/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:21:37,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:21:37,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:21:37,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:21:37,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:21:37,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:21:37,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:21:37,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:21:37,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:21:37,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:21:37,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:21:37,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:21:37,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:21:37,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:21:37,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:21:37,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:21:37,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:21:37,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:21:37,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:21:37,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:21:37,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:21:37,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:21:37,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:21:37,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:21:37,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:21:37,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:21:37,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:21:37,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:21:37,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:21:37,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:21:37,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:21:37,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:21:37,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:21:37,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:21:37,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:21:37,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:21:37,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:21:37,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:21:37,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:21:37,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:21:37,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:21:37,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:21:37,886 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:21:37,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:21:37,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:21:37,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:21:37,890 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:21:37,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:21:37,890 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:21:37,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:21:37,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:21:37,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:21:37,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:21:37,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:21:37,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:21:37,893 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:21:37,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:21:37,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:21:37,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:21:37,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:21:37,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:21:37,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:21:37,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:21:37,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:21:37,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:21:37,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:21:37,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:21:37,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:21:37,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:21:37,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:21:37,897 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:21:37,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:21:38,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:21:38,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:21:38,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:21:38,335 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:21:38,336 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:21:38,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:21:38,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88002332b/8680f4f7227e44b58da90780f8465d31/FLAG59895131d [2020-10-27 05:21:39,181 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:21:39,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:21:39,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88002332b/8680f4f7227e44b58da90780f8465d31/FLAG59895131d [2020-10-27 05:21:39,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88002332b/8680f4f7227e44b58da90780f8465d31 [2020-10-27 05:21:39,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:21:39,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:21:39,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:21:39,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:21:39,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:21:39,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:39,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7830de24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39, skipping insertion in model container [2020-10-27 05:21:39,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:39,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:21:39,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:21:39,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:21:39,814 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:21:39,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:21:39,967 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:21:39,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39 WrapperNode [2020-10-27 05:21:39,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:21:39,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:21:39,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:21:39,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:21:39,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:39,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:39,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:39,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:40,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:40,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:40,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (1/1) ... [2020-10-27 05:21:40,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:21:40,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:21:40,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:21:40,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:21:40,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:21:40,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:21:40,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:21:40,125 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:21:40,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:21:40,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:21:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:21:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:21:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:21:40,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:21:40,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:21:40,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:21:40,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:21:40,127 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:21:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:21:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:21:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:21:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:21:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:21:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:21:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:21:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:21:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:21:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:21:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:21:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:21:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:21:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:21:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:21:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:21:40,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:21:40,844 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:21:40,845 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:21:40,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:21:40 BoogieIcfgContainer [2020-10-27 05:21:40,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:21:40,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:21:40,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:21:40,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:21:40,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:21:39" (1/3) ... [2020-10-27 05:21:40,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f445c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:21:40, skipping insertion in model container [2020-10-27 05:21:40,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:39" (2/3) ... [2020-10-27 05:21:40,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f445c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:21:40, skipping insertion in model container [2020-10-27 05:21:40,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:21:40" (3/3) ... [2020-10-27 05:21:40,856 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:21:40,868 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:21:40,873 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:21:40,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:21:40,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:21:40,916 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:21:40,916 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:21:40,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:21:40,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:21:40,916 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:21:40,917 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:21:40,917 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:21:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2020-10-27 05:21:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:21:40,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:40,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:40,948 