/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:09:56,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:09:56,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:09:56,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:09:56,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:09:56,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:09:56,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:09:56,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:09:56,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:09:56,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:09:56,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:09:56,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:09:56,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:09:56,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:09:56,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:09:56,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:09:56,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:09:56,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:09:56,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:09:56,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:09:56,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:09:56,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:09:56,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:09:56,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:09:56,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:09:56,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:09:56,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:09:56,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:09:56,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:09:56,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:09:56,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:09:56,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:09:56,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:09:56,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:09:56,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:09:56,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:09:56,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:09:56,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:09:56,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:09:56,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:09:56,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:09:56,727 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 14:09:56,755 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:09:56,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:09:56,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:09:56,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:09:56,758 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:09:56,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:09:56,759 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:09:56,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:09:56,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:09:56,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:09:56,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:09:56,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:09:56,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:09:56,760 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:09:56,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:09:56,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:09:56,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:09:56,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:09:56,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:09:56,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:09:56,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:09:56,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:09:56,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:09:56,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:09:56,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:09:56,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:09:56,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:09:56,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:09:56,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:09:56,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:09:57,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:09:57,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:09:57,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:09:57,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:09:57,187 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:09:57,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 14:09:57,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c39c1b92f/05356be5e2794a719241af77416adf0e/FLAG7de05ea98 [2020-10-29 14:09:57,985 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:09:57,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 14:09:58,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c39c1b92f/05356be5e2794a719241af77416adf0e/FLAG7de05ea98 [2020-10-29 14:09:58,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c39c1b92f/05356be5e2794a719241af77416adf0e [2020-10-29 14:09:58,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:09:58,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:09:58,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:09:58,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:09:58,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:09:58,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1c3019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:58, skipping insertion in model container [2020-10-29 14:09:58,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:09:58" (1/1) ... [2020-10-29 14:09:58,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:09:58,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:09:58,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:09:58,888 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:09:59,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:09:59,050 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:09:59,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59 WrapperNode [2020-10-29 14:09:59,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:09:59,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:09:59,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:09:59,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:09:59,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (1/1) ... [2020-10-29 14:09:59,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (1/1) ... [2020-10-29 14:09:59,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (1/1) ... [2020-10-29 14:09:59,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (1/1) ... [2020-10-29 14:09:59,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (1/1) ... [2020-10-29 14:09:59,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (1/1) ... [2020-10-29 14:09:59,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (1/1) ... [2020-10-29 14:09:59,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:09:59,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:09:59,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:09:59,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:09:59,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:09:59,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:09:59,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:09:59,291 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:09:59,291 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:09:59,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:09:59,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:09:59,292 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:09:59,293 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:09:59,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:09:59,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:09:59,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 14:09:59,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:09:59,295 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:09:59,295 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:09:59,295 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:09:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:09:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:09:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:09:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:09:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 14:09:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:09:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:09:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:09:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:09:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:09:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:09:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:09:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:09:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:10:01,114 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:10:01,116 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:10:01,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:10:01 BoogieIcfgContainer [2020-10-29 14:10:01,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:10:01,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:10:01,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:10:01,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:10:01,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:09:58" (1/3) ... [2020-10-29 14:10:01,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b82020a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:10:01, skipping insertion in model container [2020-10-29 14:10:01,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:09:59" (2/3) ... [2020-10-29 14:10:01,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b82020a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:10:01, skipping insertion in model container [2020-10-29 14:10:01,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:10:01" (3/3) ... [2020-10-29 