/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:45:17,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:45:17,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:45:17,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:45:17,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:45:17,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:45:17,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:45:17,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:45:17,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:45:17,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:45:17,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:45:17,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:45:17,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:45:17,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:45:17,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:45:17,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:45:17,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:45:17,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:45:17,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:45:17,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:45:17,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:45:17,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:45:17,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:45:17,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:45:17,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:45:17,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:45:17,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:45:17,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:45:17,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:45:17,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:45:17,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:45:17,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:45:17,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:45:17,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:45:17,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:45:17,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:45:17,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:45:17,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:45:17,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:45:17,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:45:17,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:45:17,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:45:17,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:45:17,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:45:17,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:45:17,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:45:17,650 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:45:17,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:45:17,650 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:45:17,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:45:17,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:45:17,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:45:17,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:45:17,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:45:17,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:45:17,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:45:17,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:45:17,652 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:45:17,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:45:17,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:45:17,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:45:17,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:45:17,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:45:17,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:45:17,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:45:17,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:45:17,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:45:17,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:45:17,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:45:17,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:45:17,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:45:17,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:45:18,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:45:18,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:45:18,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:45:18,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:45:18,053 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:45:18,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 23:45:18,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0da4b3dea/c95e88b61bdd4d1e97b4dd0a160fc395/FLAGd7e06e70e [2020-10-27 23:45:18,835 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:45:18,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 23:45:18,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0da4b3dea/c95e88b61bdd4d1e97b4dd0a160fc395/FLAGd7e06e70e [2020-10-27 23:45:19,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0da4b3dea/c95e88b61bdd4d1e97b4dd0a160fc395 [2020-10-27 23:45:19,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:45:19,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:45:19,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:45:19,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:45:19,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:45:19,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0ef744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19, skipping insertion in model container [2020-10-27 23:45:19,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:45:19,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:45:19,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:45:19,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:45:19,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:45:19,791 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:45:19,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19 WrapperNode [2020-10-27 23:45:19,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:45:19,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:45:19,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:45:19,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:45:19,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (1/1) ... [2020-10-27 23:45:19,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:45:19,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:45:19,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:45:19,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:45:19,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:45:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:45:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:45:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:45:19,936 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:45:19,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:45:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:45:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:45:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:45:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:45:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:45:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:45:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:45:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:45:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:45:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:45:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:45:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:45:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:45:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:45:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:45:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:45:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:45:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:45:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:45:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:45:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:45:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:45:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:45:20,954 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:45:20,955 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:45:20,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:45:20 BoogieIcfgContainer [2020-10-27 23:45:20,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:45:20,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:45:20,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:45:20,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:45:20,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:45:19" (1/3) ... [2020-10-27 23:45:20,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494df4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:45:20, skipping insertion in model container [2020-10-27 23:45:20,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:19" (2/3) ... [2020-10-27 23:45:20,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494df4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:45:20, skipping insertion in model container [2020-10-27 23:45:20,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:45:20" (3/3) ... [2020-10-27 23:45:20,966 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 23:45:20,977 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:45:20,983 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:45:20,996 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:45:21,023 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:45:21,024 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:45:21,024 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:45:21,024 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:45:21,024 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:45:21,024 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:45:21,024 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:45:21,025 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:45:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-10-27 23:45:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:45:21,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:21,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:21,055 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1557269899, now seen corresponding path program 1 times [2020-10-27 23:45:21,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:21,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571553641] [2020-10-27 23:45:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:21,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:23,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:26,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:26,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:45:26,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:45:26,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:45:26,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:26,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:45:26,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 