/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.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:41:48,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:41:48,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:41:48,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:41:48,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:41:48,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:41:48,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:41:48,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:41:48,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:41:48,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:41:48,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:41:48,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:41:48,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:41:48,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:41:48,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:41:48,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:41:48,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:41:48,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:41:48,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:41:48,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:41:48,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:41:48,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:41:48,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:41:48,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:41:48,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:41:48,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:41:48,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:41:48,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:41:48,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:41:48,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:41:48,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:41:48,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:41:48,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:41:48,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:41:48,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:41:48,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:41:48,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:41:48,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:41:48,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:41:48,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:41:48,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:41:48,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:41:49,036 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:41:49,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:41:49,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:41:49,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:41:49,043 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:41:49,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:41:49,043 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:41:49,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:41:49,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:41:49,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:41:49,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:41:49,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:41:49,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:41:49,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:41:49,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:41:49,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:41:49,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:41:49,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:41:49,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:41:49,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:41:49,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:41:49,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:41:49,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:41:49,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:41:49,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:41:49,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:41:49,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:41:49,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:41:49,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:41:49,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:41:49,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:41:49,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:41:49,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:41:49,501 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:41:49,502 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:41:49,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:41:49,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28bbbd8f2/022f12dc862941d1b56ef1d1b6e0c254/FLAG70f97e265 [2020-10-27 23:41:50,352 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:41:50,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:41:50,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28bbbd8f2/022f12dc862941d1b56ef1d1b6e0c254/FLAG70f97e265 [2020-10-27 23:41:50,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28bbbd8f2/022f12dc862941d1b56ef1d1b6e0c254 [2020-10-27 23:41:50,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:41:50,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:41:50,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:50,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:41:50,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:41:50,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:50" (1/1) ... [2020-10-27 23:41:50,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d75239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:50, skipping insertion in model container [2020-10-27 23:41:50,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:50" (1/1) ... [2020-10-27 23:41:50,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:41:50,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:41:51,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:51,138 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:41:51,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:51,324 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:41:51,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51 WrapperNode [2020-10-27 23:41:51,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:51,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:41:51,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:41:51,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:41:51,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (1/1) ... [2020-10-27 23:41:51,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (1/1) ... [2020-10-27 23:41:51,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (1/1) ... [2020-10-27 23:41:51,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (1/1) ... [2020-10-27 23:41:51,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (1/1) ... [2020-10-27 23:41:51,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (1/1) ... [2020-10-27 23:41:51,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (1/1) ... [2020-10-27 23:41:51,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:41:51,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:41:51,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:41:51,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:41:51,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:41:51,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:41:51,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:41:51,597 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:41:51,598 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:41:51,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:41:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:41:51,599 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:41:51,599 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:41:51,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:41:51,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:41:51,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:41:51,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:41:51,601 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:41:51,603 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:41:51,603 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:41:51,604 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:41:51,604 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:41:51,604 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:41:51,604 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:41:51,604 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:41:51,605 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:41:51,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:41:51,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:41:51,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:41:51,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:41:51,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:41:51,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:41:51,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:41:52,886 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:41:52,887 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:41:52,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:52 BoogieIcfgContainer [2020-10-27 