/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:11:38,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:11:38,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:11:38,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:11:38,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:11:38,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:11:38,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:11:38,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:11:38,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:11:38,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:11:38,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:11:38,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:11:38,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:11:38,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:11:38,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:11:38,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:11:38,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:11:38,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:11:38,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:11:38,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:11:38,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:11:38,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:11:38,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:11:38,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:11:38,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:11:38,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:11:38,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:11:38,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:11:38,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:11:38,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:11:38,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:11:38,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:11:38,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:11:38,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:11:38,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:11:38,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:11:38,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:11:38,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:11:38,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:11:38,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:11:38,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:11:38,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:11:38,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:11:38,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:11:38,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:11:38,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:11:38,783 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:11:38,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:11:38,783 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:11:38,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:11:38,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:11:38,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:11:38,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:11:38,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:11:38,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:11:38,785 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:11:38,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:11:38,786 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:11:38,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:11:38,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:11:38,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:11:38,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:11:38,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:11:38,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:11:38,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:11:38,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:11:38,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:11:38,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:11:38,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:11:38,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:11:38,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:11:38,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:11:39,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:11:39,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:11:39,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:11:39,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:11:39,226 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:11:39,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 00:11:39,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f4915267/7238215377e148ce83dbacb4bd84e72f/FLAG1f817815d [2020-10-28 00:11:39,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:11:39,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 00:11:39,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f4915267/7238215377e148ce83dbacb4bd84e72f/FLAG1f817815d [2020-10-28 00:11:40,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f4915267/7238215377e148ce83dbacb4bd84e72f [2020-10-28 00:11:40,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:11:40,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:11:40,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:11:40,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:11:40,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:11:40,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:40,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f9fdef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40, skipping insertion in model container [2020-10-28 00:11:40,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:40,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:11:40,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:11:40,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:11:40,798 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:11:40,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:11:40,901 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:11:40,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40 WrapperNode [2020-10-28 00:11:40,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:11:40,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:11:40,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:11:40,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:11:40,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:40,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:40,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:40,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:40,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:40,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:40,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (1/1) ... [2020-10-28 00:11:41,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:11:41,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:11:41,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:11:41,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:11:41,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:11:41,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:11:41,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:11:41,099 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:11:41,099 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:11:41,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:11:41,100 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:11:41,100 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:11:41,100 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:11:41,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:11:41,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:11:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:11:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:11:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:11:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:11:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:11:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:11:41,101 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:11:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:11:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:11:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:11:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:11:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:11:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:11:41,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:11:41,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:11:41,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:11:41,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:11:41,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:11:42,090 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:11:42,091 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:11:42,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:11:42 BoogieIcfgContainer [2020-10-28 00:11:42,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:11:42,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:11:42,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:11:42,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:11:42,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:11:40" (1/3) ... [2020-10-28 00:11:42,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff0e221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:11:42, skipping insertion in model container [2020-10-28 00:11:42,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:40" (2/3) ... [2020-10-28 00:11:42,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff0e221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:11:42, skipping insertion in model container [2020-10-28 00:11:42,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:11:42" (3/3) ... [2020-10-28 00:11:42,102 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 00:11:42,113 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:11:42,118 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:11:42,131 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:11:42,160 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:11:42,160 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:11:42,160 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:11:42,160 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:11:42,160 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:11:42,161 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:11:42,161 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:11:42,161 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:11:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-10-28 00:11:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:11:42,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:42,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:42,194 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1986643699, now seen corresponding path program 1 times [2020-10-28 