/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:18:24,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:18:24,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:18:24,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:18:24,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:18:24,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:18:24,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:18:24,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:18:24,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:18:24,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:18:24,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:18:24,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:18:24,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:18:24,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:18:24,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:18:24,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:18:24,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:18:24,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:18:24,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:18:24,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:18:24,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:18:24,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:18:24,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:18:24,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:18:24,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:18:24,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:18:24,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:18:24,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:18:24,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:18:24,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:18:24,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:18:24,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:18:24,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:18:24,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:18:24,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:18:24,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:18:24,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:18:24,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:18:24,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:18:24,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:18:24,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:18:24,822 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 [2020-10-29 13:18:24,866 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:18:24,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:18:24,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:18:24,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:18:24,872 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:18:24,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:18:24,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:18:24,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:18:24,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:18:24,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:18:24,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:18:24,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:18:24,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:18:24,877 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:18:24,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:18:24,877 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:18:24,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:18:24,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:18:24,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:18:24,878 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:18:24,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:18:24,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:18:24,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:18:24,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:18:24,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:18:24,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:18:24,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:18:24,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:18:24,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:18:24,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:18:25,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:18:25,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:18:25,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:18:25,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:18:25,338 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:18:25,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:18:25,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af68dd080/b82af5f9723b49b7aab59e9f3d572f34/FLAG359075f65 [2020-10-29 13:18:26,060 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:18:26,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:18:26,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af68dd080/b82af5f9723b49b7aab59e9f3d572f34/FLAG359075f65 [2020-10-29 13:18:26,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af68dd080/b82af5f9723b49b7aab59e9f3d572f34 [2020-10-29 13:18:26,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:18:26,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:18:26,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:26,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:18:26,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:18:26,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec3f403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26, skipping insertion in model container [2020-10-29 13:18:26,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:18:26,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:18:26,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:26,798 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:18:26,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:18:26,877 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:18:26,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26 WrapperNode [2020-10-29 13:18:26,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:18:26,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:18:26,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:18:26,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:18:26,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (1/1) ... [2020-10-29 13:18:26,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:18:26,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:18:26,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:18:26,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:18:26,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (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 [2020-10-29 13:18:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:18:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:18:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:18:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:18:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:18:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:18:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:18:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:18:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:18:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:18:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:18:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:18:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:18:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:18:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:18:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:18:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:18:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:18:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:18:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:18:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:18:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:18:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:18:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:18:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:18:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:18:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:18:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:18:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:18:27,996 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:18:27,996 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:18:27,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:27 BoogieIcfgContainer [2020-10-29 13:18:27,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:18:28,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:18:28,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:18:28,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:18:28,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:18:26" (1/3) ... [2020-10-29 13:18:28,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c66632a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:28, skipping insertion in model container [2020-10-29 13:18:28,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:18:26" (2/3) ... [2020-10-29 13:18:28,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c66632a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:18:28, skipping insertion in model container [2020-10-29 13:18:28,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:18:27" (3/3) ... [2020-10-29 13:18:28,011 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:18:28,022 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:18:28,026 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:18:28,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:18:28,060 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:18:28,060 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:18:28,060 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:18:28,061 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:18:28,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:18:28,061 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:18:28,061 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:18:28,061 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:18:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-10-29 13:18:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:18:28,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:28,090 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] [2020-10-29 13:18:28,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1579954712, now seen corresponding path program 1 times [2020-10-29 13:18:28,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:28,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750699696] [2020-10-29 13:18:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:28,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:28,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:28,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:29,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:29,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:33,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:33,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:18:33,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:18:33,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:18:33,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:33,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:18:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:33,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:18:33,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:18:33,793 