/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:17:04,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:17:04,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:17:04,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:17:04,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:17:04,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:17:04,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:17:04,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:17:04,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:17:04,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:17:04,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:17:04,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:17:04,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:17:04,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:17:04,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:17:04,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:17:04,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:17:04,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:17:04,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:17:04,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:17:04,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:17:04,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:17:04,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:17:04,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:17:04,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:17:04,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:17:04,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:17:04,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:17:04,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:17:04,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:17:04,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:17:04,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:17:04,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:17:04,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:17:04,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:17:04,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:17:04,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:17:04,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:17:04,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:17:04,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:17:04,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:17:04,206 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 [2020-10-28 19:17:04,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:17:04,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:17:04,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:17:04,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:17:04,243 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:17:04,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:17:04,244 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:17:04,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:17:04,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:17:04,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:17:04,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:17:04,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:17:04,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:17:04,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:17:04,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:17:04,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:17:04,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:17:04,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:17:04,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:17:04,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:17:04,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:17:04,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:17:04,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:17:04,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:17:04,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:17:04,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:17:04,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:17:04,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:17:04,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:17:04,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:17:04,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:17:04,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:17:04,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:17:04,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:17:04,693 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:17:04,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:17:04,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7af562e6/4588c947ed44427b8927953c0964d4a3/FLAG37a13788b [2020-10-28 19:17:05,636 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:17:05,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:17:05,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7af562e6/4588c947ed44427b8927953c0964d4a3/FLAG37a13788b [2020-10-28 19:17:05,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7af562e6/4588c947ed44427b8927953c0964d4a3 [2020-10-28 19:17:05,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:17:05,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:17:05,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:17:05,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:17:05,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:17:05,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:17:05" (1/1) ... [2020-10-28 19:17:05,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e75653d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:05, skipping insertion in model container [2020-10-28 19:17:05,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:17:05" (1/1) ... [2020-10-28 19:17:05,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:17:05,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:17:07,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:17:07,020 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:17:07,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:17:07,508 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:17:07,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07 WrapperNode [2020-10-28 19:17:07,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:17:07,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:17:07,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:17:07,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:17:07,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (1/1) ... [2020-10-28 19:17:07,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (1/1) ... [2020-10-28 19:17:07,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (1/1) ... [2020-10-28 19:17:07,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (1/1) ... [2020-10-28 19:17:07,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (1/1) ... [2020-10-28 19:17:07,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (1/1) ... [2020-10-28 19:17:07,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (1/1) ... [2020-10-28 19:17:07,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:17:07,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:17:07,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:17:07,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:17:07,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (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 [2020-10-28 19:17:07,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:17:07,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:17:07,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:17:07,798 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:17:07,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:17:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:17:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:17:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:17:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:17:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:17:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:17:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:17:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:17:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:17:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:17:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:17:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:17:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:17:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:17:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:17:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:17:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:17:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:17:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:17:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:17:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:17:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:17:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:17:10,449 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:17:10,450 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:17:10,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:17:10 BoogieIcfgContainer [2020-10-28 19:17:10,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:17:10,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:17:10,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:17:10,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:17:10,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:17:05" (1/3) ... [2020-10-28 19:17:10,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9446e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:17:10, skipping insertion in model container [2020-10-28 19:17:10,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:07" (2/3) ... [2020-10-28 19:17:10,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9446e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:17:10, skipping insertion in model container [2020-10-28 19:17:10,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:17:10" (3/3) ... [2020-10-28 19:17:10,461 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:17:10,473 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:17:10,478 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:17:10,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:17:10,525 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:17:10,526 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:17:10,526 