/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:18:22,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:18:22,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:18:22,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:18:22,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:18:22,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:18:22,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:18:22,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:18:22,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:18:22,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:18:22,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:18:22,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:18:22,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:18:22,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:18:22,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:18:22,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:18:22,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:18:22,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:18:22,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:18:22,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:18:22,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:18:22,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:18:22,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:18:22,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:18:22,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:18:22,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:18:22,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:18:22,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:18:22,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:18:22,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:18:22,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:18:22,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:18:22,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:18:22,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:18:22,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:18:22,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:18:22,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:18:22,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:18:22,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:18:22,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:18:22,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:18:22,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:18:22,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:18:22,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:18:22,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:18:22,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:18:22,260 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:18:22,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:18:22,260 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:18:22,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:18:22,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:18:22,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:18:22,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:18:22,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:18:22,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:18:22,262 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:18:22,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:18:22,263 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:18:22,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:18:22,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:18:22,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:18:22,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:18:22,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:18:22,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:18:22,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:18:22,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:18:22,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:18:22,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:18:22,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:18:22,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:18:22,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:18:22,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:18:22,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:18:22,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:18:22,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:18:22,736 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:18:22,737 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:18:22,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 05:18:22,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7846584bc/671d340a81de403190e6540c818fee50/FLAGf1ae59a0e [2020-10-27 05:18:23,601 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:18:23,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 05:18:23,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7846584bc/671d340a81de403190e6540c818fee50/FLAGf1ae59a0e [2020-10-27 05:18:23,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7846584bc/671d340a81de403190e6540c818fee50 [2020-10-27 05:18:23,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:18:23,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:18:23,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:18:23,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:18:23,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:18:23,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:18:23" (1/1) ... [2020-10-27 05:18:23,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab36c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:23, skipping insertion in model container [2020-10-27 05:18:23,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:18:23" (1/1) ... [2020-10-27 05:18:23,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:18:23,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:18:24,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:18:24,378 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:18:24,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:18:24,515 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:18:24,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24 WrapperNode [2020-10-27 05:18:24,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:18:24,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:18:24,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:18:24,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:18:24,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (1/1) ... [2020-10-27 05:18:24,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (1/1) ... [2020-10-27 05:18:24,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (1/1) ... [2020-10-27 05:18:24,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (1/1) ... [2020-10-27 05:18:24,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (1/1) ... [2020-10-27 05:18:24,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (1/1) ... [2020-10-27 05:18:24,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (1/1) ... [2020-10-27 05:18:24,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:18:24,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:18:24,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:18:24,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:18:24,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:18:24,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:18:24,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:18:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:18:24,727 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:18:24,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:18:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:18:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:18:24,728 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:18:24,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:18:24,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:18:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:18:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:18:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:18:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:18:24,731 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:18:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:18:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:18:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:18:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:18:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:18:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:18:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:18:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:18:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:18:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:18:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:18:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:18:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:18:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:18:25,773 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:18:25,773 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:18:25,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:18:25 BoogieIcfgContainer [2020-10-27 05:18:25,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:18:25,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:18:25,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:18:25,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:18:25,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:18:23" (1/3) ... [2020-10-27 05:18:25,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9dc527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:18:25, skipping insertion in model container [2020-10-27 05:18:25,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:18:24" (2/3) ... [2020-10-27 05:18:25,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9dc527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:18:25, skipping insertion in model container [2020-10-27 05:18:25,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:18:25" (3/3) ... [2020-10-27 05:18:25,785 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 05:18:25,797 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:18:25,803 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:18:25,817 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:18:25,847 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:18:25,847 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:18:25,847 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:18:25,848 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:18:25,848 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:18:25,848 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:18:25,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:18:25,848 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:18:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-10-27 05:18:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:18:25,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:25,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:25,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 691850863, now seen corresponding path program 1 times [2020-10-27 