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:18:33,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:33,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:33,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:33,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:33,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:33,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-29 13:18:33,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:33,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:33,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750699696] [2020-10-29 13:18:33,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:33,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:18:33,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280072240] [2020-10-29 13:18:33,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:18:33,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:18:33,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:18:33,956 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 6 states. [2020-10-29 13:18:34,263 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:34,758 INFO L93 Difference]: Finished difference Result 155 states and 238 transitions. [2020-10-29 13:18:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:18:34,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-29 13:18:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:34,772 INFO L225 Difference]: With dead ends: 155 [2020-10-29 13:18:34,773 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 13:18:34,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:18:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 13:18:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-29 13:18:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 13:18:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 112 transitions. [2020-10-29 13:18:34,835 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 112 transitions. Word has length 53 [2020-10-29 13:18:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:34,836 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 112 transitions. [2020-10-29 13:18:34,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:18:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 112 transitions. [2020-10-29 13:18:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:18:34,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:34,840 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] [2020-10-29 13:18:34,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:18:34,840 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1451869405, now seen corresponding path program 1 times [2020-10-29 13:18:34,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:34,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936323754] [2020-10-29 13:18:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:34,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:34,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:35,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:37,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:18:37,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:18:37,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2136 [2020-10-29 13:18:37,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:37,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:37,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:37,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:18:37,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:18:37,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 13:18:37,357 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:18:37,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:37,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:37,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:37,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:37,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:37,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:18:37,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:37,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:37,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:37,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:37,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936323754] [2020-10-29 13:18:37,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:37,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:37,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526019115] [2020-10-29 13:18:37,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:37,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:37,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:37,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:37,419 INFO L87 Difference]: Start difference. First operand 83 states and 112 transitions. Second operand 7 states. [2020-10-29 13:18:37,690 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:18:38,346 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:38,573 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:18:38,788 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:18:39,039 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:39,293 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:18:39,490 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:39,567 INFO L93 Difference]: Finished difference Result 507 states and 768 transitions. [2020-10-29 13:18:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:18:39,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-29 13:18:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:39,573 INFO L225 Difference]: With dead ends: 507 [2020-10-29 13:18:39,573 INFO L226 Difference]: Without dead ends: 454 [2020-10-29 13:18:39,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:18:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-29 13:18:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 133. [2020-10-29 13:18:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 13:18:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 190 transitions. [2020-10-29 13:18:39,630 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 190 transitions. Word has length 53 [2020-10-29 13:18:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:39,632 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 190 transitions. [2020-10-29 13:18:39,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 190 transitions. [2020-10-29 13:18:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:18:39,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:39,637 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] [2020-10-29 13:18:39,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:18:39,637 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:39,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:39,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1075904142, now seen corresponding path program 1 times [2020-10-29 13:18:39,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:39,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534531908] [2020-10-29 13:18:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:39,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:39,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:39,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:40,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:44,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:44,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:18:44,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:18:44,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:18:44,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:44,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:44,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:44,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:44,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:18:44,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:45,062 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:18:45,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:45,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:45,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:45,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:45,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:45,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:18:45,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:45,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:45,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:45,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:45,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:45,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:18:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:45,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534531908] [2020-10-29 13:18:45,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:45,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:18:45,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362409758] [2020-10-29 13:18:45,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:45,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:45,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:45,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:45,125 INFO L87 Difference]: Start difference. First operand 133 states and 190 transitions. Second operand 7 states. [2020-10-29 13:18:45,331 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:18:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:45,972 INFO L93 Difference]: Finished difference Result 390 states and 588 transitions. [2020-10-29 13:18:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:18:45,973 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-29 13:18:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:45,977 INFO L225 Difference]: With dead ends: 390 [2020-10-29 13:18:45,977 INFO L226 Difference]: Without dead ends: 287 [2020-10-29 13:18:45,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:18:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-29 13:18:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 192. [2020-10-29 13:18:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-29 13:18:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 281 transitions. [2020-10-29 13:18:46,037 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 281 transitions. Word has length 55 [2020-10-29 13:18:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:46,038 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 281 transitions. [2020-10-29 13:18:46,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 281 transitions. [2020-10-29 13:18:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:18:46,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:46,042 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] [2020-10-29 13:18:46,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:18:46,043 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1305816760, now seen corresponding path program 1 times [2020-10-29 13:18:46,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:46,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848224103] [2020-10-29 13:18:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:47,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:47,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:18:47,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:18:47,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1505 [2020-10-29 13:18:47,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:47,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:47,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:47,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:18:47,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:18:47,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:47,789 