/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:48:12,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:48:12,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:48:12,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:48:12,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:48:12,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:48:12,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:48:12,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:48:12,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:48:12,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:48:12,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:48:12,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:48:12,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:48:12,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:48:12,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:48:12,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:48:12,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:48:12,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:48:12,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:48:12,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:48:12,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:48:12,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:48:12,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:48:12,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:48:12,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:48:12,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:48:12,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:48:12,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:48:12,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:48:12,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:48:12,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:48:12,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:48:12,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:48:12,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:48:12,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:48:12,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:48:12,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:48:12,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:48:12,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:48:12,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:48:12,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:48:12,854 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 05:48:12,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:48:12,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:48:12,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:48:12,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:48:12,884 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:48:12,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:48:12,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:48:12,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:48:12,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:48:12,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:48:12,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:48:12,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:48:12,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:48:12,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:48:12,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:48:12,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:48:12,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:48:12,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:48:12,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:48:12,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:48:12,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:48:12,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:48:12,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:48:12,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:48:12,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:48:12,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:48:12,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:48:12,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:48:12,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:48:12,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:48:13,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:48:13,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:48:13,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:48:13,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:48:13,349 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:48:13,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-27 05:48:13,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/032d05ccb/39bd78ee944c478b8e33fc0715f74fb3/FLAGa18b67d93 [2020-10-27 05:48:14,477 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:48:14,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-27 05:48:14,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/032d05ccb/39bd78ee944c478b8e33fc0715f74fb3/FLAGa18b67d93 [2020-10-27 05:48:14,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/032d05ccb/39bd78ee944c478b8e33fc0715f74fb3 [2020-10-27 05:48:14,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:48:14,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:48:14,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:48:14,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:48:14,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:48:14,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:48:14" (1/1) ... [2020-10-27 05:48:14,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab053d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:14, skipping insertion in model container [2020-10-27 05:48:14,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:48:14" (1/1) ... [2020-10-27 05:48:14,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:48:15,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:48:16,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:48:16,660 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:48:17,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:48:17,408 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:48:17,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17 WrapperNode [2020-10-27 05:48:17,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:48:17,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:48:17,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:48:17,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:48:17,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (1/1) ... [2020-10-27 05:48:17,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (1/1) ... [2020-10-27 05:48:17,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (1/1) ... [2020-10-27 05:48:17,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (1/1) ... [2020-10-27 05:48:17,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (1/1) ... [2020-10-27 05:48:17,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (1/1) ... [2020-10-27 05:48:17,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (1/1) ... [2020-10-27 05:48:17,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:48:17,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:48:17,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:48:17,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:48:17,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:48:17,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:48:17,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:48:17,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:48:17,864 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:48:17,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:48:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:48:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:48:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:48:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:48:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:48:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:48:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:48:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:48:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:48:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:48:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:48:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:48:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:48:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:48:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:48:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:48:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:48:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:48:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:48:17,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:48:17,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:48:17,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:48:17,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:48:17,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:48:23,214 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:48:23,215 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:48:23,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:48:23 BoogieIcfgContainer [2020-10-27 05:48:23,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:48:23,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:48:23,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:48:23,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:48:23,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:48:14" (1/3) ... [2020-10-27 05:48:23,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5595c1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:48:23, skipping insertion in model container [2020-10-27 05:48:23,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:48:17" (2/3) ... [2020-10-27 05:48:23,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5595c1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:48:23, skipping insertion in model container [2020-10-27 05:48:23,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:48:23" (3/3) ... [2020-10-27 05:48:23,228 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-27 05:48:23,240 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:48:23,246 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:48:23,260 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:48:23,295 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:48:23,295 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:48:23,296 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:48:23,296 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:48:23,296 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:48:23,296 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:48:23,296 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:48:23,296 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:48:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states. [2020-10-27 