23:45:26,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:45:26,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 23:45:26,977 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:26,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:27,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:27,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:27,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:27,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:27,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:45:27,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:27,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:27,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:27,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571553641] [2020-10-27 23:45:27,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:27,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:45:27,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248788312] [2020-10-27 23:45:27,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:45:27,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:27,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:45:27,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:45:27,076 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 4 states. [2020-10-27 23:45:27,502 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:45:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:28,626 INFO L93 Difference]: Finished difference Result 256 states and 415 transitions. [2020-10-27 23:45:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:45:28,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 23:45:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:28,641 INFO L225 Difference]: With dead ends: 256 [2020-10-27 23:45:28,641 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 23:45:28,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:45:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 23:45:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-10-27 23:45:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 23:45:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 265 transitions. [2020-10-27 23:45:28,713 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 265 transitions. Word has length 67 [2020-10-27 23:45:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:28,714 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 265 transitions. [2020-10-27 23:45:28,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:45:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 265 transitions. [2020-10-27 23:45:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:45:28,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:28,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:28,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:45:28,718 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:28,719 INFO L82 PathProgramCache]: Analyzing trace with hash -306144703, now seen corresponding path program 1 times [2020-10-27 23:45:28,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:28,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128415113] [2020-10-27 23:45:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:28,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:28,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:28,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:33,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:33,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:45:33,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:45:33,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:45:33,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:33,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:33,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:45:33,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:45:33,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:34,278 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:34,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:34,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:34,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:34,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:34,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:34,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:45:34,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:34,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:34,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:34,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128415113] [2020-10-27 23:45:34,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:34,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:34,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149762625] [2020-10-27 23:45:34,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:34,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:34,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:34,344 INFO L87 Difference]: Start difference. First operand 186 states and 265 transitions. Second operand 7 states. [2020-10-27 23:45:34,810 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:45:35,941 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:45:36,330 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 23:45:36,777 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:37,171 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:45:38,461 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:45:38,864 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:45:39,494 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:45:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:39,578 INFO L93 Difference]: Finished difference Result 1071 states and 1631 transitions. [2020-10-27 23:45:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:39,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-27 23:45:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:39,587 INFO L225 Difference]: With dead ends: 1071 [2020-10-27 23:45:39,587 INFO L226 Difference]: Without dead ends: 931 [2020-10-27 23:45:39,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-10-27 23:45:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 428. [2020-10-27 23:45:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-27 23:45:39,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 638 transitions. [2020-10-27 23:45:39,671 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 638 transitions. Word has length 69 [2020-10-27 23:45:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:39,671 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 638 transitions. [2020-10-27 23:45:39,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 638 transitions. [2020-10-27 23:45:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:45:39,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:39,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:39,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:45:39,683 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash 141757832, now seen corresponding path program 1 times [2020-10-27 23:45:39,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:39,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482933110] [2020-10-27 23:45:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:39,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:40,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:40,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:40,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:42,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:44,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:44,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:44,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:44,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:45:44,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:45:44,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:45:44,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:44,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:45:44,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:45:44,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:45:44,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:45,153 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2020-10-27 23:45:45,588 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:45,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:45,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:45,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:45,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:45,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:45:45,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:45,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482933110] [2020-10-27 23:45:45,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:45,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:45:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537328275] [2020-10-27 23:45:45,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:45:45,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:45:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:45:45,635 INFO L87 Difference]: Start difference. First operand 428 states and 638 transitions. Second operand 10 states. [2020-10-27 23:45:45,776 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-10-27 23:45:46,237 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 23:45:46,765 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-10-27 23:45:47,912 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:45:48,270 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-27 23:45:51,067 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:45:51,228 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-27 23:45:51,378 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-10-27 23:45:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:51,436 INFO L93 Difference]: Finished difference Result 2201 states and 3352 transitions. [2020-10-27 23:45:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 23:45:51,437 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-27 23:45:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:51,453 INFO L225 Difference]: With dead ends: 2201 [2020-10-27 23:45:51,454 INFO L226 Difference]: Without dead ends: 1886 [2020-10-27 23:45:51,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:45:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2020-10-27 23:45:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 429. [2020-10-27 23:45:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 23:45:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 636 transitions. [2020-10-27 23:45:51,539 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 636 transitions. Word has length 70 [2020-10-27 23:45:51,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:51,542 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 636 transitions. [2020-10-27 23:45:51,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:45:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 636 transitions. [2020-10-27 