14:10:01,133 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 14:10:01,147 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:10:01,154 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:10:01,172 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:10:01,219 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:10:01,219 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:10:01,219 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:10:01,220 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:10:01,220 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:10:01,220 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:10:01,220 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:10:01,220 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:10:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states. [2020-10-29 14:10:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 14:10:01,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:01,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:01,298 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:01,309 INFO L82 PathProgramCache]: Analyzing trace with hash -59655128, now seen corresponding path program 1 times [2020-10-29 14:10:01,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:01,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635376194] [2020-10-29 14:10:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:02,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:03,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:06,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:06,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 14:10:06,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 14:10:06,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-29 14:10:06,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:06,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:06,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:10:06,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-29 14:10:06,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 14:10:06,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 14:10:07,769 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:10:07,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:07,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:07,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:07,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:07,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:07,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 14:10:07,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:07,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:07,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:07,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:07,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:07,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:07,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635376194] [2020-10-29 14:10:07,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:07,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:10:07,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443007929] [2020-10-29 14:10:07,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:10:07,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:07,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:10:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:10:07,906 INFO L87 Difference]: Start difference. First operand 360 states. Second operand 4 states. [2020-10-29 14:10:08,656 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-29 14:10:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:11,271 INFO L93 Difference]: Finished difference Result 670 states and 1149 transitions. [2020-10-29 14:10:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:10:11,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-29 14:10:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:11,309 INFO L225 Difference]: With dead ends: 670 [2020-10-29 14:10:11,309 INFO L226 Difference]: Without dead ends: 499 [2020-10-29 14:10:11,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-29 14:10:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 495. [2020-10-29 14:10:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-29 14:10:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 818 transitions. [2020-10-29 14:10:11,462 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 818 transitions. Word has length 123 [2020-10-29 14:10:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:11,464 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 818 transitions. [2020-10-29 14:10:11,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:10:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 818 transitions. [2020-10-29 14:10:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 14:10:11,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:11,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:11,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:10:11,472 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1989088000, now seen corresponding path program 1 times [2020-10-29 14:10:11,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:11,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097433408] [2020-10-29 14:10:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:11,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:11,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:11,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:12,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:12,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:15,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:16,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:16,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:16,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-29 14:10:16,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:10:16,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-29 14:10:16,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:16,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:10:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:10:16,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-29 14:10:16,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:17,425 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:10:17,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:17,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:17,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:17,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:17,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:17,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 14:10:17,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:17,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:17,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:17,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:17,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097433408] [2020-10-29 14:10:17,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:17,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:10:17,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989739850] [2020-10-29 14:10:17,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:10:17,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:10:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:17,585 INFO L87 Difference]: Start difference. First operand 495 states and 818 transitions. Second operand 5 states. [2020-10-29 14:10:20,861 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:10:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:21,059 INFO L93 Difference]: Finished difference Result 1411 states and 2328 transitions. [2020-10-29 14:10:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:10:21,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-29 14:10:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:21,075 INFO L225 Difference]: With dead ends: 1411 [2020-10-29 14:10:21,075 INFO L226 Difference]: Without dead ends: 961 [2020-10-29 14:10:21,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:10:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-10-29 14:10:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 958. [2020-10-29 14:10:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2020-10-29 14:10:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1576 transitions. [2020-10-29 14:10:21,148 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1576 transitions. Word has length 126 [2020-10-29 14:10:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:21,149 INFO L481 AbstractCegarLoop]: Abstraction has 958 states and 1576 transitions. [2020-10-29 14:10:21,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:10:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1576 transitions. [2020-10-29 14:10:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-29 14:10:21,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:21,152 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:21,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:10:21,153 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1402765752, now seen corresponding path program 1 times [2020-10-29 14:10:21,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:21,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734007305] [2020-10-29 14:10:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:21,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:21,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:21,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:21,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:22,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:25,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:26,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:26,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 14:10:26,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:10:26,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-29 