23:41:52,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:41:52,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:41:52,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:41:52,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:41:52,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:41:50" (1/3) ... [2020-10-27 23:41:52,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a3f48b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:52, skipping insertion in model container [2020-10-27 23:41:52,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:51" (2/3) ... [2020-10-27 23:41:52,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a3f48b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:52, skipping insertion in model container [2020-10-27 23:41:52,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:52" (3/3) ... [2020-10-27 23:41:52,901 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:41:52,911 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:41:52,916 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:41:52,931 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:41:52,958 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:41:52,958 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:41:52,959 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:41:52,959 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:41:52,959 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:41:52,959 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:41:52,959 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:41:52,959 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:41:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-27 23:41:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 23:41:52,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:52,994 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] [2020-10-27 23:41:52,994 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1835724327, now seen corresponding path program 1 times [2020-10-27 23:41:53,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:53,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368378769] [2020-10-27 23:41:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:53,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:58,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 23:41:58,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:41:58,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:41:58,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:58,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:41:58,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:58,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:41:58,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:41:58,854 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:58,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:58,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:58,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:58,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:58,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:41:58,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:58,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:58,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:58,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:58,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:58,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368378769] [2020-10-27 23:41:58,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:58,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:41:58,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524643984] [2020-10-27 23:41:58,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:41:58,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:41:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:41:58,948 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 9 states. [2020-10-27 23:41:59,344 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 23:42:00,993 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:02,577 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:02,648 INFO L93 Difference]: Finished difference Result 510 states and 827 transitions. [2020-10-27 23:42:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:42:02,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-27 23:42:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:02,669 INFO L225 Difference]: With dead ends: 510 [2020-10-27 23:42:02,670 INFO L226 Difference]: Without dead ends: 410 [2020-10-27 23:42:02,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-27 23:42:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-27 23:42:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 224. [2020-10-27 23:42:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-27 23:42:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2020-10-27 23:42:02,748 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 51 [2020-10-27 23:42:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:02,749 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2020-10-27 23:42:02,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:42:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2020-10-27 23:42:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 23:42:02,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:02,753 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] [2020-10-27 23:42:02,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:42:02,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:02,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1735177672, now seen corresponding path program 1 times [2020-10-27 23:42:02,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:02,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529881070] [2020-10-27 23:42:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:07,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 23:42:07,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:42:07,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:42:07,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:07,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:42:07,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:07,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 23:42:07,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:08,047 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:08,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:08,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:08,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:08,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:08,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:42:08,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:08,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:08,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:08,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:08,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:42:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:08,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529881070] [2020-10-27 23:42:08,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:08,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:42:08,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347963398] [2020-10-27 23:42:08,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:42:08,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:42:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:42:08,102 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand 7 states. [2020-10-27 23:42:08,362 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:09,244 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:09,479 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:09,761 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:10,001 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:10,628 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:10,840 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:42:11,207 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:42:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:11,241 INFO L93 Difference]: Finished difference Result 916 states and 1277 transitions. [2020-10-27 23:42:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:42:11,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-27 23:42:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:11,248 INFO L225 Difference]: With dead ends: 916 [2020-10-27 23:42:11,249 INFO L226 Difference]: Without dead ends: 774 [2020-10-27 23:42:11,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:42:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-27 23:42:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 375. [2020-10-27 23:42:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-27 23:42:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 518 transitions. [2020-10-27 23:42:11,307 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 518 transitions. Word has length 51 [2020-10-27 23:42:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:11,307 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 518 transitions. [2020-10-27 23:42:11,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:42:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 518 transitions. [2020-10-27 23:42:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:42:11,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:11,311 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] [2020-10-27 23:42:11,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:42:11,311 