00:11:42,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:42,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532859508] [2020-10-28 00:11:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:42,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:43,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:45,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:45,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:11:45,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:11:45,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3334 [2020-10-28 00:11:45,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:45,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:11:45,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:11:45,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:11:46,236 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:11:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:46,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:46,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:46,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:46,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:11:46,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:46,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532859508] [2020-10-28 00:11:46,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:46,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:46,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818531431] [2020-10-28 00:11:46,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:46,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:46,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:46,328 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 4 states. [2020-10-28 00:11:46,619 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 00:11:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:47,450 INFO L93 Difference]: Finished difference Result 359 states and 584 transitions. [2020-10-28 00:11:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:47,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:11:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:47,468 INFO L225 Difference]: With dead ends: 359 [2020-10-28 00:11:47,468 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 00:11:47,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 00:11:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2020-10-28 00:11:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-28 00:11:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 392 transitions. [2020-10-28 00:11:47,548 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 392 transitions. Word has length 69 [2020-10-28 00:11:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:47,549 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 392 transitions. [2020-10-28 00:11:47,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 392 transitions. [2020-10-28 00:11:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:11:47,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:47,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:47,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:11:47,553 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:47,554 INFO L82 PathProgramCache]: Analyzing trace with hash -913594550, now seen corresponding path program 1 times [2020-10-28 00:11:47,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:47,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745690871] [2020-10-28 00:11:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:47,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:47,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:48,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:48,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:11:48,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:48,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-28 00:11:48,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:48,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:11:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 00:11:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:11:48,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:48,762 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:11:48,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:48,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:48,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:48,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:48,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:48,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 00:11:48,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:48,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:48,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:48,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:48,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:48,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745690871] [2020-10-28 00:11:48,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:48,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:11:48,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291582573] [2020-10-28 00:11:48,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:11:48,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:48,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:11:48,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:48,838 INFO L87 Difference]: Start difference. First operand 264 states and 392 transitions. Second operand 5 states. [2020-10-28 00:11:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:49,574 INFO L93 Difference]: Finished difference Result 402 states and 607 transitions. [2020-10-28 00:11:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:11:49,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 00:11:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:49,579 INFO L225 Difference]: With dead ends: 402 [2020-10-28 00:11:49,579 INFO L226 Difference]: Without dead ends: 399 [2020-10-28 00:11:49,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:11:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-28 00:11:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 266. [2020-10-28 00:11:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-28 00:11:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 394 transitions. [2020-10-28 00:11:49,609 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 394 transitions. Word has length 70 [2020-10-28 00:11:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:49,610 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 394 transitions. [2020-10-28 00:11:49,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:11:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 394 transitions. [2020-10-28 00:11:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:11:49,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:49,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:11:49,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:11:49,614 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:49,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1164471961, now seen corresponding path program 1 times [2020-10-28 00:11:49,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:49,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523436144] [2020-10-28 00:11:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:49,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:49,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:50,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:50,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:11:50,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:50,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-28 00:11:50,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:50,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:11:50,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:11:50,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:11:50,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:51,011 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:11:51,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:51,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:51,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:51,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:51,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:11:51,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:51,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:51,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523436144] [2020-10-28 00:11:51,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:51,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:11:51,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58308829] [2020-10-28 00:11:51,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:11:51,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:51,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:11:51,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:11:51,078 INFO L87 Difference]: Start difference. First operand 266 states and 394 transitions. Second operand 7 states. [2020-10-28 00:11:52,224 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 00:11:52,500 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 00:11:52,786 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 00:11:53,117 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 00:11:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:54,153 INFO L93 Difference]: Finished difference Result 978 states and 1490 transitions. [2020-10-28 00:11:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:11:54,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-28 00:11:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:54,160 INFO L225 Difference]: With dead ends: 978 [2020-10-28 00:11:54,161 INFO L226 Difference]: Without dead ends: 775 [2020-10-28 00:11:54,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:11:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-28 00:11:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 766. [2020-10-28 00:11:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-28 00:11:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1158 transitions. [2020-10-28 00:11:54,251 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1158 transitions. Word has length 71 [2020-10-28 00:11:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:54,254 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 1158 transitions. [2020-10-28 00:11:54,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:11:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1158 transitions. [2020-10-28 00:11:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:11:54,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:54,268 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] [2020-10-28 00:11:54,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:11:54,268 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:54,269 INFO L82 PathProgramCache]: Analyzing trace with hash 24070599, now seen corresponding path program 