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash 453713683, now seen corresponding path program 1 times [2020-10-27 05:21:40,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:40,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644693764] [2020-10-27 05:21:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:41,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:41,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:41,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:42,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:42,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:46,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:46,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:21:46,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:21:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4917 [2020-10-27 05:21:46,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:46,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:21:46,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:21:46,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:21:46,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:21:46,704 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:21:46,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:46,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:46,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:46,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:46,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:46,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:21:46,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:46,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:46,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:46,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:46,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:46,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644693764] [2020-10-27 05:21:46,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:46,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:21:46,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442848226] [2020-10-27 05:21:46,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:21:46,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:46,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:21:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:21:46,854 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 8 states. [2020-10-27 05:21:47,248 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:21:48,324 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:21:48,590 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:21:48,948 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:21:49,220 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:21:49,589 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:21:49,917 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:21:50,197 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:21:50,433 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:21:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:50,507 INFO L93 Difference]: Finished difference Result 762 states and 1204 transitions. [2020-10-27 05:21:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:21:50,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 05:21:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:50,531 INFO L225 Difference]: With dead ends: 762 [2020-10-27 05:21:50,532 INFO L226 Difference]: Without dead ends: 668 [2020-10-27 05:21:50,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:21:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-10-27 05:21:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 161. [2020-10-27 05:21:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 05:21:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 232 transitions. [2020-10-27 05:21:50,637 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 232 transitions. Word has length 65 [2020-10-27 05:21:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:50,638 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 232 transitions. [2020-10-27 05:21:50,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:21:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 232 transitions. [2020-10-27 05:21:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:21:50,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:50,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:50,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:21:50,651 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:50,652 INFO L82 PathProgramCache]: Analyzing trace with hash -203917944, now seen corresponding path program 1 times [2020-10-27 05:21:50,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:50,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782738345] [2020-10-27 05:21:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:51,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:55,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:55,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:21:55,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:21:55,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:21:55,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:55,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:21:55,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:55,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:21:55,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:56,117 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:21:56,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:56,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:56,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:56,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:56,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:56,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:21:56,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:56,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:56,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:56,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:56,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:56,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782738345] [2020-10-27 05:21:56,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:56,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:21:56,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841257823] [2020-10-27 05:21:56,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:21:56,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:21:56,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:21:56,198 INFO L87 Difference]: Start difference. First operand 161 states and 232 transitions. Second operand 7 states. [2020-10-27 05:21:56,488 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:21:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:57,192 INFO L93 Difference]: Finished difference Result 478 states and 731 transitions. [2020-10-27 05:21:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:21:57,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-27 05:21:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:57,197 INFO L225 Difference]: With dead ends: 478 [2020-10-27 05:21:57,197 INFO L226 Difference]: Without dead ends: 355 [2020-10-27 05:21:57,198 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 [2020-10-27 05:21:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-27 05:21:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 220. [2020-10-27 05:21:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-27 05:21:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 324 transitions. [2020-10-27 05:21:57,228 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 324 transitions. Word has length 67 [2020-10-27 05:21:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:57,229 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 324 transitions. [2020-10-27 05:21:57,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:21:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 324 transitions. [2020-10-27 05:21:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:21:57,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:57,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:57,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:21:57,231 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:57,231 INFO L82 PathProgramCache]: Analyzing trace with hash 532183938, now seen corresponding path program 1 times [2020-10-27 05:21:57,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:57,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760367510] [2020-10-27 05:21:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:57,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:57,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:57,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:57,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:02,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:02,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:22:02,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:22:02,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:22:02,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:02,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:22:02,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:02,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:22:02,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:02,604 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:02,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:02,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:02,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:02,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:02,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:02,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 05:22:02,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:02,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:02,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760367510] [2020-10-27 05:22:02,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:02,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:22:02,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184571426] [2020-10-27 05:22:02,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:22:02,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:02,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:22:02,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:22:02,701 INFO L87 Difference]: Start difference. First operand 220 states and 324 transitions. Second operand 7 states. [2020-10-27 05:22:02,990 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:22:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:03,823 INFO L93 Difference]: Finished difference Result 473 states and 722 transitions. [2020-10-27 