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:11,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2094149536, now seen corresponding path program 1 times [2020-10-27 23:42:11,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:11,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813037343] [2020-10-27 23:42:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:11,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:16,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:42:16,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:42:16,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:42:16,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:16,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:42:16,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:42:16,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:42:16,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:16,632 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:16,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:16,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:16,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:16,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:16,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 23:42:16,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:16,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:16,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813037343] [2020-10-27 23:42:16,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:16,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:42:16,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318483397] [2020-10-27 23:42:16,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:42:16,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:16,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:42:16,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:42:16,684 INFO L87 Difference]: Start difference. First operand 375 states and 518 transitions. Second operand 7 states. [2020-10-27 23:42:16,915 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:17,752 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:17,997 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:18,216 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:18,401 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:19,093 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:42:19,309 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:19,612 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:42:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:19,642 INFO L93 Difference]: Finished difference Result 1668 states and 2419 transitions. [2020-10-27 23:42:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:42:19,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-27 23:42:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:19,651 INFO L225 Difference]: With dead ends: 1668 [2020-10-27 23:42:19,651 INFO L226 Difference]: Without dead ends: 1468 [2020-10-27 23:42:19,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:42:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2020-10-27 23:42:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 596. [2020-10-27 23:42:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-10-27 23:42:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 846 transitions. [2020-10-27 23:42:19,746 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 846 transitions. Word has length 52 [2020-10-27 23:42:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:19,746 INFO L481 AbstractCegarLoop]: Abstraction has 596 states and 846 transitions. [2020-10-27 23:42:19,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:42:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 846 transitions. [2020-10-27 23:42:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:42:19,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:19,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:19,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:42:19,750 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash -814936231, now seen corresponding path program 1 times [2020-10-27 23:42:19,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:19,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973886229] [2020-10-27 23:42:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:19,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:24,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:42:24,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 23:42:24,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:42:24,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:42:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:42:24,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:42:24,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:25,154 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:25,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:25,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:25,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:25,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:42:25,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:25,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:25,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:25,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:25,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:25,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973886229] [2020-10-27 23:42:25,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:25,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:42:25,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265779812] [2020-10-27 23:42:25,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:42:25,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:25,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:42:25,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:42:25,205 INFO L87 Difference]: Start difference. First operand 596 states and 846 transitions. Second operand 7 states. [2020-10-27 23:42:25,429 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:26,237 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:26,508 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:26,787 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:27,000 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:27,654 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:27,879 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:42:28,224 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:42:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:28,271 INFO L93 Difference]: Finished difference Result 2078 states and 3031 transitions. [2020-10-27 23:42:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:42:28,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-27 23:42:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:28,282 INFO L225 Difference]: With dead ends: 2078 [2020-10-27 23:42:28,282 INFO L226 Difference]: Without dead ends: 1763 [2020-10-27 23:42:28,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:42:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2020-10-27 23:42:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 725. [2020-10-27 23:42:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2020-10-27 23:42:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1041 transitions. [2020-10-27 23:42:28,361 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1041 transitions. Word has length 52 [2020-10-27 23:42:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:28,361 INFO L481 AbstractCegarLoop]: Abstraction has 725 states and 1041 transitions. [2020-10-27 23:42:28,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:42:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1041 transitions. [2020-10-27 23:42:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:28,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:28,363 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] [2020-10-27 23:42:28,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:42:28,364 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash 665008279, now seen corresponding path program 1 times [2020-10-27 23:42:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:28,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409302593] [2020-10-27 23:42:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:28,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:33,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:33,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:42:33,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:42:33,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:33,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:33,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:33,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:42:33,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:33,746 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:33,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:33,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:33,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:33,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:42:33,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:33,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:33,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:33,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409302593] [2020-10-27 