1 times [2020-10-28 00:11:54,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:54,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428022162] [2020-10-28 00:11:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:54,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:54,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:11:54,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:11:54,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-28 00:11:54,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:11:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:11:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 00:11:54,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:11:55,354 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:11:55,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:55,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:55,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:55,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:55,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:55,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:11:55,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:55,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:55,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:55,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:55,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:55,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428022162] [2020-10-28 00:11:55,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:55,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:11:55,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348265447] [2020-10-28 00:11:55,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:11:55,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:11:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:55,470 INFO L87 Difference]: Start difference. First operand 766 states and 1158 transitions. Second operand 5 states. [2020-10-28 00:11:55,737 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 00:11:56,394 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:11:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:56,838 INFO L93 Difference]: Finished difference Result 1700 states and 2606 transitions. [2020-10-28 00:11:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:11:56,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 00:11:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:56,847 INFO L225 Difference]: With dead ends: 1700 [2020-10-28 00:11:56,848 INFO L226 Difference]: Without dead ends: 1207 [2020-10-28 00:11:56,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:11:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2020-10-28 00:11:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1204. [2020-10-28 00:11:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2020-10-28 00:11:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1830 transitions. [2020-10-28 00:11:56,947 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1830 transitions. Word has length 72 [2020-10-28 00:11:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:56,947 INFO L481 AbstractCegarLoop]: Abstraction has 1204 states and 1830 transitions. [2020-10-28 00:11:56,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:11:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1830 transitions. [2020-10-28 00:11:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:11:56,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:56,949 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] [2020-10-28 00:11:56,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:11:56,950 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 914478242, now seen corresponding path program 1 times [2020-10-28 00:11:56,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:56,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40910098] [2020-10-28 00:11:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:56,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:57,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:57,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:02,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:02,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:12:02,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:12:02,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 00:12:02,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:12:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:12:02,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:02,298 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:02,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:02,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:02,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:02,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:02,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:02,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:12:02,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:02,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:02,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40910098] [2020-10-28 00:12:02,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:02,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:02,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587106996] [2020-10-28 00:12:02,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:02,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:02,354 INFO L87 Difference]: Start difference. First operand 1204 states and 1830 transitions. Second operand 4 states. [2020-10-28 00:12:02,613 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 00:12:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:03,401 INFO L93 Difference]: Finished difference Result 2830 states and 4340 transitions. [2020-10-28 00:12:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:03,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:12:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:03,415 INFO L225 Difference]: With dead ends: 2830 [2020-10-28 00:12:03,415 INFO L226 Difference]: Without dead ends: 2002 [2020-10-28 00:12:03,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2020-10-28 00:12:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1999. [2020-10-28 00:12:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1999 states. [2020-10-28 00:12:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3029 transitions. [2020-10-28 00:12:03,566 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3029 transitions. Word has length 73 [2020-10-28 00:12:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:03,568 INFO L481 AbstractCegarLoop]: Abstraction has 1999 states and 3029 transitions. [2020-10-28 00:12:03,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:03,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3029 transitions. [2020-10-28 00:12:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:12:03,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:03,572 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] [2020-10-28 00:12:03,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:12:03,573 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1000259108, now seen corresponding path program 1 times [2020-10-28 00:12:03,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:03,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918984219] [2020-10-28 00:12:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:03,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:04,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:04,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:05,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:08,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:08,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:12:08,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:12:08,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:12:08,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:08,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:12:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:12:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:12:08,871 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:08,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:08,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:08,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:08,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:08,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:08,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:12:08,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:08,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:08,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:08,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918984219] [2020-10-28 00:12:08,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:08,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:08,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064298044] [2020-10-28 00:12:08,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:08,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:08,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:08,916 INFO L87 Difference]: Start difference. First operand 1999 states and 3029 transitions. Second operand 4 states. [2020-10-28 00:12:09,164 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 00:12:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:09,943 INFO L93 Difference]: Finished difference Result 2993 states and 4537 transitions. [2020-10-28 00:12:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:09,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:12:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:09,956 INFO L225 Difference]: With dead ends: 2993 [2020-10-28 00:12:09,956 INFO L226 Difference]: Without dead ends: 2452 [2020-10-28 00:12:09,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2020-10-28 00:12:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2449. [2020-10-28 00:12:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2449 states. [2020-10-28 00:12:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3649 transitions. [2020-10-28 00:12:10,120 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3649 transitions. Word has length 73 [2020-10-28 00:12:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:10,121 INFO L481 AbstractCegarLoop]: Abstraction has 2449 states and 3649 transitions. [2020-10-28 00:12:10,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3649 transitions. [2020-10-28 00:12:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:12:10,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:10,123 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] [2020-10-28 00:12:10,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:12:10,124 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:10,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1890937058, now seen corresponding path program 1 times [2020-10-28 00:12:10,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:10,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448369167] [2020-10-28 