05:18:25,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:25,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108162653] [2020-10-27 05:18:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:26,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:26,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:26,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:27,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:27,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:27,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:27,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:30,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:30,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:30,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:31,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:31,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:31,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:18:31,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:18:31,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 05:18:31,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:31,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:18:31,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:31,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:18:31,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:18:31,870 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:18:31,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:31,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:31,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:31,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:31,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:31,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 05:18:31,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:31,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:31,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:31,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:31,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:32,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108162653] [2020-10-27 05:18:32,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:32,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:18:32,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852018778] [2020-10-27 05:18:32,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:18:32,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:32,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:18:32,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:18:32,048 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 6 states. [2020-10-27 05:18:32,448 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:18:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:33,551 INFO L93 Difference]: Finished difference Result 273 states and 450 transitions. [2020-10-27 05:18:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:18:33,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:18:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:33,565 INFO L225 Difference]: With dead ends: 273 [2020-10-27 05:18:33,566 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 05:18:33,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:18:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 05:18:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-27 05:18:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 05:18:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 205 transitions. [2020-10-27 05:18:33,633 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 205 transitions. Word has length 81 [2020-10-27 05:18:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:33,633 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 205 transitions. [2020-10-27 05:18:33,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:18:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 205 transitions. [2020-10-27 05:18:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:18:33,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:33,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:33,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:18:33,638 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:33,639 INFO L82 PathProgramCache]: Analyzing trace with hash -959446568, now seen corresponding path program 1 times [2020-10-27 05:18:33,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:33,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756439491] [2020-10-27 05:18:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:33,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:33,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:33,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:33,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:34,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:34,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:37,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:37,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:38,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:38,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:18:38,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:18:38,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 05:18:38,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:18:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:38,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:18:38,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:18:39,143 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:18:39,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:39,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:39,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:39,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:39,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:39,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:18:39,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:39,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:39,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:39,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:39,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:39,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756439491] [2020-10-27 05:18:39,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:39,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:18:39,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766270242] [2020-10-27 05:18:39,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:18:39,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:39,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:18:39,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:18:39,232 INFO L87 Difference]: Start difference. First operand 152 states and 205 transitions. Second operand 6 states. [2020-10-27 05:18:39,573 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:18:40,443 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:18:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:40,982 INFO L93 Difference]: Finished difference Result 335 states and 481 transitions. [2020-10-27 05:18:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:18:40,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:18:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:40,987 INFO L225 Difference]: With dead ends: 335 [2020-10-27 05:18:40,987 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 05:18:40,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:18:40,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 05:18:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2020-10-27 05:18:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-27 05:18:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2020-10-27 05:18:41,030 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 82 [2020-10-27 05:18:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:41,032 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2020-10-27 05:18:41,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:18:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2020-10-27 05:18:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:18:41,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:41,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:41,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:18:41,037 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:41,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1048345440, now seen corresponding path program 1 times [2020-10-27 05:18:41,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:41,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135164857] [2020-10-27 05:18:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:41,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:41,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:41,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:41,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:42,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:46,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:46,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:18:46,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:18:46,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:18:46,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:46,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:18:46,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:46,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:18:46,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:46,437 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:18:46,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:46,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:46,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:46,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:46,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:18:46,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:46,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:46,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:46,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:46,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:18:46,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135164857] [2020-10-27 05:18:46,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:46,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:18:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072700936] [2020-10-27 05:18:46,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:18:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:18:46,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:18:46,516 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand 6 states. [2020-10-27 05:18:46,833 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:18:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:47,584 INFO L93 Difference]: Finished difference Result 398 states and 584 transitions. [2020-10-27 05:18:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:18:47,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 05:18:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:47,590 INFO L225 Difference]: With dead ends: 398 [2020-10-27 05:18:47,591 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 05:18:47,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:18:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 05:18:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-27 