23:42:33,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:33,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:33,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484439042] [2020-10-27 23:42:33,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:33,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:33,783 INFO L87 Difference]: Start difference. First operand 725 states and 1041 transitions. Second operand 10 states. [2020-10-27 23:42:34,018 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:34,932 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:42:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:35,383 INFO L93 Difference]: Finished difference Result 1458 states and 2134 transitions. [2020-10-27 23:42:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:42:35,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 23:42:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:35,390 INFO L225 Difference]: With dead ends: 1458 [2020-10-27 23:42:35,391 INFO L226 Difference]: Without dead ends: 1134 [2020-10-27 23:42:35,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:42:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2020-10-27 23:42:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 707. [2020-10-27 23:42:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-10-27 23:42:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1013 transitions. [2020-10-27 23:42:35,467 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1013 transitions. Word has length 53 [2020-10-27 23:42:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:35,468 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 1013 transitions. [2020-10-27 23:42:35,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1013 transitions. [2020-10-27 23:42:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:35,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:35,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:35,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:42:35,470 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash 765554934, now seen corresponding path program 1 times [2020-10-27 23:42:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:35,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008821249] [2020-10-27 23:42:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:40,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:40,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 23:42:40,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:42:40,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:42:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:40,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:42:40,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:40,897 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:40,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:40,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:40,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:40,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:40,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:42:40,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:40,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:40,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:40,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:40,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:40,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008821249] [2020-10-27 23:42:40,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:40,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:42:40,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818232952] [2020-10-27 23:42:40,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:42:40,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:40,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:42:40,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:42:40,951 INFO L87 Difference]: Start difference. First operand 707 states and 1013 transitions. Second operand 11 states. [2020-10-27 23:42:41,195 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:42,252 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:42,453 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:42,778 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:42:44,276 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:44,950 INFO L93 Difference]: Finished difference Result 2882 states and 4213 transitions. [2020-10-27 23:42:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 23:42:44,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 23:42:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:44,967 INFO L225 Difference]: With dead ends: 2882 [2020-10-27 23:42:44,967 INFO L226 Difference]: Without dead ends: 2876 [2020-10-27 23:42:44,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=327, Invalid=1479, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 23:42:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2020-10-27 23:42:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 707. [2020-10-27 23:42:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-10-27 23:42:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1011 transitions. [2020-10-27 23:42:45,108 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1011 transitions. Word has length 53 [2020-10-27 23:42:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:45,109 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 1011 transitions. [2020-10-27 23:42:45,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:42:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1011 transitions. [2020-10-27 23:42:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:45,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:45,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:45,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:42:45,111 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash -810089130, now seen corresponding path program 1 times [2020-10-27 23:42:45,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:45,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076042585] [2020-10-27 23:42:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:45,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:46,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:47,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:50,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:50,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:50,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:50,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 23:42:50,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:42:50,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:50,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:42:50,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:50,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:42:50,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:50,415 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:50,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:50,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:50,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:50,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:50,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:42:50,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:50,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:50,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076042585] [2020-10-27 23:42:50,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:50,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:42:50,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989272909] [2020-10-27 23:42:50,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:42:50,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:42:50,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:42:50,454 INFO L87 Difference]: Start difference. First operand 707 states and 1011 transitions. Second operand 9 states. [2020-10-27 23:42:50,670 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:51,442 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:52,190 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:52,411 INFO L93 Difference]: Finished difference Result 2412 states and 3543 transitions. [2020-10-27 23:42:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:42:52,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 23:42:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:52,422 INFO L225 Difference]: With dead ends: 2412 [2020-10-27 23:42:52,422 INFO L226 Difference]: Without dead ends: 2136 [2020-10-27 23:42:52,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-27 23:42:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2020-10-27 23:42:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 714. [2020-10-27 23:42:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2020-10-27 23:42:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1019 transitions. [2020-10-27 23:42:52,526 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1019 transitions. Word has length 53 [2020-10-27 23:42:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:52,527 INFO L481 AbstractCegarLoop]: Abstraction has 714 states and 1019 transitions. [2020-10-27 23:42:52,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:42:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1019 transitions. [2020-10-27 23:42:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:52,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:52,528 