00:12:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:10,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:10,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:10,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:10,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:10,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:11,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:15,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:15,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:12:15,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:12:15,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:12:15,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 00:12:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:12:15,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:12:15,457 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:15,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:15,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:15,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:15,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:15,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:12:15,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:15,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:15,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:12:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:15,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448369167] [2020-10-28 00:12:15,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:15,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:15,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690771867] [2020-10-28 00:12:15,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:15,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:15,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:15,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:15,516 INFO L87 Difference]: Start difference. First operand 2449 states and 3649 transitions. Second operand 4 states. [2020-10-28 00:12:15,812 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 00:12:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:16,622 INFO L93 Difference]: Finished difference Result 4802 states and 7188 transitions. [2020-10-28 00:12:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:16,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:12:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:16,640 INFO L225 Difference]: With dead ends: 4802 [2020-10-28 00:12:16,641 INFO L226 Difference]: Without dead ends: 3337 [2020-10-28 00:12:16,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2020-10-28 00:12:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 3318. [2020-10-28 00:12:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3318 states. [2020-10-28 00:12:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 4865 transitions. [2020-10-28 00:12:16,849 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 4865 transitions. Word has length 73 [2020-10-28 00:12:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:16,850 INFO L481 AbstractCegarLoop]: Abstraction has 3318 states and 4865 transitions. [2020-10-28 00:12:16,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 4865 transitions. [2020-10-28 00:12:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:12:16,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:16,853 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] [2020-10-28 00:12:16,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:12:16,853 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2130654620, now seen corresponding path program 1 times [2020-10-28 00:12:16,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:16,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814214231] [2020-10-28 00:12:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:16,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:17,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:20,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:20,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:12:20,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:20,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3984 [2020-10-28 00:12:20,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:12:20,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:21,125 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:21,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:21,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:21,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:21,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:21,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:21,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:12:21,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:21,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:21,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:21,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:21,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:21,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814214231] [2020-10-28 00:12:21,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:21,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:12:21,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257059054] [2020-10-28 00:12:21,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:21,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:21,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:21,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:21,171 INFO L87 Difference]: Start difference. First operand 3318 states and 4865 transitions. Second operand 6 states. [2020-10-28 00:12:21,981 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:12:22,959 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:12:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:23,383 INFO L93 Difference]: Finished difference Result 15967 states and 23458 transitions. [2020-10-28 00:12:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:23,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-28 00:12:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:23,447 INFO L225 Difference]: With dead ends: 15967 [2020-10-28 00:12:23,447 INFO L226 Difference]: Without dead ends: 13072 [2020-10-28 00:12:23,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13072 states. [2020-10-28 00:12:23,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13072 to 3330. [2020-10-28 00:12:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3330 states. [2020-10-28 00:12:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4849 transitions. [2020-10-28 00:12:23,799 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4849 transitions. Word has length 73 [2020-10-28 00:12:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:23,800 INFO L481 AbstractCegarLoop]: Abstraction has 3330 states and 4849 transitions. [2020-10-28 00:12:23,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4849 transitions. [2020-10-28 00:12:23,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:12:23,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:23,803 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] [2020-10-28 00:12:23,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:12:23,803 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash -861211983, now seen corresponding path program 1 times [2020-10-28 00:12:23,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:23,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313933213] [2020-10-28 00:12:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:23,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:23,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:23,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:26,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:26,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:12:26,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:26,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2818 [2020-10-28 00:12:26,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:26,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:26,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:12:26,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:12:26,906 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:26,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:26,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:26,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:26,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:26,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:26,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:12:26,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:26,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:26,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:26,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:26,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:26,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313933213] [2020-10-28 00:12:26,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:26,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:12:26,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925998462] [2020-10-28 00:12:26,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:26,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:26,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:26,943 INFO L87 Difference]: Start difference. First operand 3330 states and 4849 transitions. Second operand 6 states. [2020-10-28 00:12:27,761 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:12:28,959 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:12:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:29,342 INFO L93 Difference]: Finished difference Result 18991 states and 27503 transitions. [2020-10-28 00:12:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:29,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-28 00:12:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:29,404 INFO L225 Difference]: With dead ends: 18991 [2020-10-28 00:12:29,404 INFO L226 Difference]: Without dead ends: 16056 [2020-10-28 00:12:29,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16056 states. [2020-10-28 00:12:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16056 to 3588. [2020-10-28 00:12:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3588 states. [2020-10-28 00:12:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 5103 transitions. [2020-10-28 00:12:29,800 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 5103 transitions. Word has length 73 [2020-10-28 00:12:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:29,801 INFO L481 AbstractCegarLoop]: Abstraction has 3588 states and 5103 transitions. [2020-10-28 00:12:29,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 5103 transitions. [2020-10-28 00:12:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:12:29,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:29,804 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] [2020-10-28 