05:22:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:22:03,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-27 05:22:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:03,827 INFO L225 Difference]: With dead ends: 473 [2020-10-27 05:22:03,827 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 05:22:03,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:22:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 05:22:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 240. [2020-10-27 05:22:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 05:22:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 354 transitions. [2020-10-27 05:22:03,877 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 354 transitions. Word has length 67 [2020-10-27 05:22:03,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:03,877 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 354 transitions. [2020-10-27 05:22:03,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:22:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 354 transitions. [2020-10-27 05:22:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:22:03,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:03,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:03,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:22:03,882 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:03,883 INFO L82 PathProgramCache]: Analyzing trace with hash 302271320, now seen corresponding path program 1 times [2020-10-27 05:22:03,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:03,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278496028] [2020-10-27 05:22:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:03,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:03,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:06,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:22:06,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:22:06,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2399 [2020-10-27 05:22:06,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:06,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:06,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:22:06,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:22:06,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:06,596 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:06,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:06,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:06,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:06,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:06,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:22:06,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:06,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:06,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:06,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:06,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:06,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278496028] [2020-10-27 05:22:06,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:06,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:22:06,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551510446] [2020-10-27 05:22:06,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:22:06,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:06,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:22:06,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:22:06,639 INFO L87 Difference]: Start difference. First operand 240 states and 354 transitions. Second operand 4 states. [2020-10-27 05:22:06,915 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:22:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:07,435 INFO L93 Difference]: Finished difference Result 604 states and 921 transitions. [2020-10-27 05:22:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:22:07,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 05:22:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:07,439 INFO L225 Difference]: With dead ends: 604 [2020-10-27 05:22:07,439 INFO L226 Difference]: Without dead ends: 409 [2020-10-27 05:22:07,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:22:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-27 05:22:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 404. [2020-10-27 05:22:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-27 05:22:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 606 transitions. [2020-10-27 05:22:07,500 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 606 transitions. Word has length 67 [2020-10-27 05:22:07,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:07,500 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 606 transitions. [2020-10-27 05:22:07,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:22:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 606 transitions. [2020-10-27 05:22:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:22:07,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:07,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:07,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:22:07,502 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:07,503 INFO L82 PathProgramCache]: Analyzing trace with hash 923800953, now seen corresponding path program 1 times [2020-10-27 05:22:07,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:07,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496931704] [2020-10-27 05:22:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:07,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:07,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:07,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:08,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:10,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:10,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:22:10,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:22:10,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2499 [2020-10-27 05:22:10,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:10,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:22:10,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:22:10,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:22:10,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:10,424 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:10,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:10,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:10,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:10,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:10,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:10,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:22:10,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:10,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:10,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496931704] [2020-10-27 05:22:10,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:10,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:22:10,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518627167] [2020-10-27 05:22:10,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:22:10,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:10,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:22:10,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:22:10,504 INFO L87 Difference]: Start difference. First operand 404 states and 606 transitions. Second operand 8 states. [2020-10-27 05:22:10,891 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:22:11,745 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:22:11,998 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 05:22:12,372 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:22:12,639 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:22:12,883 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:22:13,342 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:13,659 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:22:13,967 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:22:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:14,017 INFO L93 Difference]: Finished difference Result 1514 states and 2326 transitions. [2020-10-27 05:22:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:22:14,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-27 05:22:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:14,024 INFO L225 Difference]: With dead ends: 1514 [2020-10-27 05:22:14,025 INFO L226 Difference]: Without dead ends: 1284 [2020-10-27 05:22:14,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:22:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-10-27 05:22:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 404. [2020-10-27 05:22:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-27 05:22:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 604 transitions. [2020-10-27 05:22:14,078 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 604 transitions. Word has length 67 [2020-10-27 05:22:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:14,079 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 604 transitions. [2020-10-27 05:22:14,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:22:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 604 transitions. [2020-10-27 05:22:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:22:14,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:14,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:14,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:22:14,081 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1132681230, now seen corresponding path program 1 times [2020-10-27 05:22:14,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:14,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302736866] [2020-10-27 05:22:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:14,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:15,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:19,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:19,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:22:19,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:22:19,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:22:19,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:22:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:22:19,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:19,532 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:19,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:19,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:19,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:19,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:19,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:19,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:22:19,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:19,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:19,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:19,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:19,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:19,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302736866] [2020-10-27 