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:18:47,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:47,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:47,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:47,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:47,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:18:47,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:47,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:47,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848224103] [2020-10-29 13:18:47,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:47,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:18:47,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747981891] [2020-10-29 13:18:47,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:18:47,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:18:47,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:18:47,826 INFO L87 Difference]: Start difference. First operand 192 states and 281 transitions. Second operand 4 states. [2020-10-29 13:18:48,025 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:18:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:48,364 INFO L93 Difference]: Finished difference Result 476 states and 720 transitions. [2020-10-29 13:18:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:18:48,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-29 13:18:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:48,367 INFO L225 Difference]: With dead ends: 476 [2020-10-29 13:18:48,367 INFO L226 Difference]: Without dead ends: 321 [2020-10-29 13:18:48,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:18:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-29 13:18:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-10-29 13:18:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-29 13:18:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 469 transitions. [2020-10-29 13:18:48,411 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 469 transitions. Word has length 55 [2020-10-29 13:18:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:48,412 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 469 transitions. [2020-10-29 13:18:48,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:18:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 469 transitions. [2020-10-29 13:18:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:18:48,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:48,414 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] [2020-10-29 13:18:48,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:18:48,414 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash -684287127, now seen corresponding path program 1 times [2020-10-29 13:18:48,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:48,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979914154] [2020-10-29 13:18:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:48,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:48,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:50,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:18:50,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:18:50,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1680 [2020-10-29 13:18:50,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:50,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:50,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:50,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:18:50,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:18:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:50,406 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:18:50,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:50,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:50,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:50,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:50,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:50,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:18:50,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:50,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:50,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:50,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:50,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:50,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:50,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979914154] [2020-10-29 13:18:50,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:50,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:18:50,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600068466] [2020-10-29 13:18:50,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:50,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:50,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:50,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:50,454 INFO L87 Difference]: Start difference. First operand 316 states and 469 transitions. Second operand 7 states. [2020-10-29 13:18:50,746 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:18:51,375 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:51,575 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:18:51,873 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:52,097 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:18:52,307 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:18:52,615 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:18:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:52,638 INFO L93 Difference]: Finished difference Result 1023 states and 1544 transitions. [2020-10-29 13:18:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:18:52,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-29 13:18:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:52,649 INFO L225 Difference]: With dead ends: 1023 [2020-10-29 13:18:52,649 INFO L226 Difference]: Without dead ends: 833 [2020-10-29 13:18:52,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:18:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2020-10-29 13:18:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 316. [2020-10-29 13:18:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-29 13:18:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 467 transitions. [2020-10-29 13:18:52,705 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 467 transitions. Word has length 55 [2020-10-29 13:18:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:52,705 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 467 transitions. [2020-10-29 13:18:52,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 467 transitions. [2020-10-29 13:18:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:18:52,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:52,707 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] [2020-10-29 13:18:52,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:18:52,707 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:52,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1812006024, now seen corresponding path program 1 times [2020-10-29 13:18:52,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:52,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809898522] [2020-10-29 13:18:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:52,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:52,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:52,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:53,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:56,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:56,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:18:56,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:18:56,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3836 [2020-10-29 13:18:56,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:56,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:18:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:18:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:18:56,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:56,844 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:18:56,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:56,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:56,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:56,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:56,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:56,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:18:56,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:56,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:18:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:18:56,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:56,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809898522] [2020-10-29 13:18:56,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:56,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:18:56,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788878287] [2020-10-29 13:18:56,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:18:56,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:18:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:18:56,912 INFO L87 Difference]: Start difference. First operand 316 states and 467 transitions. Second operand 7 states. [2020-10-29 13:18:57,148 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:18:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:57,840 INFO L93 Difference]: Finished difference Result 722 states and 1078 transitions. [2020-10-29 13:18:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:18:57,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-29 13:18:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:57,845 INFO L225 Difference]: With dead ends: 722 [2020-10-29 13:18:57,845 INFO L226 Difference]: Without dead ends: 508 [2020-10-29 13:18:57,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:18:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-10-29 13:18:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 308. [2020-10-29 13:18:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-29 13:18:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 447 transitions. [2020-10-29 13:18:57,890 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 447 transitions. Word has length 55 [2020-10-29 13:18:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:57,891 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 447 transitions. [2020-10-29 13:18:57,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:18:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 447 transitions. [2020-10-29 13:18:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:18:57,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:57,892 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] [2020-10-29 13:18:57,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:18:57,892 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -475406850, now seen corresponding path program 1 times [2020-10-29 13:18:57,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:57,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976814748] [2020-10-29 13:18:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:57,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:58,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:01,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:01,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:19:01,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:19:01,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3514 [2020-10-29 13:19:01,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:01,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:01,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:19:01,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:01,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:19:01,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:01,792 