05:18:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-27 05:18:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 317 transitions. [2020-10-27 05:18:47,622 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 317 transitions. Word has length 83 [2020-10-27 05:18:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:47,622 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 317 transitions. [2020-10-27 05:18:47,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:18:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 317 transitions. [2020-10-27 05:18:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:18:47,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:47,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:47,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:18:47,626 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1004114742, now seen corresponding path program 1 times [2020-10-27 05:18:47,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:47,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235772476] [2020-10-27 05:18:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:47,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:47,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:47,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:47,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:47,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:52,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:52,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:52,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:52,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:18:52,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:18:52,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:18:52,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:18:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:18:52,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:18:52,988 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:18:52,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:53,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:53,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:53,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:53,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:53,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:18:53,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:53,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:53,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:53,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:53,048 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 05:18:53,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235772476] [2020-10-27 05:18:53,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:53,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:18:53,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208442034] [2020-10-27 05:18:53,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:18:53,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:18:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:18:53,052 INFO L87 Difference]: Start difference. First operand 226 states and 317 transitions. Second operand 6 states. [2020-10-27 05:18:53,386 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:18:54,152 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:18:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:54,500 INFO L93 Difference]: Finished difference Result 565 states and 830 transitions. [2020-10-27 05:18:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:18:54,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-27 05:18:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:54,504 INFO L225 Difference]: With dead ends: 565 [2020-10-27 05:18:54,505 INFO L226 Difference]: Without dead ends: 381 [2020-10-27 05:18:54,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:18:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-27 05:18:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 378. [2020-10-27 05:18:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-27 05:18:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 551 transitions. [2020-10-27 05:18:54,573 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 551 transitions. Word has length 84 [2020-10-27 05:18:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:54,573 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 551 transitions. [2020-10-27 05:18:54,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:18:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 551 transitions. [2020-10-27 05:18:54,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:18:54,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:54,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:18:54,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:18:54,579 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash 184542477, now seen corresponding path program 1 times [2020-10-27 05:18:54,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:54,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775857617] [2020-10-27 05:18:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:54,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:55,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:56,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:56,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:56,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:56,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:58,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:59,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:59,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:18:59,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:18:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:18:59,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:18:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:18:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:00,183 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:19:00,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:00,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:00,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:00,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:00,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:00,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 05:19:00,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:19:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:00,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775857617] [2020-10-27 05:19:00,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:00,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:19:00,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817595994] [2020-10-27 05:19:00,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:19:00,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:00,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:19:00,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:19:00,319 INFO L87 Difference]: Start difference. First operand 378 states and 551 transitions. Second operand 11 states. [2020-10-27 05:19:00,711 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:19:01,852 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:19:02,160 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:19:03,187 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:19:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:03,293 INFO L93 Difference]: Finished difference Result 1002 states and 1510 transitions. [2020-10-27 05:19:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:19:03,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-27 05:19:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:03,306 INFO L225 Difference]: With dead ends: 1002 [2020-10-27 05:19:03,306 INFO L226 Difference]: Without dead ends: 735 [2020-10-27 05:19:03,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:19:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2020-10-27 05:19:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 378. [2020-10-27 05:19:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-27 05:19:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 549 transitions. [2020-10-27 05:19:03,367 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 549 transitions. Word has length 85 [2020-10-27 05:19:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:03,368 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 549 transitions. [2020-10-27 05:19:03,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:19:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 549 transitions. [2020-10-27 05:19:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:19:03,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:03,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:03,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:19:03,370 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:03,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1541014984, now seen corresponding path program 1 times [2020-10-27 05:19:03,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:03,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215044997] [2020-10-27 05:19:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:03,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:03,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:03,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:03,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:03,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:03,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:04,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:04,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:04,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:05,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:05,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:05,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:07,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:08,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:08,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:19:08,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:19:08,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:19:08,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:19:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:19:08,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:08,722 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:19:08,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:08,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:08,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:08,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:08,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:08,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:19:08,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:08,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:08,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:08,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:08,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:08,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215044997] [2020-10-27 05:19:08,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:08,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:19:08,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937733557] [2020-10-27 