00:12:29,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:12:29,804 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:29,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:29,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2034260542, now seen corresponding path program 1 times [2020-10-28 00:12:29,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:29,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488539443] [2020-10-28 00:12:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:29,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:29,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:29,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:30,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:30,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:32,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:32,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:12:32,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:32,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2405 [2020-10-28 00:12:32,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:32,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:32,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:32,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:12:32,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:32,482 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:32,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:32,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:32,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:32,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:32,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:32,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:12:32,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:32,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:32,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488539443] [2020-10-28 00:12:32,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:32,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:12:32,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014460100] [2020-10-28 00:12:32,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:32,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:32,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:32,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:32,511 INFO L87 Difference]: Start difference. First operand 3588 states and 5103 transitions. Second operand 6 states. [2020-10-28 00:12:33,339 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:12:34,394 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:12:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:34,884 INFO L93 Difference]: Finished difference Result 16369 states and 23219 transitions. [2020-10-28 00:12:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:34,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-28 00:12:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:34,916 INFO L225 Difference]: With dead ends: 16369 [2020-10-28 00:12:34,916 INFO L226 Difference]: Without dead ends: 13557 [2020-10-28 00:12:34,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13557 states. [2020-10-28 00:12:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13557 to 3918. [2020-10-28 00:12:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-10-28 00:12:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5493 transitions. [2020-10-28 00:12:35,329 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5493 transitions. Word has length 73 [2020-10-28 00:12:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:35,330 INFO L481 AbstractCegarLoop]: Abstraction has 3918 states and 5493 transitions. [2020-10-28 00:12:35,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5493 transitions. [2020-10-28 00:12:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 00:12:35,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:35,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:35,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:12:35,334 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:35,335 INFO L82 PathProgramCache]: Analyzing trace with hash -880356020, now seen corresponding path program 1 times [2020-10-28 00:12:35,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:35,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773526017] [2020-10-28 00:12:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:35,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:35,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:35,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:35,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:38,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:38,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 00:12:38,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:12:38,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2871 [2020-10-28 00:12:38,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:38,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:12:38,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:38,501 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:38,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:38,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:38,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:38,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:38,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:12:38,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:38,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773526017] [2020-10-28 00:12:38,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:38,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:12:38,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639935730] [2020-10-28 00:12:38,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:38,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:38,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:38,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:38,536 INFO L87 Difference]: Start difference. First operand 3918 states and 5493 transitions. Second operand 6 states. [2020-10-28 00:12:39,370 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:12:40,363 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:12:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:40,803 INFO L93 Difference]: Finished difference Result 15571 states and 21749 transitions. [2020-10-28 00:12:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:40,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-28 00:12:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:40,837 INFO L225 Difference]: With dead ends: 15571 [2020-10-28 00:12:40,837 INFO L226 Difference]: Without dead ends: 12374 [2020-10-28 00:12:40,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:40,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12374 states. [2020-10-28 00:12:41,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12374 to 4002. [2020-10-28 00:12:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4002 states. [2020-10-28 00:12:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5533 transitions. [2020-10-28 00:12:41,325 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5533 transitions. Word has length 74 [2020-10-28 00:12:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:41,326 INFO L481 AbstractCegarLoop]: Abstraction has 4002 states and 5533 transitions. [2020-10-28 00:12:41,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5533 transitions. [2020-10-28 00:12:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 00:12:41,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:41,330 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] [2020-10-28 00:12:41,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:12:41,330 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:41,331 INFO L82 PathProgramCache]: Analyzing trace with hash 369478414, now seen corresponding path program 1 times [2020-10-28 00:12:41,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:41,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832084658] [2020-10-28 00:12:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:41,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:41,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:41,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:41,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:41,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:42,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:42,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:44,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:46,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:46,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 00:12:46,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:12:46,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:12:46,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:46,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:46,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:12:46,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:12:46,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:46,592 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:46,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:46,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:46,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:46,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:46,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:46,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:12:46,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:46,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:46,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:46,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:46,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:46,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832084658] [2020-10-28 00:12:46,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:46,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:46,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733358475] [2020-10-28 00:12:46,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:46,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:46,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:46,625 INFO L87 Difference]: Start difference. First operand 4002 states and 5533 transitions. Second operand 4 states. [2020-10-28 00:12:46,879 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 00:12:48,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:48,152 INFO L93 Difference]: Finished difference Result 8792 states and 12226 transitions. [2020-10-28 00:12:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:48,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 00:12:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:48,163 INFO L225 Difference]: With dead ends: 8792 [2020-10-28 00:12:48,163 INFO L226 Difference]: Without dead ends: 5833 [2020-10-28 00:12:48,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2020-10-28 00:12:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 