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:01,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:01,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:01,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:01,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:01,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:01,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:19:01,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:01,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:01,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:01,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:01,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:01,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:19:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:01,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976814748] [2020-10-29 13:19:01,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:01,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:19:01,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784336463] [2020-10-29 13:19:01,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:19:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:19:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:19:01,865 INFO L87 Difference]: Start difference. First operand 308 states and 447 transitions. Second operand 7 states. [2020-10-29 13:19:02,135 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:02,726 INFO L93 Difference]: Finished difference Result 774 states and 1150 transitions. [2020-10-29 13:19:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:19:02,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-29 13:19:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:02,730 INFO L225 Difference]: With dead ends: 774 [2020-10-29 13:19:02,730 INFO L226 Difference]: Without dead ends: 530 [2020-10-29 13:19:02,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:19:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-29 13:19:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 290. [2020-10-29 13:19:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-29 13:19:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 416 transitions. [2020-10-29 13:19:02,770 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 416 transitions. Word has length 55 [2020-10-29 13:19:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:02,771 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 416 transitions. [2020-10-29 13:19:02,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:19:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 416 transitions. [2020-10-29 13:19:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:19:02,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:02,774 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] [2020-10-29 13:19:02,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:19:02,774 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:02,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash 752482481, now seen corresponding path program 1 times [2020-10-29 13:19:02,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:02,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695380024] [2020-10-29 13:19:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:02,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:07,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:07,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:19:07,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:19:07,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:19:07,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:07,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:07,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:19:07,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:19:07,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:19:07,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:08,041 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:08,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:08,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:08,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:08,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:08,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:08,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:19:08,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:08,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:08,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695380024] [2020-10-29 13:19:08,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:08,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:19:08,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072423327] [2020-10-29 13:19:08,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:19:08,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:08,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:19:08,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:19:08,086 INFO L87 Difference]: Start difference. First operand 290 states and 416 transitions. Second operand 7 states. [2020-10-29 13:19:08,333 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:09,104 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:19:09,295 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:19:09,549 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:09,760 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:19:09,977 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:19:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:10,109 INFO L93 Difference]: Finished difference Result 1291 states and 1939 transitions. [2020-10-29 13:19:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:19:10,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-29 13:19:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:10,115 INFO L225 Difference]: With dead ends: 1291 [2020-10-29 13:19:10,116 INFO L226 Difference]: Without dead ends: 1101 [2020-10-29 13:19:10,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:19:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-10-29 13:19:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 521. [2020-10-29 13:19:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-29 13:19:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 770 transitions. [2020-10-29 13:19:10,197 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 770 transitions. Word has length 56 [2020-10-29 13:19:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:10,197 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 770 transitions. [2020-10-29 13:19:10,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:19:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 770 transitions. [2020-10-29 13:19:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:19:10,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:10,199 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] [2020-10-29 13:19:10,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:19:10,199 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:10,199 INFO L82 PathProgramCache]: Analyzing trace with hash -924376843, now seen corresponding path program 1 times [2020-10-29 13:19:10,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:10,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140112828] [2020-10-29 13:19:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:10,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:10,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:11,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:12,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:12,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:19:12,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:19:12,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2125 [2020-10-29 13:19:12,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:12,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:19:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:19:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:19:12,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:12,600 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:12,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:12,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:12,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:12,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:12,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:12,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:19:12,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:12,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:12,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:12,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:12,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:12,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:12,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140112828] [2020-10-29 13:19:12,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:12,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:12,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658082319] [2020-10-29 13:19:12,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:19:12,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:19:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:19:12,639 INFO L87 Difference]: Start difference. First operand 521 states and 770 transitions. Second operand 5 states. [2020-10-29 13:19:12,889 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:19:13,488 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:19:13,720 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:14,014 INFO L93 Difference]: Finished difference Result 1017 states and 1532 transitions. [2020-10-29 13:19:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:19:14,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-29 13:19:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:14,021 INFO L225 Difference]: With dead ends: 1017 [2020-10-29 13:19:14,021 INFO L226 Difference]: Without dead ends: 768 [2020-10-29 13:19:14,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-29 13:19:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 757. [2020-10-29 13:19:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2020-10-29 13:19:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1126 transitions. [2020-10-29 13:19:14,173 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1126 transitions. Word has length 56 [2020-10-29 13:19:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:14,173 INFO L481 AbstractCegarLoop]: Abstraction has 757 states and 1126 transitions. [2020-10-29 13:19:14,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:19:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1126 transitions. [2020-10-29 13:19:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:19:14,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:14,175 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] [2020-10-29 13:19:14,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:19:14,175 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash 202603403, now seen corresponding path program 1 times [2020-10-29 13:19:14,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:14,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095812540] [2020-10-29 13:19:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:14,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:14,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:14,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:19:14,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:19:14,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-29 13:19:14,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:14,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:19:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 13:19:14,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:15,093 