14:10:26,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:26,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:26,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:10:26,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:10:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 14:10:26,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:27,287 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:10:27,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:27,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:27,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:27,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:27,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:27,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 14:10:27,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:27,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:27,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:10:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:27,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734007305] [2020-10-29 14:10:27,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:27,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:10:27,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639936199] [2020-10-29 14:10:27,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:10:27,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:27,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:10:27,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:27,437 INFO L87 Difference]: Start difference. First operand 958 states and 1576 transitions. Second operand 5 states. [2020-10-29 14:10:30,692 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:10:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:30,917 INFO L93 Difference]: Finished difference Result 2687 states and 4401 transitions. [2020-10-29 14:10:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:10:30,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-29 14:10:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:30,936 INFO L225 Difference]: With dead ends: 2687 [2020-10-29 14:10:30,936 INFO L226 Difference]: Without dead ends: 1842 [2020-10-29 14:10:30,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:10:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2020-10-29 14:10:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1839. [2020-10-29 14:10:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1839 states. [2020-10-29 14:10:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 3008 transitions. [2020-10-29 14:10:31,099 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 3008 transitions. Word has length 127 [2020-10-29 14:10:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:31,101 INFO L481 AbstractCegarLoop]: Abstraction has 1839 states and 3008 transitions. [2020-10-29 14:10:31,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:10:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 3008 transitions. [2020-10-29 14:10:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-29 14:10:31,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:31,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:31,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:10:31,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:31,111 INFO L82 PathProgramCache]: Analyzing trace with hash -402255649, now seen corresponding path program 1 times [2020-10-29 14:10:31,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:31,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181855820] [2020-10-29 14:10:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:31,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:31,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:31,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:31,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:33,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:33,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:36,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:36,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-29 14:10:36,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:10:36,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 14:10:36,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:36,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:10:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:10:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 14:10:36,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:37,041 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:10:37,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:37,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:37,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:37,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:37,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:37,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 14:10:37,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:37,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:37,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:37,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181855820] [2020-10-29 14:10:37,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:37,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:10:37,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970123203] [2020-10-29 14:10:37,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:10:37,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:37,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:10:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:37,199 INFO L87 Difference]: Start difference. First operand 1839 states and 3008 transitions. Second operand 5 states. [2020-10-29 14:10:40,508 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:10:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:40,763 INFO L93 Difference]: Finished difference Result 5321 states and 8680 transitions. [2020-10-29 14:10:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:10:40,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-29 14:10:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:40,786 INFO L225 Difference]: With dead ends: 5321 [2020-10-29 14:10:40,786 INFO L226 Difference]: Without dead ends: 3577 [2020-10-29 14:10:40,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:10:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2020-10-29 14:10:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3574. [2020-10-29 14:10:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3574 states. [2020-10-29 14:10:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 5802 transitions. [2020-10-29 14:10:41,064 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 5802 transitions. Word has length 128 [2020-10-29 14:10:41,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:41,065 INFO L481 AbstractCegarLoop]: Abstraction has 3574 states and 5802 transitions. [2020-10-29 14:10:41,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:10:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 5802 transitions. [2020-10-29 14:10:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 14:10:41,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:41,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:41,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:10:41,076 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:41,076 INFO L82 PathProgramCache]: Analyzing trace with hash 699158533, now seen corresponding path program 1 times [2020-10-29 14:10:41,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:41,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510262008] [2020-10-29 14:10:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:41,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:41,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:41,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:41,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:41,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:46,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:46,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-29 14:10:46,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:10:46,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-29 14:10:46,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:46,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:46,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:10:46,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:10:46,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-29 14:10:46,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:46,874 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:10:46,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:46,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:46,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:46,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:46,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:46,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:10:46,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:46,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:46,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:46,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510262008] [2020-10-29 14:10:46,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:46,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:10:46,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805443004] [2020-10-29 14:10:46,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:10:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:46,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:10:46,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:46,982 INFO L87 Difference]: Start difference. First operand 3574 states and 5802 transitions. Second operand 5 states. [2020-10-29 14:10:50,184 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:10:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:50,469 INFO L93 Difference]: Finished difference Result 10487 states and 17011 transitions. [2020-10-29 14:10:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:10:50,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-29 14:10:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:10:50,508 