05:19:08,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:19:08,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:19:08,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:19:08,790 INFO L87 Difference]: Start difference. First operand 378 states and 549 transitions. Second operand 6 states. [2020-10-27 05:19:09,090 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:19:09,812 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:19:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:10,214 INFO L93 Difference]: Finished difference Result 933 states and 1397 transitions. [2020-10-27 05:19:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:19:10,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:19:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:10,219 INFO L225 Difference]: With dead ends: 933 [2020-10-27 05:19:10,219 INFO L226 Difference]: Without dead ends: 613 [2020-10-27 05:19:10,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:19:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2020-10-27 05:19:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 610. [2020-10-27 05:19:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-10-27 05:19:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 900 transitions. [2020-10-27 05:19:10,290 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 900 transitions. Word has length 86 [2020-10-27 05:19:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:10,292 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 900 transitions. [2020-10-27 05:19:10,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:19:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 900 transitions. [2020-10-27 05:19:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:19:10,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:10,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:10,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:19:10,296 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1701625957, now seen corresponding path program 1 times [2020-10-27 05:19:10,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:10,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233295909] [2020-10-27 05:19:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:10,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:15,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:15,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:19:15,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:19:15,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:19:15,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:19:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:19:15,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:15,795 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:19:15,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:15,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:15,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:15,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:15,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:19:15,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:15,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:15,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:15,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233295909] [2020-10-27 05:19:15,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:15,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:19:15,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980029339] [2020-10-27 05:19:15,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:19:15,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:15,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:19:15,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:19:15,872 INFO L87 Difference]: Start difference. First operand 610 states and 900 transitions. Second operand 11 states. [2020-10-27 05:19:16,270 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:19:17,452 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:19:17,814 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:19:19,319 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:19:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:19,458 INFO L93 Difference]: Finished difference Result 1823 states and 2754 transitions. [2020-10-27 05:19:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:19:19,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-27 05:19:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:19,472 INFO L225 Difference]: With dead ends: 1823 [2020-10-27 05:19:19,472 INFO L226 Difference]: Without dead ends: 1312 [2020-10-27 05:19:19,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:19:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2020-10-27 05:19:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 610. [2020-10-27 05:19:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-10-27 05:19:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 896 transitions. [2020-10-27 05:19:19,559 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 896 transitions. Word has length 87 [2020-10-27 05:19:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:19,559 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 896 transitions. [2020-10-27 05:19:19,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:19:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 896 transitions. [2020-10-27 05:19:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 05:19:19,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:19,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:19,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:19:19,561 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash 487709124, now seen corresponding path program 1 times [2020-10-27 05:19:19,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:19,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339220732] [2020-10-27 05:19:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:19,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:19,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:19,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:20,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:24,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:24,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 05:19:24,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:19:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:19:24,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:19:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:19:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:25,183 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:19:25,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:25,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:25,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:25,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:25,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:25,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:19:25,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:25,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:25,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:25,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339220732] [2020-10-27 05:19:25,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:25,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:19:25,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216375215] [2020-10-27 05:19:25,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:19:25,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:25,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:19:25,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:19:25,264 INFO L87 Difference]: Start difference. First operand 610 states and 896 transitions. Second operand 13 states. [2020-10-27 05:19:26,078 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 184 [2020-10-27 05:19:26,890 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 05:19:28,728 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 187 [2020-10-27 05:19:29,109 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:19:33,745 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 182 [2020-10-27 05:19:34,094 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:19:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:34,987 INFO L93 Difference]: Finished difference Result 7590 states and 11204 transitions. [2020-10-27 05:19:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 05:19:34,987 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2020-10-27 05:19:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:35,025 INFO L225 Difference]: With dead ends: 7590 [2020-10-27 05:19:35,025 INFO L226 Difference]: Without dead ends: 7099 [2020-10-27 05:19:35,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=702, Invalid=2838, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 05:19:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2020-10-27 05:19:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 622. [2020-10-27 05:19:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2020-10-27 05:19:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 908 transitions. [2020-10-27 05:19:35,219 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 908 transitions. Word has length 88 [2020-10-27 05:19:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:35,219 INFO L481 AbstractCegarLoop]: Abstraction has 622 states and 908 transitions. [2020-10-27 05:19:35,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:19:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 908 transitions. [2020-10-27 05:19:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 05:19:35,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:35,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:35,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:19:35,221 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:35,222 INFO L82 PathProgramCache]: Analyzing trace with hash 445126388, now seen corresponding path program 1 times [2020-10-27 05:19:35,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:35,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063653239] [2020-10-27 05:19:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:35,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:35,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:35,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:35,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:40,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:40,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 05:19:40,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:19:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:19:40,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:19:40,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:40,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:19:40,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:40,718 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:19:40,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:40,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:40,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:40,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:40,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:40,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:19:40,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:40,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:40,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:40,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063653239] [2020-10-27 