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:15,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:15,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:15,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:15,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:15,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:15,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:19:15,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:15,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:15,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095812540] [2020-10-29 13:19:15,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:15,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:19:15,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387965449] [2020-10-29 13:19:15,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:19:15,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:19:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:19:15,126 INFO L87 Difference]: Start difference. First operand 757 states and 1126 transitions. Second operand 4 states. [2020-10-29 13:19:15,334 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:19:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:15,866 INFO L93 Difference]: Finished difference Result 1992 states and 2989 transitions. [2020-10-29 13:19:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:19:15,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-29 13:19:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:15,874 INFO L225 Difference]: With dead ends: 1992 [2020-10-29 13:19:15,874 INFO L226 Difference]: Without dead ends: 1296 [2020-10-29 13:19:15,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:19:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2020-10-29 13:19:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1293. [2020-10-29 13:19:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1293 states. [2020-10-29 13:19:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1919 transitions. [2020-10-29 13:19:16,071 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1919 transitions. Word has length 56 [2020-10-29 13:19:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:16,071 INFO L481 AbstractCegarLoop]: Abstraction has 1293 states and 1919 transitions. [2020-10-29 13:19:16,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:19:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1919 transitions. [2020-10-29 13:19:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:19:16,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:16,072 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] [2020-10-29 13:19:16,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:19:16,073 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1181658993, now seen corresponding path program 1 times [2020-10-29 13:19:16,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:16,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231511791] [2020-10-29 13:19:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:16,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:19:16,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:19:16,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-29 13:19:16,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 13:19:16,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:19:16,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,649 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:16,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:16,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:16,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:16,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:16,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:19:16,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:16,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:16,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:16,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231511791] [2020-10-29 13:19:16,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:16,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:19:16,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48437771] [2020-10-29 13:19:16,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:19:16,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:16,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:19:16,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:19:16,683 INFO L87 Difference]: Start difference. First operand 1293 states and 1919 transitions. Second operand 4 states. [2020-10-29 13:19:16,890 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:19:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:17,570 INFO L93 Difference]: Finished difference Result 3467 states and 5159 transitions. [2020-10-29 13:19:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:19:17,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-29 13:19:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:17,582 INFO L225 Difference]: With dead ends: 3467 [2020-10-29 13:19:17,582 INFO L226 Difference]: Without dead ends: 2265 [2020-10-29 13:19:17,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:19:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-10-29 13:19:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2241. [2020-10-29 13:19:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2241 states. [2020-10-29 13:19:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3294 transitions. [2020-10-29 13:19:17,921 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3294 transitions. Word has length 57 [2020-10-29 13:19:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:17,921 INFO L481 AbstractCegarLoop]: Abstraction has 2241 states and 3294 transitions. [2020-10-29 13:19:17,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:19:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3294 transitions. [2020-10-29 13:19:17,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:19:17,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:17,923 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] [2020-10-29 13:19:17,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:19:17,924 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:17,925 INFO L82 PathProgramCache]: Analyzing trace with hash 771140620, now seen corresponding path program 1 times [2020-10-29 13:19:17,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:17,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206767226] [2020-10-29 13:19:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:17,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:17,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:18,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:19:18,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:19:18,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-29 13:19:18,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:18,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:18,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:18,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:18,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:19:18,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:18,766 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:18,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:18,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:18,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:18,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:18,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:18,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:19:18,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:18,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:18,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206767226] [2020-10-29 13:19:18,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:18,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:18,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375110980] [2020-10-29 13:19:18,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:18,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:18,802 INFO L87 Difference]: Start difference. First operand 2241 states and 3294 transitions. Second operand 6 states. [2020-10-29 13:19:19,042 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:19:19,702 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:19:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:20,142 INFO L93 Difference]: Finished difference Result 6555 states and 9658 transitions. [2020-10-29 13:19:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:19:20,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:19:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:20,165 INFO L225 Difference]: With dead ends: 6555 [2020-10-29 13:19:20,165 INFO L226 Difference]: Without dead ends: 4384 [2020-10-29 13:19:20,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:19:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2020-10-29 13:19:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 4381. [2020-10-29 13:19:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4381 states. [2020-10-29 13:19:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 6418 transitions. [2020-10-29 13:19:20,909 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 6418 transitions. Word has length 58 [2020-10-29 13:19:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:20,910 INFO L481 AbstractCegarLoop]: Abstraction has 4381 states and 6418 transitions. [2020-10-29 13:19:20,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 6418 transitions. [2020-10-29 13:19:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:19:20,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:20,911 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] [2020-10-29 13:19:20,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:19:20,911 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1543004273, now seen corresponding path program 1 times [2020-10-29 13:19:20,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:20,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889138893] [2020-10-29 13:19:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:20,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:21,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:21,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:19:21,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:19:21,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-29 13:19:21,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:21,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:19:21,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:19:21,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:21,361 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:21,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:21,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:21,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:21,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:21,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:21,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:19:21,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:21,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:21,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:21,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889138893] [2020-10-29 13:19:21,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:21,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:19:21,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740555621] [2020-10-29 13:19:21,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:19:21,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:21,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:19:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:19:21,392 