INFO L225 Difference]: With dead ends: 10487 [2020-10-29 14:10:50,508 INFO L226 Difference]: Without dead ends: 6928 [2020-10-29 14:10:50,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:10:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2020-10-29 14:10:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6925. [2020-10-29 14:10:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6925 states. [2020-10-29 14:10:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6925 states to 6925 states and 11169 transitions. [2020-10-29 14:10:50,977 INFO L78 Accepts]: Start accepts. Automaton has 6925 states and 11169 transitions. Word has length 129 [2020-10-29 14:10:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:10:50,978 INFO L481 AbstractCegarLoop]: Abstraction has 6925 states and 11169 transitions. [2020-10-29 14:10:50,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:10:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 6925 states and 11169 transitions. [2020-10-29 14:10:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 14:10:50,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:10:50,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:10:50,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:10:50,991 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:10:50,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:10:50,992 INFO L82 PathProgramCache]: Analyzing trace with hash 805344044, now seen corresponding path program 1 times [2020-10-29 14:10:50,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:10:50,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233627561] [2020-10-29 14:10:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:10:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:51,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:51,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:56,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:56,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-29 14:10:56,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:10:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 14:10:56,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:56,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:10:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 14:10:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 14:10:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:56,712 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:10:56,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:56,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:56,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:56,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:56,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:10:56,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:56,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:56,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:10:56,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233627561] [2020-10-29 14:10:56,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:56,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:10:56,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053579294] [2020-10-29 14:10:56,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:10:56,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:10:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:10:56,794 INFO L87 Difference]: Start difference. First operand 6925 states and 11169 transitions. Second operand 4 states. [2020-10-29 14:10:57,446 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-29 14:10:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:10:59,994 INFO L93 Difference]: Finished difference Result 15315 states and 25125 transitions. [2020-10-29 14:10:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:10:59,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-10-29 14:10:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:00,051 INFO L225 Difference]: With dead ends: 15315 [2020-10-29 14:11:00,052 INFO L226 Difference]: Without dead ends: 10968 [2020-10-29 14:11:00,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10968 states. [2020-10-29 14:11:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10968 to 10933. [2020-10-29 14:11:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10933 states. [2020-10-29 14:11:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10933 states to 10933 states and 17753 transitions. [2020-10-29 14:11:00,796 INFO L78 Accepts]: Start accepts. Automaton has 10933 states and 17753 transitions. Word has length 129 [2020-10-29 14:11:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:00,857 INFO L481 AbstractCegarLoop]: Abstraction has 10933 states and 17753 transitions. [2020-10-29 14:11:00,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:11:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 10933 states and 17753 transitions. [2020-10-29 14:11:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-29 14:11:00,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:00,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:11:00,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:11:00,873 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:00,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1009914139, now seen corresponding path program 1 times [2020-10-29 14:11:00,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:00,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496787699] [2020-10-29 14:11:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:00,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:01,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:01,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:01,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:01,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:01,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:02,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:05,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:05,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-29 14:11:05,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:11:05,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 14:11:05,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:05,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:05,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:11:05,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:11:05,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-29 14:11:05,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:06,669 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:11:06,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:06,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:06,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:06,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:06,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:06,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:11:06,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:06,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:06,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:06,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:06,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:06,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:06,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496787699] [2020-10-29 14:11:06,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:06,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:11:06,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361983827] [2020-10-29 14:11:06,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:11:06,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:11:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:06,764 INFO L87 Difference]: Start difference. First operand 10933 states and 17753 transitions. Second operand 5 states. [2020-10-29 14:11:10,793 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:11:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:11,384 INFO L93 Difference]: Finished difference Result 31816 states and 51600 transitions. [2020-10-29 14:11:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:11:11,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-29 14:11:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:11,445 INFO L225 Difference]: With dead ends: 31816 [2020-10-29 14:11:11,445 INFO L226 Difference]: Without dead ends: 21293 [2020-10-29 14:11:11,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:11:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21293 states. [2020-10-29 14:11:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21293 to 21290. [2020-10-29 14:11:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21290 states. [2020-10-29 14:11:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21290 states to 21290 states and 34316 transitions. [2020-10-29 14:11:12,983 INFO L78 Accepts]: Start accepts. Automaton has 21290 states and 34316 transitions. Word has length 132 [2020-10-29 14:11:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:12,983 INFO L481 AbstractCegarLoop]: Abstraction has 21290 states and 34316 transitions. [2020-10-29 14:11:12,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:11:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 21290 states and 34316 transitions. [2020-10-29 14:11:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-29 14:11:13,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:13,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:11:13,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:11:13,012 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 236545660, now seen corresponding path program 1 times [2020-10-29 14:11:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:13,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164201923] [2020-10-29 