23:45:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:45:51,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:51,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:51,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:45:51,545 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1469661390, now seen corresponding path program 1 times [2020-10-27 23:45:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:51,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077328975] [2020-10-27 23:45:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:51,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:52,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:52,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:56,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:56,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:45:56,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:45:56,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:45:56,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:56,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:45:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:45:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:45:56,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:45:57,084 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2020-10-27 23:45:57,582 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:45:57,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:57,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:57,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:57,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:57,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:57,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:45:57,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:57,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:57,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077328975] [2020-10-27 23:45:57,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:57,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:45:57,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824432101] [2020-10-27 23:45:57,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:45:57,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:57,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:45:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:45:57,622 INFO L87 Difference]: Start difference. First operand 429 states and 636 transitions. Second operand 11 states. [2020-10-27 23:45:58,225 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 23:45:58,599 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-27 23:45:59,650 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:46:01,151 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:01,664 INFO L93 Difference]: Finished difference Result 2771 states and 4199 transitions. [2020-10-27 23:46:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:46:01,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-27 23:46:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:01,680 INFO L225 Difference]: With dead ends: 2771 [2020-10-27 23:46:01,680 INFO L226 Difference]: Without dead ends: 2455 [2020-10-27 23:46:01,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2020-10-27 23:46:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2020-10-27 23:46:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 478. [2020-10-27 23:46:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-10-27 23:46:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 688 transitions. [2020-10-27 23:46:01,754 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 688 transitions. Word has length 70 [2020-10-27 23:46:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:01,755 INFO L481 AbstractCegarLoop]: Abstraction has 478 states and 688 transitions. [2020-10-27 23:46:01,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:46:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 688 transitions. [2020-10-27 23:46:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:46:01,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:01,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:01,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:46:01,757 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1132131651, now seen corresponding path program 1 times [2020-10-27 23:46:01,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:01,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976980540] [2020-10-27 23:46:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:01,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:01,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:02,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:02,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:02,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:04,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:04,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:05,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:06,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:46:06,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:46:06,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:46:06,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:06,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:06,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:46:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:46:06,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:46:07,329 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:07,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:07,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:07,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:07,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:07,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:07,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:46:07,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:07,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:07,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:07,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:07,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:07,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976980540] [2020-10-27 23:46:07,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:07,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:07,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767381450] [2020-10-27 23:46:07,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:07,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:07,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:07,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:07,368 INFO L87 Difference]: Start difference. First operand 478 states and 688 transitions. Second operand 6 states. [2020-10-27 23:46:07,754 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:08,786 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:46:09,227 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:10,450 INFO L93 Difference]: Finished difference Result 1962 states and 2968 transitions. [2020-10-27 23:46:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:46:10,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-27 23:46:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:10,460 INFO L225 Difference]: With dead ends: 1962 [2020-10-27 23:46:10,461 INFO L226 Difference]: Without dead ends: 1677 [2020-10-27 23:46:10,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:46:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2020-10-27 23:46:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 840. [2020-10-27 23:46:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-10-27 23:46:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1240 transitions. [2020-10-27 23:46:10,565 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1240 transitions. Word has length 70 [2020-10-27 23:46:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:10,566 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1240 transitions. [2020-10-27 23:46:10,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1240 transitions. [2020-10-27 23:46:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:46:10,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:10,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:10,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:46:10,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash -602899877, now seen corresponding path program 1 times [2020-10-27 23:46:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:10,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630609494] [2020-10-27 23:46:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:10,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:10,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:10,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:10,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:13,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:15,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:15,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:46:15,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:46:15,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:46:15,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:15,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:46:15,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-27 23:46:15,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 23:46:15,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:16,098 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:16,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:16,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:16,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:16,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:16,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:46:16,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:16,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:16,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:46:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:16,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630609494] [2020-10-27 23:46:16,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:16,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:46:16,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526904212] [2020-10-27 23:46:16,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:46:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:16,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:46:16,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:46:16,149 INFO L87 Difference]: Start difference. First operand 840 states and 1240 transitions. Second operand 4 states. [2020-10-27 23:46:16,902 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:46:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:17,441 INFO L93 Difference]: Finished difference Result 2044 states and 3076 transitions. [2020-10-27 23:46:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:46:17,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 23:46:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:17,449 INFO L225 Difference]: With dead ends: 2044 [2020-10-27 23:46:17,450 INFO L226 Difference]: Without dead ends: 1407 [2020-10-27 23:46:17,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:46:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-10-27 23:46:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1404. [2020-10-27 23:46:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2020-10-27 23:46:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2079 transitions. [2020-10-27 23:46:17,619 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2079 transitions. Word has length 70 [2020-10-27 23:46:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:17,619 INFO L481 AbstractCegarLoop]: Abstraction has 1404 states and 2079 transitions. [2020-10-27 23:46:17,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:46:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2079 transitions. [2020-10-27 23:46:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:46:17,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:17,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:17,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:46:17,627 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash 333879292, now seen corresponding path program 1 times [2020-10-27 23:46:17,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:17,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337032209] [2020-10-27 23:46:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:17,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:18,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:18,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:22,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:22,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:46:22,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:46:22,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:46:22,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:46:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 23:46:22,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:46:22,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:23,039 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:23,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:23,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:23,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:23,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:23,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:23,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:46:23,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:23,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:23,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337032209] [2020-10-27 23:46:23,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:23,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:46:23,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822009089] [2020-10-27 23:46:23,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:46:23,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:46:23,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:46:23,072 INFO L87 Difference]: Start difference. First operand 1404 states and 2079 transitions. Second operand 4 states. [2020-10-27 23:46:23,476 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:46:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:24,479 INFO L93 Difference]: Finished difference Result 3221 states and 4824 transitions. [2020-10-27 23:46:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:46:24,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 23:46:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:24,489 INFO L225 Difference]: With dead ends: 3221 [2020-10-27 23:46:24,489 INFO L226 Difference]: Without dead ends: 2020 [2020-10-27 23:46:24,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:46:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-27 23:46:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2017. [2020-10-27 23:46:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2017 states. [2020-10-27 23:46:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 2988 transitions. [2020-10-27 23:46:24,701 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 2988 transitions. Word has length 70 [2020-10-27 23:46:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:24,701 INFO L481 AbstractCegarLoop]: Abstraction has 2017 states and 2988 transitions. [2020-10-27 23:46:24,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:46:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 2988 transitions. [2020-10-27 23:46:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:46:24,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:24,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:24,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:46:24,703 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash 982857703, now seen corresponding path program 1 times [2020-10-27 23:46:24,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:24,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270130951] [2020-10-27 23:46:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:24,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:24,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:24,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:24,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:25,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:25,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:25,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:26,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:26,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:29,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:29,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:29,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:29,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:29,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:46:29,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:46:29,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:46:29,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:29,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:46:29,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:46:29,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:46:29,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:30,312 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:30,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:30,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:30,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:30,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:30,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:46:30,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:30,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:30,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:30,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:30,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:30,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270130951] [2020-10-27 23:46:30,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:30,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:46:30,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634397770] [2020-10-27 23:46:30,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:46:30,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:46:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:46:30,345 INFO L87 Difference]: Start difference. First operand 2017 states and 2988 transitions. Second operand 10 states. [2020-10-27 23:46:30,786 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:46:32,185 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:46:33,914 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:34,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:34,961 INFO L93 Difference]: Finished difference Result 20154 states and 30172 transitions. [2020-10-27 23:46:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:46:34,962 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-27 23:46:34,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:35,041 INFO L225 Difference]: With dead ends: 20154 [2020-10-27 23:46:35,041 INFO L226 Difference]: Without dead ends: 18276 [2020-10-27 23:46:35,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:46:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18276 states. [2020-10-27 23:46:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18276 to 2091. [2020-10-27 23:46:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2020-10-27 23:46:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 3029 transitions. [2020-10-27 23:46:35,559 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 3029 transitions. Word has length 70 [2020-10-27 23:46:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:35,559 INFO L481 AbstractCegarLoop]: Abstraction has 2091 states and 3029 transitions. [2020-10-27 23:46:35,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:46:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 3029 transitions. [2020-10-27 23:46:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:46:35,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:35,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:35,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:46:35,562 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1665284041, now seen corresponding path program 1 times [2020-10-27 23:46:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:35,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95260990] [2020-10-27 23:46:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:36,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:38,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:40,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:46:40,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:46:40,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:46:40,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:40,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:46:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:46:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:46:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:41,026 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:41,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:41,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:41,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:41,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:41,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:41,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:46:41,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:41,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:41,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:41,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:41,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:41,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95260990] [2020-10-27 23:46:41,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:41,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:46:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713980862] [2020-10-27 