05:22:19,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:19,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:22:19,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830465744] [2020-10-27 05:22:19,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:22:19,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:19,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:22:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:22:19,635 INFO L87 Difference]: Start difference. First operand 404 states and 604 transitions. Second operand 7 states. [2020-10-27 05:22:19,901 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:22:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:20,626 INFO L93 Difference]: Finished difference Result 970 states and 1475 transitions. [2020-10-27 05:22:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:22:20,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-27 05:22:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:20,631 INFO L225 Difference]: With dead ends: 970 [2020-10-27 05:22:20,631 INFO L226 Difference]: Without dead ends: 676 [2020-10-27 05:22:20,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:22:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-10-27 05:22:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 396. [2020-10-27 05:22:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-27 05:22:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 584 transitions. [2020-10-27 05:22:20,681 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 584 transitions. Word has length 67 [2020-10-27 05:22:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:20,682 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 584 transitions. [2020-10-27 05:22:20,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:22:20,682 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 584 transitions. [2020-10-27 05:22:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:22:20,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:20,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:20,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:22:20,684 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1979130644, now seen corresponding path program 1 times [2020-10-27 05:22:20,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:20,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030389580] [2020-10-27 05:22:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:20,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:20,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:20,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:20,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:20,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:22,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:25,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:25,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:22:25,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:22:25,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4807 [2020-10-27 05:22:25,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:22:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:25,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:22:25,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:26,011 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:26,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:26,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:26,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:26,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:26,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:26,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:22:26,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:26,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:26,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030389580] [2020-10-27 05:22:26,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:26,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:22:26,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654534098] [2020-10-27 05:22:26,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:22:26,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:26,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:22:26,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:22:26,128 INFO L87 Difference]: Start difference. First operand 396 states and 584 transitions. Second operand 7 states. [2020-10-27 05:22:26,432 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:22:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:27,198 INFO L93 Difference]: Finished difference Result 1012 states and 1532 transitions. [2020-10-27 05:22:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:22:27,198 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-27 05:22:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:27,207 INFO L225 Difference]: With dead ends: 1012 [2020-10-27 05:22:27,207 INFO L226 Difference]: Without dead ends: 688 [2020-10-27 05:22:27,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:22:27,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-10-27 05:22:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 368. [2020-10-27 05:22:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-27 05:22:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 538 transitions. [2020-10-27 05:22:27,290 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 538 transitions. Word has length 67 [2020-10-27 05:22:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:27,290 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 538 transitions. [2020-10-27 05:22:27,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:22:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 538 transitions. [2020-10-27 05:22:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:22:27,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:27,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:27,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:22:27,298 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:27,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1266558041, now seen corresponding path program 1 times [2020-10-27 05:22:27,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:27,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661072803] [2020-10-27 05:22:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:27,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:27,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:27,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:28,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:30,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:32,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:32,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:22:32,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:22:32,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:22:32,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:22:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:22:32,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:32,667 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:32,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:32,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:32,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:32,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:32,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:22:32,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:32,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:32,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661072803] [2020-10-27 05:22:32,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:32,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:22:32,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773176508] [2020-10-27 05:22:32,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:22:32,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:32,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:22:32,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:22:32,734 INFO L87 Difference]: Start difference. First operand 368 states and 538 transitions. Second operand 7 states. [2020-10-27 05:22:32,999 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:22:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:33,781 INFO L93 Difference]: Finished difference Result 710 states and 1069 transitions. [2020-10-27 05:22:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:22:33,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-27 05:22:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:33,786 INFO L225 Difference]: With dead ends: 710 [2020-10-27 05:22:33,786 INFO L226 Difference]: Without dead ends: 525 [2020-10-27 05:22:33,788 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 [2020-10-27 05:22:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-27 05:22:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 336. [2020-10-27 05:22:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-27 05:22:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 491 transitions. [2020-10-27 05:22:33,834 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 491 transitions. Word has length 68 [2020-10-27 05:22:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:33,834 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 491 transitions. [2020-10-27 05:22:33,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:22:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 491 transitions. [2020-10-27 05:22:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:22:33,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:33,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:33,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:22:33,836 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2144055195, now seen corresponding path program 1 times [2020-10-27 05:22:33,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:33,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952469800] [2020-10-27 05:22:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:33,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:33,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:33,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:34,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:34,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:35,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:35,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:38,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:38,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:22:38,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:22:38,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4778 [2020-10-27 