Result 3045 states and 4394 transitions. [2020-10-27 05:36:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:36:38,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-27 05:36:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:38,160 INFO L225 Difference]: With dead ends: 3045 [2020-10-27 05:36:38,161 INFO L226 Difference]: Without dead ends: 2263 [2020-10-27 05:36:38,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2020-10-27 05:36:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2043. [2020-10-27 05:36:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2043 states. [2020-10-27 05:36:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 2908 transitions. [2020-10-27 05:36:38,709 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 2908 transitions. Word has length 73 [2020-10-27 05:36:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:38,709 INFO L481 AbstractCegarLoop]: Abstraction has 2043 states and 2908 transitions. [2020-10-27 05:36:38,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 2908 transitions. [2020-10-27 05:36:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:36:38,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:38,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:38,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:36:38,713 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:38,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:38,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1628320916, now seen corresponding path program 1 times [2020-10-27 05:36:38,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:38,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379091153] [2020-10-27 05:36:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:38,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:38,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:38,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:38,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:39,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:39,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:39,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:43,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:43,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:36:43,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:36:43,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:36:43,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:43,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:43,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:43,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:36:43,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:44,580 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:44,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:44,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:44,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:44,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:44,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:44,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:36:44,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:44,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:44,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:44,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:44,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:44,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379091153] [2020-10-27 05:36:44,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:44,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:36:44,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48998545] [2020-10-27 05:36:44,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:44,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:44,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:44,659 INFO L87 Difference]: Start difference. First operand 2043 states and 2908 transitions. Second operand 6 states. [2020-10-27 05:36:45,502 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:36:47,849 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:36:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:48,376 INFO L93 Difference]: Finished difference Result 4988 states and 7231 transitions. [2020-10-27 05:36:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:36:48,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-27 05:36:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:48,385 INFO L225 Difference]: With dead ends: 4988 [2020-10-27 05:36:48,385 INFO L226 Difference]: Without dead ends: 3132 [2020-10-27 05:36:48,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2020-10-27 05:36:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3129. [2020-10-27 05:36:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2020-10-27 05:36:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4516 transitions. [2020-10-27 05:36:49,168 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4516 transitions. Word has length 73 [2020-10-27 05:36:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:49,168 INFO L481 AbstractCegarLoop]: Abstraction has 3129 states and 4516 transitions. [2020-10-27 05:36:49,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4516 transitions. [2020-10-27 05:36:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:36:49,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:49,172 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:49,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:36:49,173 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1190576947, now seen corresponding path program 1 times [2020-10-27 05:36:49,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:49,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142535564] [2020-10-27 05:36:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:49,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:49,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:49,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:49,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:50,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:50,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:54,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:54,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:36:54,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:36:54,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:36:54,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:36:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:54,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:36:54,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:55,039 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:55,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:55,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:55,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:55,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:55,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:36:55,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:55,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:55,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:55,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:55,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142535564] [2020-10-27 05:36:55,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:55,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:36:55,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593782618] [2020-10-27 05:36:55,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:36:55,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:55,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:36:55,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:36:55,107 INFO L87 Difference]: Start difference. First operand 3129 states and 4516 transitions. Second operand 10 states. [2020-10-27 05:36:55,966 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 320