INFO L87 Difference]: Start difference. First operand 4381 states and 6418 transitions. Second operand 4 states. [2020-10-29 13:19:21,616 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:19:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:22,752 INFO L93 Difference]: Finished difference Result 12107 states and 17630 transitions. [2020-10-29 13:19:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:19:22,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-29 13:19:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:22,787 INFO L225 Difference]: With dead ends: 12107 [2020-10-29 13:19:22,787 INFO L226 Difference]: Without dead ends: 7793 [2020-10-29 13:19:22,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:19:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2020-10-29 13:19:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 7753. [2020-10-29 13:19:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7753 states. [2020-10-29 13:19:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7753 states to 7753 states and 11128 transitions. [2020-10-29 13:19:23,780 INFO L78 Accepts]: Start accepts. Automaton has 7753 states and 11128 transitions. Word has length 58 [2020-10-29 13:19:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:23,780 INFO L481 AbstractCegarLoop]: Abstraction has 7753 states and 11128 transitions. [2020-10-29 13:19:23,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:19:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 7753 states and 11128 transitions. [2020-10-29 13:19:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:19:23,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:23,781 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] [2020-10-29 13:19:23,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:19:23,782 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:23,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:23,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1676079535, now seen corresponding path program 1 times [2020-10-29 13:19:23,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:23,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081822100] [2020-10-29 13:19:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:23,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:23,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:24,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:24,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:19:24,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:19:24,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-29 13:19:24,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:24,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:24,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:24,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:24,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:19:24,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:24,374 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:24,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:24,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:24,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:24,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:24,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:24,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:19:24,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:24,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:24,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:24,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081822100] [2020-10-29 13:19:24,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:24,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:24,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571725806] [2020-10-29 13:19:24,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:24,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:24,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:24,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:24,412 INFO L87 Difference]: Start difference. First operand 7753 states and 11128 transitions. Second operand 6 states. [2020-10-29 13:19:24,662 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:19:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:25,832 INFO L93 Difference]: Finished difference Result 15476 states and 22226 transitions. [2020-10-29 13:19:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:19:25,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-29 13:19:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:25,867 INFO L225 Difference]: With dead ends: 15476 [2020-10-29 13:19:25,867 INFO L226 Difference]: Without dead ends: 7753 [2020-10-29 13:19:25,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:19:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2020-10-29 13:19:26,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 7753. [2020-10-29 13:19:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7753 states. [2020-10-29 13:19:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7753 states to 7753 states and 11016 transitions. [2020-10-29 13:19:26,777 INFO L78 Accepts]: Start accepts. Automaton has 7753 states and 11016 transitions. Word has length 59 [2020-10-29 13:19:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:26,778 INFO L481 AbstractCegarLoop]: Abstraction has 7753 states and 11016 transitions. [2020-10-29 13:19:26,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7753 states and 11016 transitions. [2020-10-29 13:19:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:19:26,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:26,779 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] [2020-10-29 13:19:26,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:19:26,779 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:26,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1557187478, now seen corresponding path program 1 times [2020-10-29 13:19:26,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:26,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12367646] [2020-10-29 13:19:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:26,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:26,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:19:26,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:26,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-29 13:19:26,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:26,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:26,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:19:26,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-29 13:19:26,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:19:26,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:27,132 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:27,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:27,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:27,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:27,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:27,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:27,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:19:27,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:27,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:27,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:27,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:27,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:27,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:27,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12367646] [2020-10-29 13:19:27,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:27,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:19:27,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049569253] [2020-10-29 13:19:27,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:19:27,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:19:27,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:19:27,162 INFO L87 Difference]: Start difference. First operand 7753 states and 11016 transitions. Second operand 5 states. [2020-10-29 13:19:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:28,923 INFO L93 Difference]: Finished difference Result 11778 states and 16731 transitions. [2020-10-29 13:19:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:19:28,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-29 13:19:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:28,950 INFO L225 Difference]: With dead ends: 11778 [2020-10-29 13:19:28,951 INFO L226 Difference]: Without dead ends: 11775 [2020-10-29 13:19:28,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11775 states. [2020-10-29 13:19:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11775 to 7881. [2020-10-29 13:19:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7881 states. [2020-10-29 13:19:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 11080 transitions. [2020-10-29 13:19:29,956 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 11080 transitions. Word has length 59 [2020-10-29 13:19:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:29,956 INFO L481 AbstractCegarLoop]: Abstraction has 7881 states and 11080 transitions. [2020-10-29 13:19:29,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:19:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 11080 transitions. [2020-10-29 13:19:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:19:29,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:29,957 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] [2020-10-29 13:19:29,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:19:29,958 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:29,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:29,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1642375716, now seen corresponding path program 1 times [2020-10-29 13:19:29,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:29,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335559556] [2020-10-29 13:19:29,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:29,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:30,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:30,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:30,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:30,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:19:30,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:19:30,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-29 13:19:30,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:30,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:19:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:19:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:19:30,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:30,708 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:30,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:30,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:30,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:30,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:30,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:30,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:19:30,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:30,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:30,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:19:30,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:30,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:19:30,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:30,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335559556] [2020-10-29 13:19:30,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:19:30,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:19:30,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323674766] [2020-10-29 