05:22:38,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:38,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:22:38,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:22:38,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:22:38,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:38,967 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:38,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:38,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:38,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:38,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:38,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:38,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:22:38,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:38,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:38,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:38,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:39,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952469800] [2020-10-27 05:22:39,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:39,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:22:39,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313493900] [2020-10-27 05:22:39,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:22:39,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:39,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:22:39,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:22:39,016 INFO L87 Difference]: Start difference. First operand 336 states and 491 transitions. Second operand 5 states. [2020-10-27 05:22:39,340 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:40,140 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:22:40,415 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:22:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:40,682 INFO L93 Difference]: Finished difference Result 584 states and 876 transitions. [2020-10-27 05:22:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:22:40,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 05:22:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:40,685 INFO L225 Difference]: With dead ends: 584 [2020-10-27 05:22:40,686 INFO L226 Difference]: Without dead ends: 461 [2020-10-27 05:22:40,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:22:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-27 05:22:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2020-10-27 05:22:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-27 05:22:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 672 transitions. [2020-10-27 05:22:40,772 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 672 transitions. Word has length 68 [2020-10-27 05:22:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:40,773 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 672 transitions. [2020-10-27 05:22:40,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:22:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 672 transitions. [2020-10-27 05:22:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:22:40,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:40,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:40,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:22:40,775 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:40,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1486310900, now seen corresponding path program 1 times [2020-10-27 05:22:40,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:40,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369410603] [2020-10-27 05:22:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:40,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:40,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:40,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:40,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:41,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1544 [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 05:22:42,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:42,581 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:42,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:42,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:42,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:42,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:42,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:42,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:22:42,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:42,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:42,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:42,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:42,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:42,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369410603] [2020-10-27 05:22:42,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:42,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:22:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318605336] [2020-10-27 05:22:42,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:22:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:42,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:22:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:22:42,609 INFO L87 Difference]: Start difference. First operand 453 states and 672 transitions. Second operand 4 states. [2020-10-27 05:22:42,869 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:22:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:43,490 INFO L93 Difference]: Finished difference Result 1141 states and 1732 transitions. [2020-10-27 05:22:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:22:43,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-27 05:22:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:43,495 INFO L225 Difference]: With dead ends: 1141 [2020-10-27 05:22:43,495 INFO L226 Difference]: Without dead ends: 748 [2020-10-27 05:22:43,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:22:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-27 05:22:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 745. [2020-10-27 05:22:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-10-27 05:22:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1119 transitions. [2020-10-27 05:22:43,615 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1119 transitions. Word has length 68 [2020-10-27 05:22:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:43,615 INFO L481 AbstractCegarLoop]: Abstraction has 745 states and 1119 transitions. [2020-10-27 05:22:43,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:22:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1119 transitions. [2020-10-27 05:22:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:22:43,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:43,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:43,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:22:43,617 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 599543483, now seen corresponding path program 1 times [2020-10-27 05:22:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:43,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617239268] [2020-10-27 05:22:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:43,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:43,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:43,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:43,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:44,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:45,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:45,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:22:45,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:22:45,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2000 [2020-10-27 05:22:45,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:22:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:22:45,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:45,936 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:45,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:45,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:45,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:45,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:45,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:45,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:22:45,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:46,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617239268] [2020-10-27 05:22:46,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:46,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:22:46,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676884014] [2020-10-27 05:22:46,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:22:46,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:22:46,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:22:46,022 INFO L87 Difference]: Start difference. First operand 745 states and 1119 transitions. Second operand 6 states. [2020-10-27 05:22:46,326 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:47,102 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:22:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:47,188 INFO L93 Difference]: Finished difference Result 2071 states and 3155 transitions. [2020-10-27 05:22:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:22:47,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 05:22:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:47,198 INFO L225 Difference]: With dead ends: 2071 [2020-10-27 05:22:47,198 INFO L226 Difference]: Without dead ends: 1382 [2020-10-27 05:22:47,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:22:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2020-10-27 05:22:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1379. [2020-10-27 05:22:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1379 states. [2020-10-27 05:22:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 2089 transitions. [2020-10-27 05:22:47,392 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 2089 transitions. Word has length 69 [2020-10-27 05:22:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:47,392 INFO L481 AbstractCegarLoop]: Abstraction has 1379 states and 2089 transitions. [2020-10-27 05:22:47,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:22:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 2089 transitions. [2020-10-27 05:22:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:22:47,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:47,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:47,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:22:47,394 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:47,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:47,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1837001824, now seen corresponding path program 1 times [2020-10-27 05:22:47,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:47,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208746080] [2020-10-27 