5822. [2020-10-28 00:12:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5822 states. [2020-10-28 00:12:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5822 states to 5822 states and 7918 transitions. [2020-10-28 00:12:48,649 INFO L78 Accepts]: Start accepts. Automaton has 5822 states and 7918 transitions. Word has length 74 [2020-10-28 00:12:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:48,649 INFO L481 AbstractCegarLoop]: Abstraction has 5822 states and 7918 transitions. [2020-10-28 00:12:48,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5822 states and 7918 transitions. [2020-10-28 00:12:48,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 00:12:48,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:48,654 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] [2020-10-28 00:12:48,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:12:48,654 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1570260385, now seen corresponding path program 1 times [2020-10-28 00:12:48,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:48,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213841980] [2020-10-28 00:12:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:48,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:48,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:48,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:48,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:50,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:53,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 00:12:53,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:12:53,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:12:53,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:53,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:12:53,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:53,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:12:53,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:12:54,179 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:54,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:54,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:54,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:54,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:54,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:12:54,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:54,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:54,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:54,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:54,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:54,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213841980] [2020-10-28 00:12:54,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:54,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:12:54,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208961262] [2020-10-28 00:12:54,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:12:54,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:12:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:12:54,222 INFO L87 Difference]: Start difference. First operand 5822 states and 7918 transitions. Second operand 11 states. [2020-10-28 00:12:54,532 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 00:12:56,475 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 00:13:00,416 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:13:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:02,297 INFO L93 Difference]: Finished difference Result 50140 states and 68079 transitions. [2020-10-28 00:13:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:13:02,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-28 00:13:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:02,356 INFO L225 Difference]: With dead ends: 50140 [2020-10-28 00:13:02,356 INFO L226 Difference]: Without dead ends: 46147 [2020-10-28 00:13:02,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:13:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46147 states. [2020-10-28 00:13:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46147 to 6283. [2020-10-28 00:13:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6283 states. [2020-10-28 00:13:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 8531 transitions. [2020-10-28 00:13:03,679 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 8531 transitions. Word has length 74 [2020-10-28 00:13:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:03,679 INFO L481 AbstractCegarLoop]: Abstraction has 6283 states and 8531 transitions. [2020-10-28 00:13:03,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:13:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 8531 transitions. [2020-10-28 00:13:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 00:13:03,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:03,685 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] [2020-10-28 00:13:03,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:13:03,686 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:03,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2134384001, now seen corresponding path program 1 times [2020-10-28 00:13:03,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:03,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450964907] [2020-10-28 00:13:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:03,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:05,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:05,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:05,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:08,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:08,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 00:13:08,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:13:08,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:13:08,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:13:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:13:08,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:09,004 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-28 00:13:09,342 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:13:09,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:09,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:09,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:09,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:09,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:13:09,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:09,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:09,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:09,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:09,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:09,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450964907] [2020-10-28 00:13:09,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:09,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:13:09,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129446743] [2020-10-28 00:13:09,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:13:09,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:09,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:13:09,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:13:09,371 INFO L87 Difference]: Start difference. First operand 6283 states and 8531 transitions. Second operand 11 states. [2020-10-28 00:13:09,701 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 00:13:12,358 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:13:16,023 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:13:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:18,753 INFO L93 Difference]: Finished difference Result 41923 states and 56929 transitions. [2020-10-28 00:13:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:13:18,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-28 00:13:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:18,934 INFO L225 Difference]: With dead ends: 41923 [2020-10-28 00:13:18,934 INFO L226 Difference]: Without dead ends: 38593 [2020-10-28 00:13:18,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:13:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38593 states. [2020-10-28 00:13:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38593 to 6685. [2020-10-28 00:13:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6685 states. [2020-10-28 00:13:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6685 states to 6685 states and 9041 transitions. [2020-10-28 00:13:20,135 INFO L78 Accepts]: Start accepts. Automaton has 6685 states and 9041 transitions. Word has length 74 [2020-10-28 00:13:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:20,135 INFO L481 AbstractCegarLoop]: Abstraction has 6685 states and 9041 transitions. [2020-10-28 00:13:20,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:13:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand 6685 states and 9041 transitions. [2020-10-28 00:13:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:13:20,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:20,141 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] [2020-10-28 00:13:20,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:13:20,141 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1649977000, now seen corresponding path program 1 times [2020-10-28 00:13:20,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:20,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821059067] [2020-10-28 00:13:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:20,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:20,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:20,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:20,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:20,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:20,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:20,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:21,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:22,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:22,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:25,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:25,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:13:25,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:13:25,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:13:25,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:13:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:13:25,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:25,576 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:13:25,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:25,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:25,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:25,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:25,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:25,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:13:25,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:25,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:25,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:25,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:25,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:25,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821059067] [2020-10-28 