23:46:41,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:46:41,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:46:41,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:46:41,057 INFO L87 Difference]: Start difference. First operand 2091 states and 3029 transitions. Second operand 7 states. [2020-10-27 23:46:41,536 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:46:42,567 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 23:46:43,025 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:46:43,422 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:46:43,831 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:45,364 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 23:46:45,811 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:46:46,819 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 23:46:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:46,910 INFO L93 Difference]: Finished difference Result 12364 states and 18236 transitions. [2020-10-27 23:46:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:46:46,911 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-27 23:46:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:46,933 INFO L225 Difference]: With dead ends: 12364 [2020-10-27 23:46:46,933 INFO L226 Difference]: Without dead ends: 10742 [2020-10-27 23:46:46,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:46:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10742 states. [2020-10-27 23:46:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10742 to 3437. [2020-10-27 23:46:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3437 states. [2020-10-27 23:46:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4979 transitions. [2020-10-27 23:46:47,564 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4979 transitions. Word has length 70 [2020-10-27 23:46:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:47,564 INFO L481 AbstractCegarLoop]: Abstraction has 3437 states and 4979 transitions. [2020-10-27 23:46:47,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4979 transitions. [2020-10-27 23:46:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:46:47,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:47,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:47,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:46:47,567 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:47,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash -123953312, now seen corresponding path program 1 times [2020-10-27 23:46:47,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:47,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493717556] [2020-10-27 23:46:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:47,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:47,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:49,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:49,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:49,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:49,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:52,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:46:52,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:46:52,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:46:52,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:52,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:52,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:46:52,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:46:52,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:53,016 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:53,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:53,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:53,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:53,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:53,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:53,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:46:53,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:53,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:53,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:53,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:53,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:53,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493717556] [2020-10-27 23:46:53,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:53,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:53,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379628621] [2020-10-27 23:46:53,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:53,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:53,046 INFO L87 Difference]: Start difference. First operand 3437 states and 4979 transitions. Second operand 6 states. [2020-10-27 23:46:53,481 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:54,821 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:46:55,237 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:46:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:58,759 INFO L93 Difference]: Finished difference Result 24606 states and 36192 transitions. [2020-10-27 23:46:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:46:58,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 23:46:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:58,805 INFO L225 Difference]: With dead ends: 24606 [2020-10-27 23:46:58,806 INFO L226 Difference]: Without dead ends: 21989 [2020-10-27 23:46:58,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:46:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21989 states. [2020-10-27 23:47:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21989 to 11229. [2020-10-27 23:47:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11229 states. [2020-10-27 23:47:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11229 states to 11229 states and 16425 transitions. [2020-10-27 23:47:00,483 INFO L78 Accepts]: Start accepts. Automaton has 11229 states and 16425 transitions. Word has length 71 [2020-10-27 23:47:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:00,484 INFO L481 AbstractCegarLoop]: Abstraction has 11229 states and 16425 transitions. [2020-10-27 23:47:00,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 11229 states and 16425 transitions. [2020-10-27 23:47:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:47:00,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:00,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:00,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:47:00,488 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:00,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1763858972, now seen corresponding path program 1 times [2020-10-27 23:47:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:00,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648189390] [2020-10-27 23:47:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:00,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:00,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:02,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:02,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:02,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:03,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:03,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:05,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:47:05,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:47:05,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:47:05,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:47:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:47:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:47:05,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:05,891 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 24 [2020-10-27 23:47:06,466 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:47:06,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:06,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:06,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:06,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:06,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:47:06,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:06,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:06,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:06,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:06,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:06,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648189390] [2020-10-27 23:47:06,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:06,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:47:06,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937547421] [2020-10-27 23:47:06,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:47:06,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:06,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:47:06,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:47:06,508 INFO L87 Difference]: Start difference. First operand 11229 states and 16425 transitions. Second operand 12 states. [2020-10-27 23:47:06,677 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-27 23:47:06,825 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-27 23:47:07,851 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 171 [2020-10-27 23:47:08,316 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-10-27 23:47:08,506 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-27 23:47:08,737 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-27 23:47:09,109 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-27 23:47:09,394 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-27 23:47:09,559 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-10-27 23:47:09,757 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-27 23:47:09,976 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-27 23:47:10,134 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-10-27 23:47:10,397 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-10-27 23:47:11,238 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:47:11,730 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 23:47:12,317 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 23:47:20,225 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 23:47:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:28,159 INFO L93 Difference]: Finished difference Result 87469 states and 126340 transitions. [2020-10-27 23:47:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 23:47:28,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-27 23:47:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:28,300 INFO L225 Difference]: With dead ends: 87469 [2020-10-27 23:47:28,300 INFO L226 Difference]: Without dead ends: 77334 [2020-10-27 23:47:28,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 23:47:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77334 states. [2020-10-27 23:47:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77334 to 11253. [2020-10-27 23:47:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11253 states. [2020-10-27 23:47:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11253 states to 11253 states and 16449 transitions. [2020-10-27 23:47:31,137 INFO L78 Accepts]: Start