05:48:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:48:23,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:23,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:23,424 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash 923845094, now seen corresponding path program 1 times [2020-10-27 05:48:23,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:23,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404327029] [2020-10-27 05:48:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:24,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:24,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:24,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:27,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:27,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:29,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:29,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:29,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:48:29,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:48:29,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-27 05:48:29,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:48:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:29,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:48:29,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:48:32,273 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-27 05:48:32,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:32,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:32,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:32,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:32,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:32,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 05:48:32,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:32,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:32,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:32,503 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 05:48:32,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404327029] [2020-10-27 05:48:32,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:32,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:48:32,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767180053] [2020-10-27 05:48:32,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:48:32,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:32,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:48:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:48:32,529 INFO L87 Difference]: Start difference. First operand 1768 states. Second operand 6 states. [2020-10-27 05:48:35,625 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 676 [2020-10-27 05:48:54,788 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 675 [2020-10-27 05:48:56,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:56,086 INFO L93 Difference]: Finished difference Result 2798 states and 4951 transitions. [2020-10-27 05:48:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:48:56,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:48:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:56,121 INFO L225 Difference]: With dead ends: 2798 [2020-10-27 05:48:56,121 INFO L226 Difference]: Without dead ends: 1529 [2020-10-27 05:48:56,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:48:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2020-10-27 05:48:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1522. [2020-10-27 05:48:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1522 states. [2020-10-27 05:48:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2078 transitions. [2020-10-27 05:48:56,328 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2078 transitions. Word has length 81 [2020-10-27 05:48:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:56,329 INFO L481 AbstractCegarLoop]: Abstraction has 1522 states and 2078 transitions. [2020-10-27 05:48:56,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:48:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2078 transitions. [2020-10-27 05:48:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:48:56,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:56,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:56,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:48:56,340 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:56,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:56,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1250488647, now seen corresponding path program 1 times [2020-10-27 05:48:56,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:56,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78726388] [2020-10-27 05:48:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:56,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:56,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:56,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:57,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:58,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:58,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:01,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:01,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:49:01,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:49:01,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:49:01,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:49:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:49:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:49:01,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:04,568 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-27 05:49:04,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:49:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:04,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:04,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:04,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:49:04,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:49:04,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 05:49:04,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:04,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:49:04,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:49:04,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:49:04,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:49:04,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78726388] [2020-10-27 05:49:04,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:49:04,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:49:04,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360025573] [2020-10-27 05:49:04,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:49:04,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:49:04,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:49:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:49:04,802 INFO L87 Difference]: Start difference. First operand 1522 states and 2078 transitions. Second operand 6 states. [2020-10-27 05:49:08,008 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification that was a NOOP. DAG size: 679 [2020-10-27 05:49:19,983 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 677 [2020-10-27 05:49:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:49:21,301 INFO L93 Difference]: Finished difference Result 2742 states and 3856 transitions. [2020-10-27 05:49:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:49:21,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:49:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:49:21,313 INFO L225 Difference]: With dead ends: 2742 [2020-10-27 05:49:21,313 INFO L226 Difference]: Without dead ends: 1603 [2020-10-27 05:49:21,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:49:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2020-10-27 05:49:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1596. [2020-10-27 05:49:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1596 states. [2020-10-27 05:49:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2245 transitions. [2020-10-27 05:49:21,399 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2245 transitions. Word has length 82 [2020-10-27 05:49:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:49:21,400 INFO L481 AbstractCegarLoop]: Abstraction has 1596 states and 2245 transitions. [2020-10-27 05:49:21,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:49:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2245 transitions. [2020-10-27 05:49:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:49:21,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:49:21,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:49:21,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:49:21,404 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:49:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:49:21,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1518112074, now seen corresponding path program 1 times [2020-10-27 05:49:21,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:49:21,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519360342] [2020-10-27 05:49:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:49:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:21,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:21,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:22,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:22,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:26,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:26,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:49:26,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:49:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 05:49:26,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:26,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:49:26,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:49:26,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:49:26,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:29,612 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-27 05:49:29,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:49:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:29,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:29,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:29,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:49:29,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:49:29,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 05:49:29,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:29,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:49:29,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:49:29,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:49:29,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:49:29,844 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 05:49:29,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519360342] [2020-10-27 05:49:29,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:49:29,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:49:29,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273448604] [2020-10-27 05:49:29,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:49:29,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:49:29,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:49:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:49:29,848 