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:17:10,526 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:17:10,526 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:17:10,526 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:17:10,526 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:17:10,526 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:17:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states. [2020-10-28 19:17:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-28 19:17:10,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:10,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:17:10,589 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:10,596 INFO L82 PathProgramCache]: Analyzing trace with hash 152479787, now seen corresponding path program 1 times [2020-10-28 19:17:10,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:10,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56180546] [2020-10-28 19:17:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:11,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:13,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:13,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:14,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:14,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:14,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:14,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:14,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:15,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:15,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:15,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:16,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:16,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-28 19:17:16,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:17:16,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 19:17:16,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:16,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:16,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:17:16,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:17:16,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 19:17:16,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:17:17,980 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:17:17,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:18,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:18,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:18,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:18,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:18,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 19:17:18,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:18,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:18,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:18,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:18,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:17:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:17:18,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56180546] [2020-10-28 19:17:18,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:18,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:17:18,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170050468] [2020-10-28 19:17:18,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:17:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:17:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:17:18,374 INFO L87 Difference]: Start difference. First operand 787 states. Second operand 5 states. [2020-10-28 19:17:26,924 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:17:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:29,086 INFO L93 Difference]: Finished difference Result 2288 states and 4056 transitions. [2020-10-28 19:17:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:17:29,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-10-28 19:17:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:29,118 INFO L225 Difference]: With dead ends: 2288 [2020-10-28 19:17:29,118 INFO L226 Difference]: Without dead ends: 1526 [2020-10-28 19:17:29,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:17:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-10-28 19:17:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1523. [2020-10-28 19:17:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1523 states. [2020-10-28 19:17:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2386 transitions. [2020-10-28 19:17:29,326 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2386 transitions. Word has length 313 [2020-10-28 19:17:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:17:29,327 INFO L481 AbstractCegarLoop]: Abstraction has 1523 states and 2386 transitions. [2020-10-28 19:17:29,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:17:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2386 transitions. [2020-10-28 19:17:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 19:17:29,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:29,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:17:29,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:17:29,338 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2109973429, now seen corresponding path program 1 times [2020-10-28 19:17:29,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:29,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077068253] [2020-10-28 19:17:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:29,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:29,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:29,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:30,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:30,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:30,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:30,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:30,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:31,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:31,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:31,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:31,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:32,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:33,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:34,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:34,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 19:17:34,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:17:34,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:17:34,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:34,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:34,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:17:34,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:17:34,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 19:17:34,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:17:35,432 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:17:35,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:35,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:35,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:35,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:35,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:35,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:17:35,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:35,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:35,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:35,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:35,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:17:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:17:35,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077068253] [2020-10-28 19:17:35,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:35,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:17:35,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609770128] [2020-10-28 19:17:35,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:17:35,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:17:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:17:35,769 INFO L87 Difference]: Start difference. First operand 1523 states and 2386 transitions. Second operand 5 states. [2020-10-28 19:17:42,314 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:17:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:44,259 INFO L93 Difference]: Finished difference Result 4474 states and 6998 transitions. [2020-10-28 19:17:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:17:44,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-28 19:17:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:44,280 INFO L225 Difference]: With dead ends: 4474 [2020-10-28 19:17:44,280 INFO L226 Difference]: Without dead ends: 2976 [2020-10-28 19:17:44,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:17:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2020-10-28 19:17:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2973. [2020-10-28 19:17:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-10-28 19:17:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 4624 transitions. [2020-10-28 19:17:44,455 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 4624 transitions. Word has length 315 [2020-10-28 19:17:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:17:44,458 INFO L481 AbstractCegarLoop]: Abstraction has 2973 states and 4624 transitions. [2020-10-28 19:17:44,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:17:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 4624 transitions. [2020-10-28 19:17:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-28 19:17:44,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:44,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:17:44,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:17:44,469 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1840669042, now seen corresponding path program 1 times [2020-10-28 19:17:44,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:44,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831517934] [2020-10-28 19:17:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:44,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:44,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:44,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:44,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:45,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:45,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:45,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:45,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:45,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:46,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:47,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:47,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:49,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:49,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-28 