accepts. Automaton has 11253 states and 16449 transitions. Word has length 71 [2020-10-27 23:47:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:31,138 INFO L481 AbstractCegarLoop]: Abstraction has 11253 states and 16449 transitions. [2020-10-27 23:47:31,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:47:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 11253 states and 16449 transitions. [2020-10-27 23:47:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:47:31,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:31,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:31,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:47:31,142 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:31,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1568236321, now seen corresponding path program 1 times [2020-10-27 23:47:31,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:31,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600368453] [2020-10-27 23:47:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:31,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:36,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:36,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:47:36,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:47:36,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:47:36,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:47:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 23:47:36,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:36,596 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:47:36,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:36,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:36,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:36,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:36,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:36,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:47:36,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:36,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:36,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:36,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:36,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:36,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600368453] [2020-10-27 23:47:36,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:36,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:47:36,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344821579] [2020-10-27 23:47:36,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:36,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:36,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:36,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:36,618 INFO L87 Difference]: Start difference. First operand 11253 states and 16449 transitions. Second operand 6 states. [2020-10-27 23:47:37,147 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:47:38,821 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:47:39,310 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:47:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:53,148 INFO L93 Difference]: Finished difference Result 96299 states and 142074 transitions. [2020-10-27 23:47:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:47:53,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 23:47:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:53,307 INFO L225 Difference]: With dead ends: 96299 [2020-10-27 23:47:53,307 INFO L226 Difference]: Without dead ends: 85449 [2020-10-27 23:47:53,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:47:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85449 states. [2020-10-27 23:48:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85449 to 43300. [2020-10-27 23:48:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43300 states. [2020-10-27 23:48:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43300 states to 43300 states and 63597 transitions. [2020-10-27 23:48:01,316 INFO L78 Accepts]: Start accepts. Automaton has 43300 states and 63597 transitions. Word has length 71 [2020-10-27 23:48:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:01,317 INFO L481 AbstractCegarLoop]: Abstraction has 43300 states and 63597 transitions. [2020-10-27 23:48:01,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:48:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 43300 states and 63597 transitions. [2020-10-27 23:48:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:48:01,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:01,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:48:01,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:48:01,324 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:01,324 INFO L82 PathProgramCache]: Analyzing trace with hash -43182901, now seen corresponding path program 1 times [2020-10-27 23:48:01,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:01,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705085877] [2020-10-27 23:48:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:01,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:01,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:01,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:01,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:02,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:02,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:02,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:02,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:05,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:06,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:06,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:48:06,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:48:06,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-27 23:48:06,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:48:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:48:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:48:06,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:06,868 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:48:06,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:06,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:06,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:06,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:06,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:48:06,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:06,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:06,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705085877] [2020-10-27 23:48:06,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:06,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:48:06,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774227245] [2020-10-27 23:48:06,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:48:06,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:06,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:48:06,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:48:06,905 INFO L87 Difference]: Start difference. First operand 43300 states and 63597 transitions. Second operand 6 states. [2020-10-27 23:48:07,323 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:48:09,090 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 23:48:09,618 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:48:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:39,011 INFO L93 Difference]: Finished difference Result 198687 states and 292427 transitions. [2020-10-27 23:48:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:48:39,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 23:48:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:39,388 INFO L225 Difference]: With dead ends: 198687 [2020-10-27 23:48:39,388 INFO L226 Difference]: Without dead ends: 180400 [2020-10-27 23:48:39,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:48:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180400 states. [2020-10-27 23:48:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180400 to 70686. [2020-10-27 23:48:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70686 states. [2020-10-27 23:48:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70686 states to 70686 states and 103775 transitions. [2020-10-27 23:48:52,076 INFO L78 Accepts]: Start accepts. Automaton has 70686 states and 103775 transitions. Word has length 71 [2020-10-27 23:48:52,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:52,077 INFO L481 AbstractCegarLoop]: Abstraction has 70686 states and 103775 transitions. [2020-10-27 23:48:52,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:48:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 70686 states and 103775 transitions. [2020-10-27 23:48:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:48:52,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:52,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:48:52,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:48:52,087 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:52,087 INFO L82 PathProgramCache]: Analyzing trace with hash 294346838, now seen corresponding path program 1 times [2020-10-27 23:48:52,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:52,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623072503] [2020-10-27 23:48:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:52,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:53,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:57,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:57,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:48:57,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:48:57,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:48:57,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:48:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:48:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:48:57,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:57,544 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:48:57,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:57,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:57,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:57,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:57,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:57,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:48:57,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:57,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:57,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:57,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623072503] [2020-10-27 23:48:57,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:57,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:48:57,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265078866] [2020-10-27 23:48:57,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:48:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:48:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:48:57,567 INFO L87 Difference]: Start difference. First operand 70686 states and 103775 transitions. Second operand 7 states. [2020-10-27 23:48:58,024 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 149