00:13:25,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:25,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:13:25,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432593567] [2020-10-28 00:13:25,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:13:25,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:25,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:13:25,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:13:25,605 INFO L87 Difference]: Start difference. First operand 6685 states and 9041 transitions. Second operand 11 states. [2020-10-28 00:13:25,911 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 00:13:28,141 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 00:13:33,750 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:13:36,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:36,391 INFO L93 Difference]: Finished difference Result 44769 states and 60792 transitions. [2020-10-28 00:13:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:13:36,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-28 00:13:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:36,433 INFO L225 Difference]: With dead ends: 44769 [2020-10-28 00:13:36,434 INFO L226 Difference]: Without dead ends: 40185 [2020-10-28 00:13:36,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:13:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40185 states. [2020-10-28 00:13:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40185 to 7597. [2020-10-28 00:13:37,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7597 states. [2020-10-28 00:13:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7597 states to 7597 states and 10228 transitions. [2020-10-28 00:13:37,583 INFO L78 Accepts]: Start accepts. Automaton has 7597 states and 10228 transitions. Word has length 75 [2020-10-28 00:13:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:37,583 INFO L481 AbstractCegarLoop]: Abstraction has 7597 states and 10228 transitions. [2020-10-28 00:13:37,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:13:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7597 states and 10228 transitions. [2020-10-28 00:13:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:13:37,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:37,592 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] [2020-10-28 00:13:37,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:13:37,592 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1660590212, now seen corresponding path program 1 times [2020-10-28 00:13:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:37,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354694811] [2020-10-28 00:13:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:37,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:38,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:38,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:38,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:39,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:42,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:42,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:13:42,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:13:42,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:13:42,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:13:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:13:42,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:42,869 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 14 [2020-10-28 00:13:43,162 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:13:43,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:43,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:43,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:43,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:13:43,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:43,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:43,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354694811] [2020-10-28 00:13:43,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:43,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:13:43,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267448361] [2020-10-28 00:13:43,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:13:43,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:13:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:13:43,201 INFO L87 Difference]: Start difference. First operand 7597 states and 10228 transitions. Second operand 11 states. [2020-10-28 00:13:43,522 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 00:13:45,379 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 00:13:50,561 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:13:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:51,807 INFO L93 Difference]: Finished difference Result 25193 states and 33935 transitions. [2020-10-28 00:13:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 00:13:51,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-28 00:13:51,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:51,833 INFO L225 Difference]: With dead ends: 25193 [2020-10-28 00:13:51,834 INFO L226 Difference]: Without dead ends: 23238 [2020-10-28 00:13:51,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-10-28 00:13:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23238 states. [2020-10-28 00:13:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23238 to 8033. [2020-10-28 00:13:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8033 states. [2020-10-28 00:13:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8033 states to 8033 states and 10747 transitions. [2020-10-28 00:13:52,943 INFO L78 Accepts]: Start accepts. Automaton has 8033 states and 10747 transitions. Word has length 75 [2020-10-28 00:13:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:52,943 INFO L481 AbstractCegarLoop]: Abstraction has 8033 states and 10747 transitions. [2020-10-28 00:13:52,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:13:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8033 states and 10747 transitions. [2020-10-28 00:13:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:13:52,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:52,951 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] [2020-10-28 00:13:52,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:13:52,952 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:52,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2050968247, now seen corresponding path program 1 times [2020-10-28 00:13:52,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:52,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862913038] [2020-10-28 00:13:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:53,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:53,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:53,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:53,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:54,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:54,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:54,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:54,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:55,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:55,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:57,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:57,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:13:57,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:13:57,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:13:57,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:57,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:13:57,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:13:57,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:13:57,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:58,463 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:13:58,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:58,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:58,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:58,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:58,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:13:58,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:58,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:58,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:58,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:58,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:58,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862913038] [2020-10-28 00:13:58,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:58,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 00:13:58,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072708984] [2020-10-28 00:13:58,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:13:58,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:13:58,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:13:58,492 INFO L87 Difference]: Start difference. First operand 8033 states and 10747 transitions. Second operand 12 states. [2020-10-28 00:13:58,772 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:14:00,738 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 00:14:01,005 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 00:14:06,936 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 00:14:07,565 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:14:08,184 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 00:14:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:14,109 INFO L93 Difference]: Finished difference Result 57895 states and 78147 transitions. [2020-10-28 00:14:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 00:14:14,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-10-28 00:14:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:14,165 INFO L225 Difference]: With dead ends: 57895 [2020-10-28 00:14:14,166 INFO L226 Difference]: Without dead ends: 52417 [2020-10-28 00:14:14,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 00:14:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52417 states. [2020-10-28 00:14:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52417 to 11925. [2020-10-28 00:14:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11925 states. [2020-10-28 00:14:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 16181 transitions. [2020-10-28 00:14:16,781 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 16181 transitions. Word has length 75 [2020-10-28 00:14:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:16,781 INFO L481 AbstractCegarLoop]: Abstraction has 11925 states and 16181 transitions. [2020-10-28 00:14:16,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:14:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 16181 transitions. [2020-10-28 00:14:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:14:16,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:16,787 