05:19:40,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:40,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:19:40,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125673830] [2020-10-27 05:19:40,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:19:40,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:40,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:19:40,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:19:40,802 INFO L87 Difference]: Start difference. First operand 622 states and 908 transitions. Second operand 11 states. [2020-10-27 05:19:41,164 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:19:42,475 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:19:42,806 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:19:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:43,819 INFO L93 Difference]: Finished difference Result 1640 states and 2452 transitions. [2020-10-27 05:19:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:19:43,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-10-27 05:19:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:43,827 INFO L225 Difference]: With dead ends: 1640 [2020-10-27 05:19:43,827 INFO L226 Difference]: Without dead ends: 1149 [2020-10-27 05:19:43,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:19:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-10-27 05:19:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 610. [2020-10-27 05:19:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-10-27 05:19:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 892 transitions. [2020-10-27 05:19:43,951 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 892 transitions. Word has length 89 [2020-10-27 05:19:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:43,951 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 892 transitions. [2020-10-27 05:19:43,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:19:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 892 transitions. [2020-10-27 05:19:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 05:19:43,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:43,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:43,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:19:43,953 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:43,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1848516943, now seen corresponding path program 1 times [2020-10-27 05:19:43,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:43,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550540505] [2020-10-27 05:19:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:44,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:44,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:44,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:44,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:48,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:48,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 05:19:48,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:19:48,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:19:48,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:19:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:19:48,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:49,405 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:19:49,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:49,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:49,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:49,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:49,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:19:49,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:49,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:49,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:49,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:49,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:49,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550540505] [2020-10-27 05:19:49,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:49,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:19:49,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693644991] [2020-10-27 05:19:49,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:19:49,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:19:49,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:19:49,458 INFO L87 Difference]: Start difference. First operand 610 states and 892 transitions. Second operand 10 states. [2020-10-27 05:19:49,822 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:19:50,899 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:19:51,219 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:19:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:51,781 INFO L93 Difference]: Finished difference Result 1347 states and 2015 transitions. [2020-10-27 05:19:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:19:51,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-10-27 05:19:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:51,786 INFO L225 Difference]: With dead ends: 1347 [2020-10-27 05:19:51,786 INFO L226 Difference]: Without dead ends: 845 [2020-10-27 05:19:51,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-10-27 05:19:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-10-27 05:19:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 610. [2020-10-27 05:19:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-10-27 05:19:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 891 transitions. [2020-10-27 05:19:51,914 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 891 transitions. Word has length 89 [2020-10-27 05:19:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:51,914 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 891 transitions. [2020-10-27 05:19:51,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:19:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 891 transitions. [2020-10-27 05:19:51,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:19:51,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:51,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:51,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:19:51,916 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash 161939590, now seen corresponding path program 1 times [2020-10-27 05:19:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:51,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602933350] [2020-10-27 05:19:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:51,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:55,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:55,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:19:55,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:19:55,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3193 [2020-10-27 05:19:55,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:19:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 05:19:55,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:55,641 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:19:55,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:55,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:55,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:55,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:55,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:19:55,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:55,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:55,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:55,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:19:55,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602933350] [2020-10-27 05:19:55,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:55,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:19:55,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153394099] [2020-10-27 05:19:55,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:19:55,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:55,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:19:55,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:19:55,701 INFO L87 Difference]: Start difference. First operand 610 states and 891 transitions. Second operand 11 states. [2020-10-27 05:19:56,079 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:19:57,169 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:19:57,496 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:19:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:58,524 INFO L93 Difference]: Finished difference Result 1584 states and 2371 transitions. [2020-10-27 05:19:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:19:58,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 90 [2020-10-27 05:19:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:58,531 INFO L225 Difference]: With dead ends: 1584 [2020-10-27 05:19:58,531 INFO L226 Difference]: Without dead ends: 1117 [2020-10-27 05:19:58,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:19:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2020-10-27 05:19:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 610. [2020-10-27 05:19:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-10-27 05:19:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 887 transitions. [2020-10-27 05:19:58,682 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 887 transitions. Word has length 90 [2020-10-27 05:19:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:58,682 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 887 transitions. [2020-10-27 05:19:58,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:19:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 887 transitions. [2020-10-27 05:19:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:19:58,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:58,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:19:58,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:19:58,684 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:58,685 INFO L82 PathProgramCache]: Analyzing trace with hash 658343801, now seen corresponding path program 1 times [2020-10-27 05:19:58,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:58,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79807011] [2020-10-27 05:19:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:58,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:58,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:59,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:03,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:03,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:20:03,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:20:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:20:03,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 05:20:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:20:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:20:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:04,201 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-27 05:20:04,507 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-27 05:20:04,844 