05:22:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:47,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:47,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:22:47,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:22:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-27 05:22:47,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:22:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:22:47,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:48,224 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:48,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:48,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:48,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:48,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:48,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:22:48,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:48,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:48,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208746080] [2020-10-27 05:22:48,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:22:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411449702] [2020-10-27 05:22:48,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:22:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:22:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:22:48,250 INFO L87 Difference]: Start difference. First operand 1379 states and 2089 transitions. Second operand 4 states. [2020-10-27 05:22:48,510 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:22:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:49,289 INFO L93 Difference]: Finished difference Result 3767 states and 5743 transitions. [2020-10-27 05:22:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:22:49,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 05:22:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:49,302 INFO L225 Difference]: With dead ends: 3767 [2020-10-27 05:22:49,303 INFO L226 Difference]: Without dead ends: 2460 [2020-10-27 05:22:49,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:22:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2020-10-27 05:22:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2457. [2020-10-27 05:22:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2457 states. [2020-10-27 05:22:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3709 transitions. [2020-10-27 05:22:49,712 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3709 transitions. Word has length 69 [2020-10-27 05:22:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:49,712 INFO L481 AbstractCegarLoop]: Abstraction has 2457 states and 3709 transitions. [2020-10-27 05:22:49,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:22:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3709 transitions. [2020-10-27 05:22:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:22:49,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:49,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:49,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:22:49,714 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1404406056, now seen corresponding path program 1 times [2020-10-27 05:22:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:49,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539043141] [2020-10-27 05:22:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:49,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:49,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:49,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:50,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:50,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:50,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:22:50,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:22:50,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-10-27 05:22:50,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:22:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:22:50,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:51,050 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:51,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:51,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:51,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:51,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:51,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:51,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:22:51,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:51,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:51,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:51,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:51,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:51,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539043141] [2020-10-27 05:22:51,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:51,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:22:51,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930501763] [2020-10-27 05:22:51,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:22:51,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:22:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:22:51,096 INFO L87 Difference]: Start difference. First operand 2457 states and 3709 transitions. Second operand 6 states. [2020-10-27 05:22:51,418 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:22:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:52,153 INFO L93 Difference]: Finished difference Result 4846 states and 7341 transitions. [2020-10-27 05:22:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:22:52,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-27 05:22:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:52,170 INFO L225 Difference]: With dead ends: 4846 [2020-10-27 05:22:52,170 INFO L226 Difference]: Without dead ends: 2457 [2020-10-27 05:22:52,176 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 [2020-10-27 05:22:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2020-10-27 05:22:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2457. [2020-10-27 05:22:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2457 states. [2020-10-27 05:22:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3683 transitions. [2020-10-27 05:22:52,609 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3683 transitions. Word has length 70 [2020-10-27 05:22:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:52,610 INFO L481 AbstractCegarLoop]: Abstraction has 2457 states and 3683 transitions. [2020-10-27 05:22:52,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:22:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3683 transitions. [2020-10-27 05:22:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:22:52,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:52,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:52,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:22:52,611 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1916598131, now seen corresponding path program 1 times [2020-10-27 05:22:52,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:52,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106128703] [2020-10-27 05:22:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:52,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:52,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:52,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:53,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:53,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:22:53,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:22:53,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-27 05:22:53,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:53,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:53,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 05:22:53,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:22:53,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:53,392 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:53,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:53,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:53,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:53,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:53,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:53,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:22:53,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:53,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:53,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106128703] [2020-10-27 05:22:53,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:53,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:22:53,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817081122] [2020-10-27 05:22:53,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:22:53,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:53,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:22:53,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:22:53,435 INFO L87 Difference]: Start difference. First operand 2457 states and 3683 transitions. Second operand 4 states. [2020-10-27 05:22:53,714 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:22:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:54,791 INFO L93 Difference]: Finished difference Result 6801 states and 10207 transitions. [2020-10-27 05:22:54,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:22:54,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 05:22:54,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:54,813 INFO L225 Difference]: With dead ends: 6801 [2020-10-27 05:22:54,813 INFO L226 Difference]: Without dead ends: 4428 [2020-10-27 05:22:54,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:22:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2020-10-27 05:22:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4425. [2020-10-27 05:22:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4425 states. [2020-10-27 05:22:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 6569 transitions. [2020-10-27 05:22:55,612 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 6569 transitions. Word has length 70 [2020-10-27 05:22:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:55,613 INFO L481 AbstractCegarLoop]: Abstraction has 4425 states and 6569 transitions. [2020-10-27 05:22:55,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:22:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 6569 transitions. [2020-10-27 05:22:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:22:55,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:55,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:55,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:22:55,614 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:55,615 INFO L82 PathProgramCache]: Analyzing trace with hash 79114573, now seen corresponding path program 1 times [2020-10-27 05:22:55,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:55,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805416308] [2020-10-27 