14:11:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:13,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:13,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:13,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:13,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:13,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:13,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:14,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:14,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:18,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-29 14:11:18,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:18,742 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:11:18,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:18,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:18,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:18,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:18,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 14:11:18,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:18,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:18,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164201923] [2020-10-29 14:11:18,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:18,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:11:18,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832219395] [2020-10-29 14:11:18,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:11:18,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:18,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:11:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:18,814 INFO L87 Difference]: Start difference. First operand 21290 states and 34316 transitions. Second operand 5 states. [2020-10-29 14:11:22,752 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:11:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:23,946 INFO L93 Difference]: Finished difference Result 62024 states and 99857 transitions. [2020-10-29 14:11:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:11:23,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-10-29 14:11:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:24,072 INFO L225 Difference]: With dead ends: 62024 [2020-10-29 14:11:24,072 INFO L226 Difference]: Without dead ends: 41357 [2020-10-29 14:11:24,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:11:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41357 states. [2020-10-29 14:11:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41357 to 41354. [2020-10-29 14:11:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41354 states. [2020-10-29 14:11:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41354 states to 41354 states and 66169 transitions. [2020-10-29 14:11:26,436 INFO L78 Accepts]: Start accepts. Automaton has 41354 states and 66169 transitions. Word has length 133 [2020-10-29 14:11:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:26,436 INFO L481 AbstractCegarLoop]: Abstraction has 41354 states and 66169 transitions. [2020-10-29 14:11:26,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:11:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41354 states and 66169 transitions. [2020-10-29 14:11:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-29 14:11:26,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:26,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:11:26,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:11:26,481 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:26,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1039232614, now seen corresponding path program 1 times [2020-10-29 14:11:26,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:26,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390851418] [2020-10-29 14:11:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:26,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:26,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:26,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:26,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:27,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:28,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:31,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:31,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 14:11:31,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:11:31,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 14:11:31,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:31,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:11:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:11:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-29 14:11:31,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:32,272 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:11:32,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:32,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:32,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:32,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:32,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:32,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:11:32,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:32,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:32,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:32,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390851418] [2020-10-29 14:11:32,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:32,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:11:32,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668742820] [2020-10-29 14:11:32,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:11:32,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:32,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:11:32,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:11:32,352 INFO L87 Difference]: Start difference. First operand 41354 states and 66169 transitions. Second operand 5 states. [2020-10-29 14:11:37,096 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:11:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:11:39,592 INFO L93 Difference]: Finished difference Result 122020 states and 195168 transitions. [2020-10-29 14:11:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:11:39,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-29 14:11:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:11:39,742 INFO L225 Difference]: With dead ends: 122020 [2020-10-29 14:11:39,742 INFO L226 Difference]: Without dead ends: 80973 [2020-10-29 14:11:39,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:11:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80973 states. [2020-10-29 14:11:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80973 to 80970. [2020-10-29 14:11:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80970 states. [2020-10-29 14:11:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80970 states to 80970 states and 128858 transitions. [2020-10-29 14:11:45,081 INFO L78 Accepts]: Start accepts. Automaton has 80970 states and 128858 transitions. Word has length 134 [2020-10-29 14:11:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:11:45,087 INFO L481 AbstractCegarLoop]: Abstraction has 80970 states and 128858 transitions. [2020-10-29 14:11:45,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:11:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 80970 states and 128858 transitions. [2020-10-29 14:11:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-29 14:11:45,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:11:45,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:11:45,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:11:45,334 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:11:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:11:45,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1300652240, now seen corresponding path program 1 times [2020-10-29 14:11:45,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:11:45,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214205369] [2020-10-29 14:11:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:11:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:45,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:45,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:45,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:45,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:45,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:46,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:46,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:47,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:50,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:50,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-29 14:11:50,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:11:50,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-29 14:11:50,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:50,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:50,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:11:50,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-29 14:11:50,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 14:11:50,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:51,119 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:11:51,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:11:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:11:51,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:11:51,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:11:51,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:11:51,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:11:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 14:11:51,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:11:51,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:11:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:11:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:11:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:11:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:11:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:11:51,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214205369] [2020-10-29 14:11:51,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:11:51,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:11:51,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728501984] [2020-10-29 