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] [2020-10-28 00:14:16,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:14:16,787 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:16,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1520554084, now seen corresponding path program 1 times [2020-10-28 00:14:16,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:16,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761428518] [2020-10-28 00:14:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:16,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:16,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:17,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:17,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:19,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:21,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:21,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:14:21,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:14:21,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:14:21,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:14:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:14:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 00:14:21,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:22,112 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:14:22,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:22,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:22,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:22,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:22,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:14:22,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:22,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:22,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761428518] [2020-10-28 00:14:22,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:22,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:14:22,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376014623] [2020-10-28 00:14:22,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:14:22,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:22,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:14:22,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:14:22,156 INFO L87 Difference]: Start difference. First operand 11925 states and 16181 transitions. Second operand 6 states. [2020-10-28 00:14:22,450 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:14:23,981 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:14:24,385 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:14:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:32,991 INFO L93 Difference]: Finished difference Result 43455 states and 60015 transitions. [2020-10-28 00:14:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:14:32,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-28 00:14:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:33,031 INFO L225 Difference]: With dead ends: 43455 [2020-10-28 00:14:33,032 INFO L226 Difference]: Without dead ends: 37212 [2020-10-28 00:14:33,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:14:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37212 states. [2020-10-28 00:14:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37212 to 18501. [2020-10-28 00:14:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18501 states. [2020-10-28 00:14:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18501 states to 18501 states and 25225 transitions. [2020-10-28 00:14:36,909 INFO L78 Accepts]: Start accepts. Automaton has 18501 states and 25225 transitions. Word has length 75 [2020-10-28 00:14:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:36,909 INFO L481 AbstractCegarLoop]: Abstraction has 18501 states and 25225 transitions. [2020-10-28 00:14:36,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:14:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 18501 states and 25225 transitions. [2020-10-28 00:14:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:14:36,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:36,916 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] [2020-10-28 00:14:36,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:14:36,916 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:36,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1528221107, now seen corresponding path program 1 times [2020-10-28 00:14:36,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:36,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533046340] [2020-10-28 00:14:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:36,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:37,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:37,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:37,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:37,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:39,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:41,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:41,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:14:41,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:14:41,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:14:41,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:41,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:14:41,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:14:41,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:14:41,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:42,219 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:14:42,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:42,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:42,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:42,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:42,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:42,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:14:42,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:42,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:42,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:42,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533046340] [2020-10-28 00:14:42,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:42,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:14:42,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017097656] [2020-10-28 00:14:42,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:14:42,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:42,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:14:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:14:42,245 INFO L87 Difference]: Start difference. First operand 18501 states and 25225 transitions. Second operand 6 states. [2020-10-28 00:14:42,514 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:14:44,177 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:14:44,750 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:15:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:00,413 INFO L93 Difference]: Finished difference Result 86999 states and 120888 transitions. [2020-10-28 00:15:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:15:00,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-28 00:15:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:00,487 INFO L225 Difference]: With dead ends: 86999 [2020-10-28 00:15:00,488 INFO L226 Difference]: Without dead ends: 70969 [2020-10-28 00:15:00,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:15:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70969 states. [2020-10-28 00:15:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70969 to 42570. [2020-10-28 00:15:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42570 states. [2020-10-28 00:15:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42570 states to 42570 states and 58831 transitions. [2020-10-28 00:15:09,772 INFO L78 Accepts]: Start accepts. Automaton has 42570 states and 58831 transitions. Word has length 75 [2020-10-28 00:15:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:09,773 INFO L481 AbstractCegarLoop]: Abstraction has 42570 states and 58831 transitions. [2020-10-28 00:15:09,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:15:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 42570 states and 58831 transitions. [2020-10-28 00:15:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 00:15:09,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:09,781 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] [2020-10-28 00:15:09,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:15:09,781 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:09,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1184418840, now seen corresponding path program 1 times [2020-10-28 00:15:09,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:09,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336225319] [2020-10-28 00:15:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:09,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:09,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:10,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:10,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:10,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:14,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:14,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 00:15:14,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:15:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:15:14,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:15:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:15:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:15:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:15,060 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:15:15,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:15,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:15,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:15,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:15,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:15,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:15:15,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:15,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:15,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:15,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:15,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:15,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336225319] [2020-10-28 00:15:15,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:15,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:15:15,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236873112] [2020-10-28 00:15:15,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:15:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:15:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:15:15,086 INFO L87 Difference]: Start difference. First operand 42570 states and 58831 transitions. Second operand 6 states. [2020-10-28 00:15:15,333 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 00:15:17,704 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159