19:17:49,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:17:49,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 19:17:49,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:49,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:17:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 19:17:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 19:17:49,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:17:50,426 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:17:50,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:50,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:50,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:50,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:50,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:50,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:17:50,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:50,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:50,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:50,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:50,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:50,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:17:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:17:50,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831517934] [2020-10-28 19:17:50,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:50,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:17:50,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271604867] [2020-10-28 19:17:50,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:17:50,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:50,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:17:50,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:17:50,713 INFO L87 Difference]: Start difference. First operand 2973 states and 4624 transitions. Second operand 4 states. [2020-10-28 19:17:58,702 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-28 19:18:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:00,577 INFO L93 Difference]: Finished difference Result 8522 states and 13184 transitions. [2020-10-28 19:18:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:18:00,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-10-28 19:18:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:00,610 INFO L225 Difference]: With dead ends: 8522 [2020-10-28 19:18:00,610 INFO L226 Difference]: Without dead ends: 5815 [2020-10-28 19:18:00,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5815 states. [2020-10-28 19:18:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5815 to 5812. [2020-10-28 19:18:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5812 states. [2020-10-28 19:18:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 8984 transitions. [2020-10-28 19:18:00,923 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 8984 transitions. Word has length 317 [2020-10-28 19:18:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:00,924 INFO L481 AbstractCegarLoop]: Abstraction has 5812 states and 8984 transitions. [2020-10-28 19:18:00,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:18:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 8984 transitions. [2020-10-28 19:18:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-28 19:18:00,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:00,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:00,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:18:00,939 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:00,940 INFO L82 PathProgramCache]: Analyzing trace with hash -493923287, now seen corresponding path program 1 times [2020-10-28 19:18:00,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:00,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223956315] [2020-10-28 19:18:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:00,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:01,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:02,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:06,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:06,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-28 19:18:06,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:18:06,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 19:18:06,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:06,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:06,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:18:06,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 19:18:06,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-28 19:18:06,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:18:06,980 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:18:06,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:06,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:07,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:07,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:07,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:07,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:18:07,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:07,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:07,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:07,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:07,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:07,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:18:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:07,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223956315] [2020-10-28 19:18:07,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:07,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:18:07,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776863280] [2020-10-28 19:18:07,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:18:07,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:18:07,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:18:07,248 INFO L87 Difference]: Start difference. First operand 5812 states and 8984 transitions. Second operand 4 states. [2020-10-28 19:18:14,972 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-28 19:18:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:16,907 INFO L93 Difference]: Finished difference Result 16754 states and 25778 transitions. [2020-10-28 19:18:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:18:16,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-10-28 19:18:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:16,962 INFO L225 Difference]: With dead ends: 16754 [2020-10-28 19:18:16,962 INFO L226 Difference]: Without dead ends: 11295 [2020-10-28 19:18:16,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2020-10-28 19:18:17,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 11292. [2020-10-28 19:18:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11292 states. [2020-10-28 19:18:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11292 states to 11292 states and 17326 transitions. [2020-10-28 19:18:17,589 INFO L78 Accepts]: Start accepts. Automaton has 11292 states and 17326 transitions. Word has length 317 [2020-10-28 19:18:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:17,590 INFO L481 AbstractCegarLoop]: Abstraction has 11292 states and 17326 transitions. [2020-10-28 19:18:17,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:18:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 11292 states and 17326 transitions. [2020-10-28 19:18:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-28 19:18:17,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:17,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:17,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:18:17,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1697517380, now seen corresponding path program 1 times [2020-10-28 19:18:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:17,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285180517] [2020-10-28 19:18:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:17,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:18,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:18,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:18,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:18,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:18,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:18,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:19,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:19,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:19,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:19,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:19,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:20,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:20,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:20,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:22,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:22,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-28 19:18:22,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 19:18:22,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 19:18:22,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:22,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:22,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:18:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-28 19:18:22,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:23,506 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:18:23,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:23,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:23,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:23,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:23,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:23,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:18:23,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:23,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:23,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:23,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:23,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:23,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:23,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285180517] [2020-10-28 