INFO L87 Difference]: Start difference. First operand 1596 states and 2245 transitions. Second operand 8 states. [2020-10-27 05:49:33,007 WARN L193 SmtUtils]: Spent 3.02 s on a formula simplification that was a NOOP. DAG size: 677 [2020-10-27 05:49:44,158 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 681 [2020-10-27 05:49:48,932 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification that was a NOOP. DAG size: 679 [2020-10-27 05:49:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:49:49,536 INFO L93 Difference]: Finished difference Result 3958 states and 5821 transitions. [2020-10-27 05:49:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:49:49,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-27 05:49:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:49:49,553 INFO L225 Difference]: With dead ends: 3958 [2020-10-27 05:49:49,553 INFO L226 Difference]: Without dead ends: 3041 [2020-10-27 05:49:49,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:49:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2020-10-27 05:49:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1600. [2020-10-27 05:49:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1600 states. [2020-10-27 05:49:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2241 transitions. [2020-10-27 05:49:49,677 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2241 transitions. Word has length 83 [2020-10-27 05:49:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:49:49,678 INFO L481 AbstractCegarLoop]: Abstraction has 1600 states and 2241 transitions. [2020-10-27 05:49:49,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:49:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2241 transitions. [2020-10-27 05:49:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:49:49,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:49:49,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:49:49,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:49:49,682 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:49:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:49:49,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1766430309, now seen corresponding path program 1 times [2020-10-27 05:49:49,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:49:49,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984138027] [2020-10-27 05:49:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:49:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:49,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:49,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:51,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:52,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:54,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:54,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:54,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:49:54,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:49:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 05:49:54,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:49:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:49:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:49:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:57,914 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-27 05:49:57,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:49:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:57,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:57,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:57,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:49:57,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:49:57,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 05:49:57,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:57,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:49:57,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:49:57,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:49:57,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:58,059 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 05:49:58,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984138027] [2020-10-27 05:49:58,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:49:58,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:49:58,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726854715] [2020-10-27 05:49:58,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:49:58,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:49:58,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:49:58,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:49:58,062 INFO L87 Difference]: Start difference. First operand 1600 states and 2241 transitions. Second operand 8 states. [2020-10-27 05:50:01,126 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 675 [2020-10-27 05:50:12,100 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 679 [2020-10-27 05:50:17,184 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification that was a NOOP. DAG size: 677 [2020-10-27 05:50:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:17,446 INFO L93 Difference]: Finished difference Result 4649 states and 6849 transitions. [2020-10-27 05:50:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:50:17,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-27 05:50:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:17,467 INFO L225 Difference]: With dead ends: 4649 [2020-10-27 05:50:17,467 INFO L226 Difference]: Without dead ends: 3981 [2020-10-27 05:50:17,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:50:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2020-10-27 05:50:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 1615. [2020-10-27 05:50:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1615 states. [2020-10-27 05:50:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2256 transitions. [2020-10-27 05:50:17,610 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2256 transitions. Word has length 83 [2020-10-27 05:50:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:17,611 INFO L481 AbstractCegarLoop]: Abstraction has 1615 states and 2256 transitions. [2020-10-27 05:50:17,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:50:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2256 transitions. [2020-10-27 05:50:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:50:17,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:17,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:50:17,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:50:17,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:17,615 INFO L82 PathProgramCache]: Analyzing trace with hash -9168340, now seen corresponding path program 1 times [2020-10-27 05:50:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:17,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398251473] [2020-10-27 05:50:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:17,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:17,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:18,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:18,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:21,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:22,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:22,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:50:22,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:50:22,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 05:50:22,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:50:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:50:22,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:50:22,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:25,748 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-27 05:50:25,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:25,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:25,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:25,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:25,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:25,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 05:50:25,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:25,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:50:25,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:25,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:50:25,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:25,861 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 05:50:25,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398251473] [2020-10-27 05:50:25,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:25,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:50:25,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611182759] [2020-10-27 05:50:25,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:50:25,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:50:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:50:25,863 INFO L87 Difference]: Start difference. First operand 1615 states and 2256 transitions. Second operand 6 states. [2020-10-27 05:50:28,907 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 676 [2020-10-27 05:50:38,070 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification that was a NOOP. DAG size: 675 [2020-10-27 05:50:39,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:39,567 INFO L93 Difference]: Finished difference Result 3283 states and 4706 transitions. [2020-10-27 05:50:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:50:39,567 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 05:50:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:39,577 INFO L225 Difference]: With dead ends: 3283 [2020-10-27 05:50:39,578 INFO L226 Difference]: Without dead ends: 2079 [2020-10-27 05:50:39,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:50:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2020-10-27 05:50:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 2072. [2020-10-27 05:50:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2072 states. [2020-10-27 05:50:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2941 transitions. [2020-10-27 05:50:39,746 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2941 transitions. Word has length 83 [2020-10-27 05:50:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:39,746 INFO L481 AbstractCegarLoop]: Abstraction has 2072 states and 2941 transitions. [2020-10-27 05:50:39,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:50:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2941 transitions. [2020-10-27 05:50:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:50:39,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:39,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:50:39,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:50:39,751 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1818034707, now seen corresponding path program 1 times [2020-10-27 05:50:39,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:39,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805721394] [2020-10-27 