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] [2020-10-27 23:42:52,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:42:52,529 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1406790542, now seen corresponding path program 1 times [2020-10-27 23:42:52,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:52,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072184350] [2020-10-27 23:42:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:52,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:55,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:55,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:57,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:57,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:42:57,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:42:57,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:42:57,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:57,780 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:57,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:57,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:57,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:57,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:57,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:42:57,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:57,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:57,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072184350] [2020-10-27 23:42:57,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:57,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:57,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274443988] [2020-10-27 23:42:57,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:57,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:57,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:57,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:57,811 INFO L87 Difference]: Start difference. First operand 714 states and 1019 transitions. Second operand 6 states. [2020-10-27 23:42:58,029 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:59,008 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:59,325 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:00,212 INFO L93 Difference]: Finished difference Result 2218 states and 3277 transitions. [2020-10-27 23:43:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:43:00,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:43:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:00,221 INFO L225 Difference]: With dead ends: 2218 [2020-10-27 23:43:00,222 INFO L226 Difference]: Without dead ends: 1887 [2020-10-27 23:43:00,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2020-10-27 23:43:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1149. [2020-10-27 23:43:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1149 states. [2020-10-27 23:43:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1668 transitions. [2020-10-27 23:43:00,390 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1668 transitions. Word has length 53 [2020-10-27 23:43:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:00,390 INFO L481 AbstractCegarLoop]: Abstraction has 1149 states and 1668 transitions. [2020-10-27 23:43:00,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1668 transitions. [2020-10-27 23:43:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:43:00,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:00,391 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] [2020-10-27 23:43:00,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:43:00,392 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash -168853522, now seen corresponding path program 1 times [2020-10-27 23:43:00,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:00,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923428927] [2020-10-27 23:43:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:03,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:05,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:43:05,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 23:43:05,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:43:05,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:05,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:43:05,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:43:05,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:43:05,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:05,747 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:05,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:05,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:05,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:05,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:05,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:43:05,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:05,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:05,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:05,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:05,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:05,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923428927] [2020-10-27 23:43:05,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:05,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:43:05,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701146860] [2020-10-27 23:43:05,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:43:05,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:05,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:43:05,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:43:05,805 INFO L87 Difference]: Start difference. First operand 1149 states and 1668 transitions. Second operand 9 states. [2020-10-27 23:43:06,020 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:43:06,914 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:07,536 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:07,686 INFO L93 Difference]: Finished difference Result 2728 states and 4034 transitions. [2020-10-27 23:43:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 23:43:07,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 23:43:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:07,697 INFO L225 Difference]: With dead ends: 2728 [2020-10-27 23:43:07,698 INFO L226 Difference]: Without dead ends: 2091 [2020-10-27 23:43:07,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:43:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-10-27 23:43:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1146. [2020-10-27 23:43:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1146 states. [2020-10-27 23:43:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1658 transitions. [2020-10-27 23:43:07,928 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1658 transitions. Word has length 53 [2020-10-27 23:43:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:07,928 INFO L481 AbstractCegarLoop]: Abstraction has 1146 states and 1658 transitions. [2020-10-27 23:43:07,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:43:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1658 transitions. [2020-10-27 23:43:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:43:07,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:07,930 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] [2020-10-27 23:43:07,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:43:07,930 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash -848849354, now seen corresponding path program 1 times [2020-10-27 23:43:07,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:07,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776111846] [2020-10-27 23:43:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:07,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:12,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:43:12,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:43:12,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:43:12,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:12,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:12,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:12,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:43:12,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:13,189 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:13,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:13,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:13,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:13,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:43:13,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:13,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:13,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:13,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776111846] [2020-10-27 23:43:13,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:13,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:13,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361240427] [2020-10-27 23:43:13,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:13,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:13,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:13,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:13,254 INFO L87 Difference]: Start difference. First operand 1146 states and 1658 transitions. Second operand 6 states. [2020-10-27 23:43:13,455 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:14,521 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:14,785 