19:18:23,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:23,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:23,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557639002] [2020-10-28 19:18:23,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:23,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:23,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:23,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:23,707 INFO L87 Difference]: Start difference. First operand 11292 states and 17326 transitions. Second operand 5 states. [2020-10-28 19:18:30,093 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:18:32,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:32,018 INFO L93 Difference]: Finished difference Result 23840 states and 36619 transitions. [2020-10-28 19:18:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:18:32,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-28 19:18:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:32,072 INFO L225 Difference]: With dead ends: 23840 [2020-10-28 19:18:32,072 INFO L226 Difference]: Without dead ends: 12685 [2020-10-28 19:18:32,095 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 [2020-10-28 19:18:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12685 states. [2020-10-28 19:18:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12685 to 11256. [2020-10-28 19:18:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11256 states. [2020-10-28 19:18:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11256 states to 11256 states and 17239 transitions. [2020-10-28 19:18:32,738 INFO L78 Accepts]: Start accepts. Automaton has 11256 states and 17239 transitions. Word has length 317 [2020-10-28 19:18:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:32,739 INFO L481 AbstractCegarLoop]: Abstraction has 11256 states and 17239 transitions. [2020-10-28 19:18:32,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:18:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 11256 states and 17239 transitions. [2020-10-28 19:18:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 19:18:32,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:32,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:32,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:18:32,766 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash 479090856, now seen corresponding path program 1 times [2020-10-28 19:18:32,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:32,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914524008] [2020-10-28 19:18:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:32,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:32,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:37,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:37,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 19:18:37,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:18:37,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 19:18:37,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:37,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:37,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:37,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:18:37,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 19:18:37,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:38,716 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:18:38,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:38,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:38,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:38,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:38,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:38,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:18:38,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:38,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:38,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:38,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:38,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:38,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:18:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:38,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914524008] [2020-10-28 19:18:38,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:38,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:38,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235621920] [2020-10-28 19:18:38,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:38,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:38,889 INFO L87 Difference]: Start difference. First operand 11256 states and 17239 transitions. Second operand 5 states. [2020-10-28 19:18:46,664 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:18:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:48,948 INFO L93 Difference]: Finished difference Result 32478 states and 49505 transitions. [2020-10-28 19:18:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:18:48,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-28 19:18:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:48,995 INFO L225 Difference]: With dead ends: 32478 [2020-10-28 19:18:48,995 INFO L226 Difference]: Without dead ends: 21851 [2020-10-28 19:18:49,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:18:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21851 states. [2020-10-28 19:18:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21851 to 21848. [2020-10-28 19:18:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21848 states. [2020-10-28 19:18:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21848 states to 21848 states and 33181 transitions. [2020-10-28 19:18:50,237 INFO L78 Accepts]: Start accepts. Automaton has 21848 states and 33181 transitions. Word has length 319 [2020-10-28 19:18:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:50,237 INFO L481 AbstractCegarLoop]: Abstraction has 21848 states and 33181 transitions. [2020-10-28 19:18:50,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:18:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 21848 states and 33181 transitions. [2020-10-28 19:18:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-28 19:18:50,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:50,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:18:50,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:18:50,283 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash 152616759, now seen corresponding path program 1 times [2020-10-28 19:18:50,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:50,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933433392] [2020-10-28 19:18:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:50,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:52,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:53,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:55,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:55,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-28 19:18:55,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:18:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:18:55,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:55,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:18:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-28 19:18:55,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:56,190 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:18:56,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:56,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:56,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:56,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:56,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:18:56,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:56,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:56,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:56,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933433392] [2020-10-28 19:18:56,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:56,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:56,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971760435] [2020-10-28 19:18:56,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:56,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:56,445 INFO L87 Difference]: Start difference. First operand 21848 states and 33181 transitions. Second operand 5 states. [2020-10-28 19:19:04,948 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:19:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:07,524 INFO L93 Difference]: Finished difference Result 63340 states and 95787 transitions. [2020-10-28 19:19:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:19:07,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 321 [2020-10-28 19:19:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:07,602 INFO L225 Difference]: With dead ends: 63340 [2020-10-28 19:19:07,602 INFO L226 Difference]: Without dead ends: 42665 [2020-10-28 19:19:07,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:19:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42665 states. [2020-10-28 19:19:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42665 to 42662. [2020-10-28 19:19:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42662 states. [2020-10-28 19:19:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42662 states to 42662 states and 64295 transitions. [2020-10-28 19:19:10,191 INFO L78 Accepts]: Start accepts. Automaton has 42662 states and 64295 transitions. Word has length 321 [2020-10-28 19:19:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:10,192 INFO L481 AbstractCegarLoop]: Abstraction has 42662 states and 64295 transitions. [2020-10-28 19:19:10,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:19:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 42662 states and 64295 transitions. [2020-10-28 19:19:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 19:19:10,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:10,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:19:10,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:19:10,255 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:10,256 INFO L82 PathProgramCache]: Analyzing trace with hash 711038943, now seen corresponding path program 1 times [2020-10-28 19:19:10,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:10,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688948100] [2020-10-28 