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-27 05:20:05,136 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-27 05:20:05,481 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-27 05:20:06,541 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:06,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:06,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:06,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:06,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:06,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:06,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:20:06,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:06,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:06,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:06,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:06,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:06,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79807011] [2020-10-27 05:20:06,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:06,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-27 05:20:06,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739124961] [2020-10-27 05:20:06,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 05:20:06,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:06,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 05:20:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:20:06,710 INFO L87 Difference]: Start difference. First operand 610 states and 887 transitions. Second operand 28 states. [2020-10-27 05:20:07,226 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2020-10-27 05:20:08,598 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 258 DAG size of output: 246 [2020-10-27 05:20:09,904 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-27 05:20:10,182 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-27 05:20:10,641 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 75 [2020-10-27 05:20:11,162 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2020-10-27 05:20:11,834 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-27 05:20:12,637 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 121 [2020-10-27 05:20:13,550 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 123 [2020-10-27 05:20:13,761 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 05:20:13,998 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 05:20:14,311 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-27 05:20:14,572 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-27 05:20:14,786 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-27 05:20:18,625 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:20:19,049 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:20:19,517 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:20:20,103 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:20:21,170 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 182 [2020-10-27 05:20:22,643 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 183 [2020-10-27 05:20:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:32,549 INFO L93 Difference]: Finished difference Result 3323 states and 5016 transitions. [2020-10-27 05:20:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 05:20:32,550 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-10-27 05:20:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:32,562 INFO L225 Difference]: With dead ends: 3323 [2020-10-27 05:20:32,562 INFO L226 Difference]: Without dead ends: 2858 [2020-10-27 05:20:32,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 05:20:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2020-10-27 05:20:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 628. [2020-10-27 05:20:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-10-27 05:20:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 909 transitions. [2020-10-27 05:20:32,747 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 909 transitions. Word has length 91 [2020-10-27 05:20:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:32,747 INFO L481 AbstractCegarLoop]: Abstraction has 628 states and 909 transitions. [2020-10-27 05:20:32,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 05:20:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 909 transitions. [2020-10-27 05:20:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:20:32,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:32,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:20:32,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:20:32,749 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:32,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1909981645, now seen corresponding path program 1 times [2020-10-27 05:20:32,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:32,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098209959] [2020-10-27 05:20:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:33,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:34,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:34,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:35,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:37,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:37,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:20:37,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:20:37,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:20:37,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:37,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 05:20:37,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:20:37,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:20:37,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:38,849 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-27 05:20:39,049 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-27 05:20:39,358 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-27 05:20:39,540 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-27 05:20:39,878 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-27 05:20:40,124 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-27 05:20:40,433 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 05:20:40,642 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-27 05:20:41,249 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2020-10-27 05:20:42,348 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:20:42,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:42,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:42,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:42,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:42,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:20:42,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:20:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:20:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:20:42,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098209959] [2020-10-27 05:20:42,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:42,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-27 05:20:42,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499632996] [2020-10-27 05:20:42,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 05:20:42,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 05:20:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:20:42,446 INFO L87 Difference]: Start difference. First operand 628 states and 909 transitions. Second operand 28 states. [2020-10-27 05:20:43,170 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2020-10-27 05:20:44,814 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 275 DAG size of output: 272 [2020-10-27 05:20:45,672 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 05:20:45,965 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 05:20:46,472 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-27 05:20:47,090 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2020-10-27 05:20:47,812 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 103 [2020-10-27 05:20:48,655 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 132 [2020-10-27 05:20:49,805 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 182 DAG size of output: 162 [2020-10-27 05:20:51,102 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 200 DAG size of output: 180 [2020-10-27 05:20:53,012 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 246 DAG size of output: 226 [2020-10-27 05:20:53,335 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-27 05:20:53,669 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-27 05:20:53,905 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 05:20:54,215 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-27 05:20:54,597 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-27 05:20:54,897 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-27 05:20:59,093 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:20:59,572 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:21:00,064 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:21:00,579 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:21:01,122 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:21:01,874 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:21:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:13,393 INFO L93 Difference]: Finished difference Result 3680 states and 5559 transitions. [2020-10-27 05:21:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 05:21:13,395 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2020-10-27 05:21:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:13,411 INFO L225 Difference]: With dead ends: 3680 [2020-10-27 05:21:13,411 INFO L226 Difference]: Without dead ends: 3215 [2020-10-27 05:21:13,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=450, Invalid=2856, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 05:21:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2020-10-27 05:21:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 638. [2020-10-27 05:21:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-10-27 05:21:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 921 transitions. [2020-10-27 05:21:13,646 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 921 transitions. Word has length 92 [2020-10-27 05:21:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:13,647 INFO L481 AbstractCegarLoop]: Abstraction has 638 states and 921 transitions. [2020-10-27 05:21:13,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 05:21:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 921 transitions. [2020-10-27 05:21:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:21:13,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:13,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:13,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:21:13,649 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2043995151, now seen corresponding path program 1 times [2020-10-27 05:21:13,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:13,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236754106] [2020-10-27 05:21:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:13,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:13,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:13,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:14,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:14,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:21:14,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:21:14,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-27 