05:22:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:55,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:55,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:22:55,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:56,163 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:56,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:56,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:56,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:56,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:56,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:56,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:22:56,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:56,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:56,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805416308] [2020-10-27 05:22:56,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:56,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:22:56,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176076325] [2020-10-27 05:22:56,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:22:56,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:22:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:22:56,193 INFO L87 Difference]: Start difference. First operand 4425 states and 6569 transitions. Second operand 4 states. [2020-10-27 05:22:56,478 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:22:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:57,896 INFO L93 Difference]: Finished difference Result 12319 states and 18237 transitions. [2020-10-27 05:22:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:22:57,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-27 05:22:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:57,928 INFO L225 Difference]: With dead ends: 12319 [2020-10-27 05:22:57,929 INFO L226 Difference]: Without dead ends: 7982 [2020-10-27 05:22:57,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:22:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2020-10-27 05:22:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 7934. [2020-10-27 05:22:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7934 states. [2020-10-27 05:22:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 11614 transitions. [2020-10-27 05:22:58,958 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 11614 transitions. Word has length 71 [2020-10-27 05:22:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:58,958 INFO L481 AbstractCegarLoop]: Abstraction has 7934 states and 11614 transitions. [2020-10-27 05:22:58,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:22:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 11614 transitions. [2020-10-27 05:22:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:22:58,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:58,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:22:58,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:22:58,959 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:58,960 INFO L82 PathProgramCache]: Analyzing trace with hash 951964737, now seen corresponding path program 1 times [2020-10-27 05:22:58,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:58,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747045805] [2020-10-27 05:22:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:58,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:59,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:59,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:59,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:22:59,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:22:59,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-27 05:22:59,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:59,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:22:59,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:59,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:22:59,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:59,642 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:22:59,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:59,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:59,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:59,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:59,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:22:59,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:59,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:59,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747045805] [2020-10-27 05:22:59,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:59,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:22:59,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446050076] [2020-10-27 05:22:59,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:22:59,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:22:59,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:22:59,714 INFO L87 Difference]: Start difference. First operand 7934 states and 11614 transitions. Second operand 6 states. [2020-10-27 05:23:00,002 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:23:00,946 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:23:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:02,505 INFO L93 Difference]: Finished difference Result 23620 states and 34562 transitions. [2020-10-27 05:23:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:23:02,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 05:23:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:02,546 INFO L225 Difference]: With dead ends: 23620 [2020-10-27 05:23:02,547 INFO L226 Difference]: Without dead ends: 15729 [2020-10-27 05:23:02,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:23:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15729 states. [2020-10-27 05:23:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15729 to 15726. [2020-10-27 05:23:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15726 states. [2020-10-27 05:23:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15726 states to 15726 states and 22894 transitions. [2020-10-27 05:23:04,751 INFO L78 Accepts]: Start accepts. Automaton has 15726 states and 22894 transitions. Word has length 72 [2020-10-27 05:23:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:04,752 INFO L481 AbstractCegarLoop]: Abstraction has 15726 states and 22894 transitions. [2020-10-27 05:23:04,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:23:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 15726 states and 22894 transitions. [2020-10-27 05:23:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:23:04,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:04,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:23:04,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:23:04,753 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:04,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1723828390, now seen corresponding path program 1 times [2020-10-27 05:23:04,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:04,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420691530] [2020-10-27 05:23:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:04,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:04,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:04,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:23:04,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:04,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 05:23:04,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:23:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 05:23:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:23:04,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:05,129 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:23:05,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:05,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:05,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:05,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:05,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:05,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:23:05,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:23:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:23:05,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:23:05,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420691530] [2020-10-27 05:23:05,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:23:05,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:23:05,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026859958] [2020-10-27 05:23:05,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:23:05,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:05,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:23:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:23:05,156 INFO L87 Difference]: Start difference. First operand 15726 states and 22894 transitions. Second operand 5 states. [2020-10-27 05:23:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:08,662 INFO L93 Difference]: Finished difference Result 24920 states and 36199 transitions. [2020-10-27 05:23:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:23:08,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-27 05:23:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:08,719 INFO L225 Difference]: With dead ends: 24920 [2020-10-27 05:23:08,719 INFO L226 Difference]: Without dead ends: 24917 [2020-10-27 05:23:08,726 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 [2020-10-27 05:23:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24917 states. [2020-10-27 05:23:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24917 to 15982. [2020-10-27 05:23:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15982 states. [2020-10-27 05:23:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15982 states to 15982 states and 23022 transitions. [2020-10-27 05:23:11,479 INFO L78 Accepts]: Start accepts. Automaton has 15982 states and 23022 transitions. Word has length 72 [2020-10-27 05:23:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:11,479 INFO L481 AbstractCegarLoop]: Abstraction has 15982 states and 23022 transitions. [2020-10-27 05:23:11,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:23:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15982 states and 23022 transitions. [2020-10-27 05:23:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:23:11,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:11,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:23:11,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:23:11,487 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash 2101427831, now seen corresponding path program 1 times [2020-10-27 05:23:11,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:11,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284689825] [2020-10-27 