13:19:30,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:19:30,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:30,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:19:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:19:30,753 INFO L87 Difference]: Start difference. First operand 7881 states and 11080 transitions. Second operand 7 states. [2020-10-29 13:19:30,978 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:33,420 INFO L93 Difference]: Finished difference Result 20489 states and 28816 transitions. [2020-10-29 13:19:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:19:33,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-29 13:19:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:33,460 INFO L225 Difference]: With dead ends: 20489 [2020-10-29 13:19:33,460 INFO L226 Difference]: Without dead ends: 14938 [2020-10-29 13:19:33,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:19:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14938 states. [2020-10-29 13:19:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14938 to 7886. [2020-10-29 13:19:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7886 states. [2020-10-29 13:19:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7886 states to 7886 states and 11086 transitions. [2020-10-29 13:19:34,747 INFO L78 Accepts]: Start accepts. Automaton has 7886 states and 11086 transitions. Word has length 61 [2020-10-29 13:19:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:34,747 INFO L481 AbstractCegarLoop]: Abstraction has 7886 states and 11086 transitions. [2020-10-29 13:19:34,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:19:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7886 states and 11086 transitions. [2020-10-29 13:19:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:19:34,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:34,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:34,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:19:34,751 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2063567525, now seen corresponding path program 1 times [2020-10-29 13:19:34,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:34,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697398251] [2020-10-29 13:19:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:34,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:34,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:34,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:35,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:35,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:35,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:36,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:39,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:39,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:19:39,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:19:39,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:19:39,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:39,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:39,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:39,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 13:19:39,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:19:39,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:40,096 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:40,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:40,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:40,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:40,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:40,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:40,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:19:40,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:40,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:40,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:40,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:40,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697398251] [2020-10-29 13:19:40,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:19:40,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:19:40,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240715080] [2020-10-29 13:19:40,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:40,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:40,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:40,131 INFO L87 Difference]: Start difference. First operand 7886 states and 11086 transitions. Second operand 6 states. [2020-10-29 13:19:40,392 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:41,193 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:19:41,498 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:19:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:42,741 INFO L93 Difference]: Finished difference Result 15972 states and 22562 transitions. [2020-10-29 13:19:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:19:42,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-29 13:19:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:42,764 INFO L225 Difference]: With dead ends: 15972 [2020-10-29 13:19:42,764 INFO L226 Difference]: Without dead ends: 10997 [2020-10-29 13:19:42,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:19:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10997 states. [2020-10-29 13:19:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10997 to 10222. [2020-10-29 13:19:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10222 states. [2020-10-29 13:19:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10222 states to 10222 states and 14462 transitions. [2020-10-29 13:19:44,243 INFO L78 Accepts]: Start accepts. Automaton has 10222 states and 14462 transitions. Word has length 82 [2020-10-29 13:19:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:44,243 INFO L481 AbstractCegarLoop]: Abstraction has 10222 states and 14462 transitions. [2020-10-29 13:19:44,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 10222 states and 14462 transitions. [2020-10-29 13:19:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:19:44,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:44,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:44,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:19:44,246 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1327465643, now seen corresponding path program 1 times [2020-10-29 13:19:44,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:44,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859095131] [2020-10-29 13:19:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:44,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:44,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:44,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:44,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:44,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:45,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:49,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:49,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:19:49,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:19:49,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:19:49,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:49,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:49,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:19:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:19:49,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:49,484 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:49,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:49,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:49,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:49,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:49,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:49,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:19:49,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:49,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:49,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:49,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859095131] [2020-10-29 13:19:49,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:19:49,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:19:49,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154426513] [2020-10-29 13:19:49,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:49,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:49,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:49,512 INFO L87 Difference]: Start difference. First operand 10222 states and 14462 transitions. Second operand 6 states. [2020-10-29 13:19:49,752 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:19:50,469 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:19:50,740 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:19:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:19:52,154 INFO L93 Difference]: Finished difference Result 20218 states and 28644 transitions. [2020-10-29 13:19:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:19:52,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-29 13:19:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:19:52,169 INFO L225 Difference]: With dead ends: 20218 [2020-10-29 13:19:52,169 INFO L226 Difference]: Without dead ends: 13543 [2020-10-29 13:19:52,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:19:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13543 states. [2020-10-29 13:19:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13543 to 12558. [2020-10-29 13:19:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12558 states. [2020-10-29 13:19:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12558 states to 12558 states and 17838 transitions. [2020-10-29 13:19:54,286 INFO L78 Accepts]: Start accepts. Automaton has 12558 states and 17838 transitions. Word has length 82 [2020-10-29 13:19:54,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:19:54,286 INFO L481 AbstractCegarLoop]: Abstraction has 12558 states and 17838 transitions. [2020-10-29 13:19:54,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:19:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 12558 states and 17838 transitions. [2020-10-29 13:19:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:19:54,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:19:54,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:19:54,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:19:54,289 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:19:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:19:54,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1630902479, now seen corresponding path program 1 times [2020-10-29 13:19:54,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:19:54,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136729661] [2020-10-29 13:19:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:19:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:54,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:54,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:54,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:54,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:54,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:55,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:55,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:55,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:55,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:56,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:56,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:57,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:57,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:59,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:59,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:19:59,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:19:59,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:19:59,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:59,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:59,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:19:59,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:19:59,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:19:59,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:59,522 