05:21:14,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:14,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:21:14,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:21:14,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:21:14,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:14,795 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:14,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:14,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:14,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:14,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:14,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:14,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:21:14,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:14,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:14,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:14,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:14,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:14,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236754106] [2020-10-27 05:21:14,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:14,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:21:14,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767344030] [2020-10-27 05:21:14,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:21:14,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:14,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:21:14,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:21:14,839 INFO L87 Difference]: Start difference. First operand 638 states and 921 transitions. Second operand 8 states. [2020-10-27 05:21:15,269 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:21:16,386 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:21:16,737 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:21:17,113 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:21:17,499 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:21:18,019 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:21:18,401 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:21:18,752 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:21:19,142 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:21:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:21,443 INFO L93 Difference]: Finished difference Result 5330 states and 8101 transitions. [2020-10-27 05:21:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:21:21,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 92 [2020-10-27 05:21:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:21,468 INFO L225 Difference]: With dead ends: 5330 [2020-10-27 05:21:21,468 INFO L226 Difference]: Without dead ends: 4867 [2020-10-27 05:21:21,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:21:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2020-10-27 05:21:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 1132. [2020-10-27 05:21:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2020-10-27 05:21:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1657 transitions. [2020-10-27 05:21:21,840 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1657 transitions. Word has length 92 [2020-10-27 05:21:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:21,841 INFO L481 AbstractCegarLoop]: Abstraction has 1132 states and 1657 transitions. [2020-10-27 05:21:21,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:21:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1657 transitions. [2020-10-27 05:21:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:21:21,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:21,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:21,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:21:21,843 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:21,843 INFO L82 PathProgramCache]: Analyzing trace with hash 825910453, now seen corresponding path program 1 times [2020-10-27 05:21:21,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:21,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792924426] [2020-10-27 05:21:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:21,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:21,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:22,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:22,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:24,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:25,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:26,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:26,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:21:26,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:21:26,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:21:26,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:26,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:21:26,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:21:26,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:21:26,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:27,131 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 18 [2020-10-27 05:21:27,497 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:27,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:27,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:27,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:27,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:27,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:27,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:21:27,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:27,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:27,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:27,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792924426] [2020-10-27 05:21:27,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:27,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:21:27,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509751093] [2020-10-27 05:21:27,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:21:27,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:27,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:21:27,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:21:27,558 INFO L87 Difference]: Start difference. First operand 1132 states and 1657 transitions. Second operand 10 states. [2020-10-27 05:21:27,959 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:21:29,569 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:21:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:30,416 INFO L93 Difference]: Finished difference Result 2570 states and 3827 transitions. [2020-10-27 05:21:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:21:30,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-10-27 05:21:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:30,426 INFO L225 Difference]: With dead ends: 2570 [2020-10-27 05:21:30,426 INFO L226 Difference]: Without dead ends: 1594 [2020-10-27 05:21:30,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:21:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-10-27 05:21:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1127. [2020-10-27 05:21:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2020-10-27 05:21:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1645 transitions. [2020-10-27 05:21:30,762 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1645 transitions. Word has length 92 [2020-10-27 05:21:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:30,762 INFO L481 AbstractCegarLoop]: Abstraction has 1127 states and 1645 transitions. [2020-10-27 05:21:30,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:21:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1645 transitions. [2020-10-27 05:21:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:21:30,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:30,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:30,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:21:30,764 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:30,765 INFO L82 PathProgramCache]: Analyzing trace with hash -79416012, now seen corresponding path program 1 times [2020-10-27 05:21:30,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:30,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614860676] [2020-10-27 05:21:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:30,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:30,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:31,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:31,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:33,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:35,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:21:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:36,201 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 18 [2020-10-27 05:21:36,594 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:36,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:36,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:36,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:36,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:36,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:36,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:21:36,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:36,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:36,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:36,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:36,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:36,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614860676] [2020-10-27 05:21:36,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:36,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:21:36,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820351181] [2020-10-27 05:21:36,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:21:36,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:21:36,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:21:36,682 INFO L87 Difference]: Start difference. First operand 1127 states and 1645 transitions. Second operand 10 states. [2020-10-27 05:21:37,668 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 185 [2020-10-27 05:21:38,186 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-27 05:21:38,397 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-27 05:21:38,699 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-27 05:21:39,860 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 183 [2020-10-27 05:21:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:40,749 INFO L93 Difference]: Finished difference Result 2541 states and 3784 transitions. [2020-10-27 05:21:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:21:40,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-10-27 05:21:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:40,756 INFO L225 Difference]: With dead ends: 2541 [2020-10-27 05:21:40,756 INFO L226 Difference]: Without dead ends: 1584 [2020-10-27 05:21:40,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:21:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2020-10-27 05:21:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1117. [2020-10-27 05:21:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1117 states. [2020-10-27 