05:23:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:11,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:11,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:11,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:12,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:12,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:13,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:16,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:16,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:23:16,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:23:16,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:23:16,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:16,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:23:16,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:23:16,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:23:16,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:16,973 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:23:16,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:16,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:17,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:17,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:17,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:23:17,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:23:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:23:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:23:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284689825] [2020-10-27 05:23:17,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:23:17,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:23:17,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176550154] [2020-10-27 05:23:17,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:23:17,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:17,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:23:17,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:23:17,034 INFO L87 Difference]: Start difference. First operand 15982 states and 23022 transitions. Second operand 11 states. [2020-10-27 05:23:17,364 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:23:20,692 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:23:21,140 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:23:21,468 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:23:26,476 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:23:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:31,867 INFO L93 Difference]: Finished difference Result 84594 states and 120830 transitions. [2020-10-27 05:23:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:23:31,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2020-10-27 05:23:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:32,119 INFO L225 Difference]: With dead ends: 84594 [2020-10-27 05:23:32,119 INFO L226 Difference]: Without dead ends: 68655 [2020-10-27 05:23:32,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=447, Invalid=1533, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 05:23:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68655 states. [2020-10-27 05:23:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68655 to 27010. [2020-10-27 05:23:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27010 states. [2020-10-27 05:23:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27010 states to 27010 states and 38738 transitions. [2020-10-27 05:23:36,688 INFO L78 Accepts]: Start accepts. Automaton has 27010 states and 38738 transitions. Word has length 99 [2020-10-27 05:23:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:36,688 INFO L481 AbstractCegarLoop]: Abstraction has 27010 states and 38738 transitions. [2020-10-27 05:23:36,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:23:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 27010 states and 38738 transitions. [2020-10-27 05:23:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:23:36,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:36,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:23:36,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:23:36,696 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:36,696 INFO L82 PathProgramCache]: Analyzing trace with hash -856940291, now seen corresponding path program 1 times [2020-10-27 05:23:36,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:36,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026825468] [2020-10-27 05:23:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:36,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:36,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:36,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:36,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:37,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:37,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:38,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:38,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:39,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:39,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:39,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:40,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:41,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:41,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:23:41,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:23:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 05:23:41,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:23:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:23:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 05:23:41,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:42,178 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:23:42,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:42,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:42,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:42,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:42,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:42,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:23:42,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:23:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:42,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:23:42,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:23:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026825468] [2020-10-27 05:23:42,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:23:42,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:23:42,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624503775] [2020-10-27 05:23:42,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:23:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:42,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:23:42,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:23:42,266 INFO L87 Difference]: Start difference. First operand 27010 states and 38738 transitions. Second operand 11 states. [2020-10-27 05:23:42,608 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:23:46,572 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:23:46,923 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:23:47,211 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:24:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:07,708 INFO L93 Difference]: Finished difference Result 158540 states and 225129 transitions. [2020-10-27 05:24:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:24:07,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2020-10-27 05:24:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:07,979 INFO L225 Difference]: With dead ends: 158540 [2020-10-27 05:24:07,979 INFO L226 Difference]: Without dead ends: 131573 [2020-10-27 05:24:08,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=362, Invalid=1198, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 05:24:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131573 states. [2020-10-27 05:24:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131573 to 64660. [2020-10-27 05:24:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64660 states. [2020-10-27 05:24:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64660 states to 64660 states and 92324 transitions. [2020-10-27 05:24:19,621 INFO L78 Accepts]: Start accepts. Automaton has 64660 states and 92324 transitions. Word has length 99 [2020-10-27 05:24:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:19,621 INFO L481 AbstractCegarLoop]: Abstraction has 64660 states and 92324 transitions. [2020-10-27 05:24:19,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:24:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 64660 states and 92324 transitions. [2020-10-27 05:24:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 05:24:19,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:19,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:24:19,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:24:19,635 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:19,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1092159495, now seen corresponding path program 1 times [2020-10-27 05:24:19,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:19,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821883771] [2020-10-27 05:24:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:19,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:19,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:19,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:19,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:20,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:24:24,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:25,111 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:24:25,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:25,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:25,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:25,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:25,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:25,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:24:25,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:24:25,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:24:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821883771] [2020-10-27 05:24:25,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:24:25,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:24:25,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789587871] [2020-10-27 05:24:25,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:24:25,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:24:25,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:24:25,169 INFO L87 Difference]: Start difference. First operand 64660 states and 92324 transitions. Second operand 11 states. [2020-10-27 05:24:25,494 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:24:31,581 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:24:32,185 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:24:33,055 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 168