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:15,416 INFO L93 Difference]: Finished difference Result 2239 states and 3262 transitions. [2020-10-27 23:43:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:43:15,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:43:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:15,424 INFO L225 Difference]: With dead ends: 2239 [2020-10-27 23:43:15,424 INFO L226 Difference]: Without dead ends: 2021 [2020-10-27 23:43:15,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2020-10-27 23:43:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1508. [2020-10-27 23:43:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1508 states. [2020-10-27 23:43:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 2197 transitions. [2020-10-27 23:43:15,670 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 2197 transitions. Word has length 53 [2020-10-27 23:43:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:15,670 INFO L481 AbstractCegarLoop]: Abstraction has 1508 states and 2197 transitions. [2020-10-27 23:43:15,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 2197 transitions. [2020-10-27 23:43:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:15,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:15,671 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] [2020-10-27 23:43:15,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:43:15,672 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:15,672 INFO L82 PathProgramCache]: Analyzing trace with hash 821806044, now seen corresponding path program 1 times [2020-10-27 23:43:15,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:15,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444937601] [2020-10-27 23:43:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:16,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:18,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:20,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:20,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:43:20,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:43:20,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:43:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:20,911 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:20,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:20,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:20,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:20,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:20,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:43:20,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:20,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:20,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444937601] [2020-10-27 23:43:20,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:20,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986755443] [2020-10-27 23:43:20,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:20,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:20,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:20,943 INFO L87 Difference]: Start difference. First operand 1508 states and 2197 transitions. Second operand 6 states. [2020-10-27 23:43:21,154 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:22,136 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:22,396 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:24,096 INFO L93 Difference]: Finished difference Result 9037 states and 13642 transitions. [2020-10-27 23:43:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:43:24,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:43:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:24,129 INFO L225 Difference]: With dead ends: 9037 [2020-10-27 23:43:24,129 INFO L226 Difference]: Without dead ends: 8049 [2020-10-27 23:43:24,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8049 states. [2020-10-27 23:43:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8049 to 4172. [2020-10-27 23:43:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4172 states. [2020-10-27 23:43:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 6232 transitions. [2020-10-27 23:43:24,855 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 6232 transitions. Word has length 54 [2020-10-27 23:43:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:24,856 INFO L481 AbstractCegarLoop]: Abstraction has 4172 states and 6232 transitions. [2020-10-27 23:43:24,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 6232 transitions. [2020-10-27 23:43:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:24,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:24,857 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] [2020-10-27 23:43:24,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:43:24,858 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash -104077909, now seen corresponding path program 1 times [2020-10-27 23:43:24,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:24,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253035143] [2020-10-27 23:43:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:24,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:26,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:26,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:26,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:27,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:29,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:29,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:43:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:43:29,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:43:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:30,233 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:30,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:30,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:30,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:30,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:30,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:30,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:30,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:30,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253035143] [2020-10-27 23:43:30,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:30,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:30,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471438940] [2020-10-27 23:43:30,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:30,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:30,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:30,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:30,262 INFO L87 Difference]: Start difference. First operand 4172 states and 6232 transitions. Second operand 10 states. [2020-10-27 23:43:30,553 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:43:31,802 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 23:43:32,037 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:33,612 INFO L93 Difference]: Finished difference Result 8430 states and 12615 transitions. [2020-10-27 23:43:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 23:43:33,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:43:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:33,634 INFO L225 Difference]: With dead ends: 8430 [2020-10-27 23:43:33,634 INFO L226 Difference]: Without dead ends: 8423 [2020-10-27 23:43:33,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2020-10-27 23:43:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8423 states. [2020-10-27 23:43:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8423 to 4206. [2020-10-27 23:43:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4206 states. [2020-10-27 23:43:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 6279 transitions. [2020-10-27 23:43:34,287 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 6279 transitions. Word has length 54 [2020-10-27 23:43:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:34,288 INFO L481 AbstractCegarLoop]: Abstraction has 4206 states and 6279 transitions. [2020-10-27 23:43:34,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 6279 transitions. [2020-10-27 23:43:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:34,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:34,290 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] [2020-10-27 23:43:34,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:43:34,290 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash -774726588, now seen corresponding path program 1 times [2020-10-27 23:43:34,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:34,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509022090] [2020-10-27 23:43:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:34,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:36,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:36,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:36,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:39,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:39,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:39,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:43:39,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:43:39,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:43:39,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:39,619 