14:11:51,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:11:51,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:11:51,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:11:51,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:11:51,168 INFO L87 Difference]: Start difference. First operand 80970 states and 128858 transitions. Second operand 4 states. [2020-10-29 14:11:51,895 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-29 14:12:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:12:01,705 INFO L93 Difference]: Finished difference Result 200016 states and 322654 transitions. [2020-10-29 14:12:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:12:01,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-10-29 14:12:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:12:01,983 INFO L225 Difference]: With dead ends: 200016 [2020-10-29 14:12:01,984 INFO L226 Difference]: Without dead ends: 137677 [2020-10-29 14:12:02,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:12:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137677 states. [2020-10-29 14:12:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137677 to 137162. [2020-10-29 14:12:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137162 states. [2020-10-29 14:12:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137162 states to 137162 states and 217306 transitions. [2020-10-29 14:12:11,118 INFO L78 Accepts]: Start accepts. Automaton has 137162 states and 217306 transitions. Word has length 135 [2020-10-29 14:12:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:12:11,118 INFO L481 AbstractCegarLoop]: Abstraction has 137162 states and 217306 transitions. [2020-10-29 14:12:11,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:12:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 137162 states and 217306 transitions. [2020-10-29 14:12:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-29 14:12:11,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:12:11,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:12:11,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 14:12:11,179 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:12:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:12:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1714457184, now seen corresponding path program 1 times [2020-10-29 14:12:11,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:12:11,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963236022] [2020-10-29 14:12:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:12:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:12:11,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:11,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:11,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:12,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:12,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:14,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:16,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:16,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:12:16,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-29 14:12:16,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:12:16,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-29 14:12:16,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:12:16,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:12:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:12:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:12:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-29 14:12:16,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:12:17,048 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:12:17,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:12:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:12:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:12:17,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:12:17,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:12:17,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:12:17,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:12:17,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:12:17,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:12:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:12:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:12:17,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:12:17,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:12:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:12:17,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963236022] [2020-10-29 14:12:17,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:12:17,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:12:17,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850650420] [2020-10-29 14:12:17,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:12:17,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:12:17,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:12:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:12:17,141 INFO L87 Difference]: Start difference. First operand 137162 states and 217306 transitions. Second operand 5 states. [2020-10-29 14:12:25,841 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-29 14:12:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:12:39,055 INFO L93 Difference]: Finished difference Result 401163 states and 634928 transitions. [2020-10-29 14:12:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:12:39,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-10-29 14:12:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:12:39,723 INFO L225 Difference]: With dead ends: 401163 [2020-10-29 14:12:39,723 INFO L226 Difference]: Without dead ends: 268095 [2020-10-29 14:12:39,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:12:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268095 states. [2020-10-29 14:12:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268095 to 268092. [2020-10-29 14:12:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268092 states. [2020-10-29 14:13:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268092 states to 268092 states and 421871 transitions. [2020-10-29 14:13:00,639 INFO L78 Accepts]: Start accepts. Automaton has 268092 states and 421871 transitions. Word has length 139 [2020-10-29 14:13:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:13:00,640 INFO L481 AbstractCegarLoop]: Abstraction has 268092 states and 421871 transitions. [2020-10-29 14:13:00,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:13:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 268092 states and 421871 transitions. [2020-10-29 14:13:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-29 14:13:00,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:13:00,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:13:00,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 14:13:00,788 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:13:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:13:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1698605769, now seen corresponding path program 1 times [2020-10-29 14:13:00,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:13:00,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952146466] [2020-10-29 14:13:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:13:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:13:00,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:00,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:00,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:01,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:01,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:02,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:03,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:03,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:03,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:05,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:13:05,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-29 14:13:05,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:13:05,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 14:13:05,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:13:05,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:13:05,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:13:05,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:13:05,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 14:13:05,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:13:06,562 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-29 14:13:06,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:13:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:13:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:13:06,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:13:06,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:13:06,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:13:06,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 14:13:06,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:13:06,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:13:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:13:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:13:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:13:06,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:13:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:13:06,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952146466] [2020-10-29 14:13:06,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:13:06,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:13:06,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518514125] [2020-10-29 14:13:06,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:13:06,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:13:06,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:13:06,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:13:06,623 INFO L87 Difference]: Start difference. First operand 268092 states and 421871 transitions. Second operand 5 states. [2020-10-29 14:13:21,140 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 295