05:21:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1630 transitions. [2020-10-27 05:21:41,098 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1630 transitions. Word has length 92 [2020-10-27 05:21:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:41,099 INFO L481 AbstractCegarLoop]: Abstraction has 1117 states and 1630 transitions. [2020-10-27 05:21:41,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:21:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1630 transitions. [2020-10-27 05:21:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 05:21:41,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:41,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:41,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:21:41,100 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:41,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1791131897, now seen corresponding path program 1 times [2020-10-27 05:21:41,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:41,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119844539] [2020-10-27 05:21:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:41,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:41,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:41,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:42,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:44,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:44,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 05:21:44,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:21:44,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3644 [2020-10-27 05:21:44,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:44,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:21:44,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:21:44,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:21:44,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:45,055 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 12 [2020-10-27 05:21:45,466 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:45,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:45,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:45,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:45,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:45,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:21:45,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:45,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:45,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:45,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:45,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:45,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119844539] [2020-10-27 05:21:45,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:45,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:21:45,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223943153] [2020-10-27 05:21:45,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:21:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:21:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:21:45,535 INFO L87 Difference]: Start difference. First operand 1117 states and 1630 transitions. Second operand 9 states. [2020-10-27 05:21:45,930 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:21:47,046 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:21:47,403 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:21:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:48,565 INFO L93 Difference]: Finished difference Result 2507 states and 3738 transitions. [2020-10-27 05:21:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:21:48,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-10-27 05:21:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:48,571 INFO L225 Difference]: With dead ends: 2507 [2020-10-27 05:21:48,571 INFO L226 Difference]: Without dead ends: 1535 [2020-10-27 05:21:48,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:21:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2020-10-27 05:21:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1068. [2020-10-27 05:21:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-10-27 05:21:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1567 transitions. [2020-10-27 05:21:48,937 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1567 transitions. Word has length 93 [2020-10-27 05:21:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:48,938 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1567 transitions. [2020-10-27 05:21:48,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:21:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1567 transitions. [2020-10-27 05:21:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 05:21:48,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:48,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:48,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:21:48,939 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2051524414, now seen corresponding path program 1 times [2020-10-27 05:21:48,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:48,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909947583] [2020-10-27 05:21:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:48,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:49,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:49,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:49,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:53,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:53,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 05:21:53,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:21:53,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:21:53,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:21:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:21:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:21:53,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:54,176 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2020-10-27 05:21:54,522 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:54,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:54,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:54,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:54,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:54,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:21:54,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:54,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:21:54,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:54,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:21:54,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:21:54,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909947583] [2020-10-27 05:21:54,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:54,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:21:54,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445377973] [2020-10-27 05:21:54,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:21:54,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:21:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:21:54,560 INFO L87 Difference]: Start difference. First operand 1068 states and 1567 transitions. Second operand 10 states. [2020-10-27 05:21:54,937 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:21:56,609 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:21:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:58,115 INFO L93 Difference]: Finished difference Result 2942 states and 4407 transitions. [2020-10-27 05:21:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:21:58,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-27 05:21:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:58,120 INFO L225 Difference]: With dead ends: 2942 [2020-10-27 05:21:58,120 INFO L226 Difference]: Without dead ends: 2000 [2020-10-27 05:21:58,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:21:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2020-10-27 05:21:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1050. [2020-10-27 05:21:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1050 states. [2020-10-27 05:21:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1542 transitions. [2020-10-27 05:21:58,487 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1542 transitions. Word has length 93 [2020-10-27 05:21:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:58,488 INFO L481 AbstractCegarLoop]: Abstraction has 1050 states and 1542 transitions. [2020-10-27 05:21:58,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:21:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1542 transitions. [2020-10-27 05:21:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 05:21:58,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:58,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:58,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:21:58,489 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:58,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:58,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1048225727, now seen corresponding path program 1 times [2020-10-27 05:21:58,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:58,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311666057] [2020-10-27 05:21:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:58,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:58,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:58,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:59,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:03,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:03,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 05:22:03,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:22:03,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:22:03,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:03,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:22:03,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:22:03,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 05:22:03,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:03,750 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2020-10-27 05:22:04,125 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:04,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:04,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:04,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:04,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:04,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:22:04,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:22:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:04,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:22:04,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:22:04,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311666057] [2020-10-27 05:22:04,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:04,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:22:04,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886626671] [2020-10-27 05:22:04,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:22:04,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:04,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:22:04,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:22:04,174 INFO L87 Difference]: Start difference. First operand 1050 states and 1542 transitions. Second operand 10 states.