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:19:59,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:19:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:19:59,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:19:59,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:19:59,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:19:59,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:19:59,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:19:59,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:19:59,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:19:59,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:19:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:19:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:19:59,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:19:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:19:59,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136729661] [2020-10-29 13:19:59,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:19:59,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:19:59,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649919730] [2020-10-29 13:19:59,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:19:59,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:19:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:19:59,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:19:59,556 INFO L87 Difference]: Start difference. First operand 12558 states and 17838 transitions. Second operand 6 states. [2020-10-29 13:19:59,782 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:20:00,597 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:20:00,802 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:20:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:02,586 INFO L93 Difference]: Finished difference Result 24608 states and 34930 transitions. [2020-10-29 13:20:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:20:02,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-29 13:20:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:02,611 INFO L225 Difference]: With dead ends: 24608 [2020-10-29 13:20:02,611 INFO L226 Difference]: Without dead ends: 15597 [2020-10-29 13:20:02,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:20:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15597 states. [2020-10-29 13:20:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15597 to 14258. [2020-10-29 13:20:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14258 states. [2020-10-29 13:20:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14258 states to 14258 states and 20274 transitions. [2020-10-29 13:20:04,625 INFO L78 Accepts]: Start accepts. Automaton has 14258 states and 20274 transitions. Word has length 82 [2020-10-29 13:20:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:04,626 INFO L481 AbstractCegarLoop]: Abstraction has 14258 states and 20274 transitions. [2020-10-29 13:20:04,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:20:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 14258 states and 20274 transitions. [2020-10-29 13:20:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:20:04,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:04,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:04,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:20:04,632 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1806307947, now seen corresponding path program 1 times [2020-10-29 13:20:04,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:04,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065406499] [2020-10-29 13:20:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:04,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:04,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:05,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:05,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:09,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:09,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:20:09,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:20:09,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:20:09,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:09,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:20:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:20:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:09,918 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-29 13:20:10,166 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:20:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:10,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:10,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:10,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:10,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:10,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:20:10,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:10,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:10,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:10,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:10,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:10,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:10,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065406499] [2020-10-29 13:20:10,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:20:10,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:20:10,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049627671] [2020-10-29 13:20:10,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:20:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:20:10,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:10,206 INFO L87 Difference]: Start difference. First operand 14258 states and 20274 transitions. Second operand 9 states. [2020-10-29 13:20:10,492 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 13:20:13,919 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:20:14,178 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:20:14,617 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:20:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:20:27,227 INFO L93 Difference]: Finished difference Result 104703 states and 147065 transitions. [2020-10-29 13:20:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 13:20:27,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-29 13:20:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:20:27,395 INFO L225 Difference]: With dead ends: 104703 [2020-10-29 13:20:27,396 INFO L226 Difference]: Without dead ends: 90480 [2020-10-29 13:20:27,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:20:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90480 states. [2020-10-29 13:20:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90480 to 48153. [2020-10-29 13:20:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48153 states. [2020-10-29 13:20:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48153 states to 48153 states and 67855 transitions. [2020-10-29 13:20:36,024 INFO L78 Accepts]: Start accepts. Automaton has 48153 states and 67855 transitions. Word has length 84 [2020-10-29 13:20:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:20:36,024 INFO L481 AbstractCegarLoop]: Abstraction has 48153 states and 67855 transitions. [2020-10-29 13:20:36,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:20:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 48153 states and 67855 transitions. [2020-10-29 13:20:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:20:36,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:20:36,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:20:36,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:20:36,036 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:20:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:20:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1604581126, now seen corresponding path program 1 times [2020-10-29 13:20:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:20:36,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910629698] [2020-10-29 13:20:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:20:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:36,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:36,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:37,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:41,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:41,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:20:41,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:20:41,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:20:41,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:41,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:20:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:20:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:20:41,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:41,289 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 22 [2020-10-29 13:20:41,527 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:20:41,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:20:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:20:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:20:41,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:20:41,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:20:41,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:20:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:20:41,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:20:41,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:20:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:20:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:20:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:20:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:20:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:20:41,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910629698] [2020-10-29 13:20:41,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:20:41,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:20:41,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17060005] [2020-10-29 13:20:41,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:20:41,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:20:41,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:20:41,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:20:41,556 INFO L87 Difference]: Start difference. First operand 48153 states and 67855 transitions. Second operand 9 states. [2020-10-29 13:20:41,832 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 13:20:45,894 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:20:46,327 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:20:46,746 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:21:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:21:38,451 INFO L93 Difference]: Finished difference Result 346094 states and 483752 transitions. [2020-10-29 13:21:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 13:21:38,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-29 13:21:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:21:39,043 INFO L225 Difference]: With dead ends: 346094 [2020-10-29 13:21:39,044 INFO L226 Difference]: Without dead ends: 297976 [2020-10-29 13:21:39,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:21:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297976 states.