05:50:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:39,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:39,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:40,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:40,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:42,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:44,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:44,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:50:44,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:50:44,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 05:50:44,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:44,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:50:44,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:50:44,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 05:50:44,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:47,891 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-27 05:50:47,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:47,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:47,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:47,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:47,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:47,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 05:50:47,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:47,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:50:47,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:47,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:50:47,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:47,995 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 05:50:47,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805721394] [2020-10-27 05:50:47,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:47,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:50:47,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179929432] [2020-10-27 05:50:47,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:50:47,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:47,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:50:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:50:47,997 INFO L87 Difference]: Start difference. First operand 2072 states and 2941 transitions. Second operand 8 states. [2020-10-27 05:50:51,053 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 675 [2020-10-27 05:51:01,026 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification that was a NOOP. DAG size: 679 [2020-10-27 05:51:06,407 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 677 [2020-10-27 05:51:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:06,782 INFO L93 Difference]: Finished difference Result 7185 states and 10562 transitions. [2020-10-27 05:51:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:51:06,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-27 05:51:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:06,808 INFO L225 Difference]: With dead ends: 7185 [2020-10-27 05:51:06,808 INFO L226 Difference]: Without dead ends: 6251 [2020-10-27 05:51:06,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:51:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2020-10-27 05:51:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 2118. [2020-10-27 05:51:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2118 states. [2020-10-27 05:51:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 3003 transitions. [2020-10-27 05:51:07,052 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 3003 transitions. Word has length 83 [2020-10-27 05:51:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:07,052 INFO L481 AbstractCegarLoop]: Abstraction has 2118 states and 3003 transitions. [2020-10-27 05:51:07,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:51:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 3003 transitions. [2020-10-27 05:51:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:51:07,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:07,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:07,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:51:07,056 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1732422334, now seen corresponding path program 1 times [2020-10-27 05:51:07,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:07,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207141882] [2020-10-27 05:51:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:07,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:07,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:07,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:09,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:11,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:11,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:51:11,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:51:11,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4637 [2020-10-27 05:51:11,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:11,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:51:11,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:51:11,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 05:51:11,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:14,936 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-27 05:51:14,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:14,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:15,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:15,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:15,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:15,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 05:51:15,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:15,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:51:15,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:15,082 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 05:51:15,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207141882] [2020-10-27 05:51:15,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:15,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:51:15,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626639852] [2020-10-27 05:51:15,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:51:15,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:15,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:51:15,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:51:15,084 INFO L87 Difference]: Start difference. First operand 2118 states and 3003 transitions. Second operand 8 states. [2020-10-27 05:51:18,129 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification that was a NOOP. DAG size: 677 [2020-10-27 05:51:27,931 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification that was a NOOP. DAG size: 681 [2020-10-27 05:51:33,282 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification that was a NOOP. DAG size: 679 [2020-10-27 05:51:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:33,700 INFO L93 Difference]: Finished difference Result 6635 states and 9718 transitions. [2020-10-27 05:51:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:51:33,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-27 05:51:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:33,722 INFO L225 Difference]: With dead ends: 6635 [2020-10-27 05:51:33,722 INFO L226 Difference]: Without dead ends: 5698 [2020-10-27 05:51:33,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:51:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5698 states. [2020-10-27 05:51:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5698 to 2218. [2020-10-27 05:51:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2218 states. [2020-10-27 05:51:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3131 transitions. [2020-10-27 05:51:33,976 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3131 transitions. Word has length 83 [2020-10-27 05:51:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:33,977 INFO L481 AbstractCegarLoop]: Abstraction has 2218 states and 3131 transitions. [2020-10-27 05:51:33,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:51:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3131 transitions. [2020-10-27 05:51:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:51:33,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:33,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:51:33,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:51:33,981 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash -305560003, now seen corresponding path program 1 times [2020-10-27 05:51:33,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:33,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917978079] [2020-10-27 05:51:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:34,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:34,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:34,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:35,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:38,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:38,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:51:38,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:51:38,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4691 [2020-10-27 05:51:38,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:51:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:51:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:51:38,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:41,759 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-27 05:51:41,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:51:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:41,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:41,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:41,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:51:41,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:51:41,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 05:51:41,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:41,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:51:41,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:51:41,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:51:41,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:51:41,873 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 05:51:41,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917978079] [2020-10-27 05:51:41,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:51:41,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:51:41,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065525045] [2020-10-27 05:51:41,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:51:41,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:51:41,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:51:41,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:51:41,875 INFO L87 Difference]: Start difference. First operand 2218 states and 3131 transitions. Second operand 8 states. [2020-10-27 05:51:44,969 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 675 [2020-10-27 05:51:55,122 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification that was a NOOP. DAG size: 679