19:19:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:10,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:10,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:11,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:14,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:14,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:15,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:15,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:15,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-28 19:19:15,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:19:15,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 19:19:15,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:15,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:15,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:19:15,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:19:15,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-28 19:19:15,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:16,125 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:19:16,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:16,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:16,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:16,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:16,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:16,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:19:16,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:16,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:16,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:16,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:16,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:16,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:16,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688948100] [2020-10-28 19:19:16,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:16,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:19:16,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168570845] [2020-10-28 19:19:16,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:19:16,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:19:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:19:16,305 INFO L87 Difference]: Start difference. First operand 42662 states and 64295 transitions. Second operand 5 states. [2020-10-28 19:19:26,553 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:19:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:29,597 INFO L93 Difference]: Finished difference Result 124931 states and 187699 transitions. [2020-10-28 19:19:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:19:29,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-28 19:19:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:29,712 INFO L225 Difference]: With dead ends: 124931 [2020-10-28 19:19:29,713 INFO L226 Difference]: Without dead ends: 83008 [2020-10-28 19:19:29,771 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 [2020-10-28 19:19:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83008 states. [2020-10-28 19:19:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83008 to 83005. [2020-10-28 19:19:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83005 states. [2020-10-28 19:19:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83005 states to 83005 states and 123791 transitions. [2020-10-28 19:19:35,403 INFO L78 Accepts]: Start accepts. Automaton has 83005 states and 123791 transitions. Word has length 323 [2020-10-28 19:19:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:35,404 INFO L481 AbstractCegarLoop]: Abstraction has 83005 states and 123791 transitions. [2020-10-28 19:19:35,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:19:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 83005 states and 123791 transitions. [2020-10-28 19:19:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:19:35,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:35,497 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:19:35,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:19:35,498 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1368716777, now seen corresponding path program 1 times [2020-10-28 19:19:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:35,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469224110] [2020-10-28 19:19:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:35,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:35,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:35,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:36,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:36,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:36,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:36,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:36,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:36,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:37,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:40,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:40,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:19:40,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:19:40,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:19:40,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:40,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:19:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:19:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 19:19:40,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:41,377 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:19:41,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:41,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:41,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:41,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:41,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:41,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:19:41,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:41,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:41,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:41,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469224110] [2020-10-28 19:19:41,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:41,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:19:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424963569] [2020-10-28 19:19:41,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:19:41,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:19:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:19:41,543 INFO L87 Difference]: Start difference. First operand 83005 states and 123791 transitions. Second operand 5 states. [2020-10-28 19:19:57,274 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:20:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:20:02,167 INFO L93 Difference]: Finished difference Result 241116 states and 358132 transitions. [2020-10-28 19:20:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:20:02,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-28 19:20:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:20:02,447 INFO L225 Difference]: With dead ends: 241116 [2020-10-28 19:20:02,447 INFO L226 Difference]: Without dead ends: 162093 [2020-10-28 19:20:02,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:20:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162093 states. [2020-10-28 19:20:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162093 to 162090. [2020-10-28 19:20:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162090 states. [2020-10-28 19:20:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162090 states to 162090 states and 239800 transitions. [2020-10-28 19:20:14,552 INFO L78 Accepts]: Start accepts. Automaton has 162090 states and 239800 transitions. Word has length 325 [2020-10-28 19:20:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:20:14,552 INFO L481 AbstractCegarLoop]: Abstraction has 162090 states and 239800 transitions. [2020-10-28 19:20:14,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:20:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 162090 states and 239800 transitions. [2020-10-28 19:20:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 19:20:14,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:14,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:20:14,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:20:14,932 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:14,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1557147664, now seen corresponding path program 1 times [2020-10-28 19:20:14,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:14,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999651942] [2020-10-28 19:20:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:14,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:17,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:19,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:19,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 19:20:19,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:20:19,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 19:20:19,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:19,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:19,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:20:19,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:20:19,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 19:20:19,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:20,867 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:20:20,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:20,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:20,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:20,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:20,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:20,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:20:20,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:20,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:20,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:20,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:20:21,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999651942] [2020-10-28 19:20:21,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:21,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:20:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087142303] [2020-10-28 19:20:21,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:20:21,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:21,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:20:21,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:21,081 INFO L87 Difference]: Start difference. First operand 162090 states and 239800 transitions. Second operand 5 states. [2020-10-28 19:20:46,294 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 319