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:39,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:39,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:39,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:39,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:39,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:39,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:43:39,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:39,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:39,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509022090] [2020-10-27 23:43:39,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:39,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:39,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376264001] [2020-10-27 23:43:39,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:39,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:39,643 INFO L87 Difference]: Start difference. First operand 4206 states and 6279 transitions. Second operand 10 states. [2020-10-27 23:43:39,990 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 23:43:40,942 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:42,507 INFO L93 Difference]: Finished difference Result 7884 states and 11893 transitions. [2020-10-27 23:43:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:43:42,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:43:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:42,524 INFO L225 Difference]: With dead ends: 7884 [2020-10-27 23:43:42,524 INFO L226 Difference]: Without dead ends: 7870 [2020-10-27 23:43:42,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:43:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7870 states. [2020-10-27 23:43:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7870 to 4206. [2020-10-27 23:43:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4206 states. [2020-10-27 23:43:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 6277 transitions. [2020-10-27 23:43:43,199 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 6277 transitions. Word has length 54 [2020-10-27 23:43:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:43,199 INFO L481 AbstractCegarLoop]: Abstraction has 4206 states and 6277 transitions. [2020-10-27 23:43:43,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 6277 transitions. [2020-10-27 23:43:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:43,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:43,201 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] [2020-10-27 23:43:43,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:43:43,201 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:43,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1000981818, now seen corresponding path program 1 times [2020-10-27 23:43:43,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:43,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134546429] [2020-10-27 23:43:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:48,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:48,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:43:48,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:43:48,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:43:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:43:48,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:48,465 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:48,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:48,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:48,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:48,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:48,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:48,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:48,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:48,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:48,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134546429] [2020-10-27 23:43:48,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:48,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:48,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527428599] [2020-10-27 23:43:48,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:48,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:48,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:48,489 INFO L87 Difference]: Start difference. First operand 4206 states and 6277 transitions. Second operand 6 states. [2020-10-27 23:43:48,701 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:49,783 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:49,990 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:52,128 INFO L93 Difference]: Finished difference Result 10234 states and 15396 transitions. [2020-10-27 23:43:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:43:52,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:43:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:52,150 INFO L225 Difference]: With dead ends: 10234 [2020-10-27 23:43:52,151 INFO L226 Difference]: Without dead ends: 10216 [2020-10-27 23:43:52,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10216 states. [2020-10-27 23:43:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10216 to 4204. [2020-10-27 23:43:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4204 states. [2020-10-27 23:43:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 6272 transitions. [2020-10-27 23:43:52,897 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 6272 transitions. Word has length 54 [2020-10-27 23:43:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:52,897 INFO L481 AbstractCegarLoop]: Abstraction has 4204 states and 6272 transitions. [2020-10-27 23:43:52,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 6272 transitions. [2020-10-27 23:43:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:52,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:52,899 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] [2020-10-27 23:43:52,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:43:52,900 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:52,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1305644853, now seen corresponding path program 1 times [2020-10-27 23:43:52,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:52,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168416230] [2020-10-27 23:43:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:52,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:52,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:53,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:53,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:53,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:53,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:53,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:53,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:57,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:57,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:43:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:43:57,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:43:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:58,142 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:58,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:58,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:58,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:58,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:58,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:58,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:58,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168416230] [2020-10-27 23:43:58,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:58,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:58,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097787022] [2020-10-27 23:43:58,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:58,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:58,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:58,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:58,166 INFO L87 Difference]: Start difference. First operand 4204 states and 6272 transitions. Second operand 6 states. [2020-10-27 23:43:58,384 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:59,410 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:59,688 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:44:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:02,179 INFO L93 Difference]: Finished difference Result 10349 states and 15567 transitions. [2020-10-27 23:44:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:02,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:44:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:02,197 INFO L225 Difference]: With dead ends: 10349 [2020-10-27 23:44:02,197 INFO L226 Difference]: Without dead ends: 10342 [2020-10-27 23:44:02,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:44:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2020-10-27 23:44:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 4204. [2020-10-27 23:44:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4204 states. [2020-10-27 23:44:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 6268 transitions. [2020-10-27 23:44:02,823 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 6268 transitions. Word has length 54 [2020-10-27 23:44:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:02,823 INFO L481 AbstractCegarLoop]: Abstraction has 4204 states and 6268 transitions. [2020-10-27 23:44:02,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:44:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 6268 transitions. [2020-10-27 23:44:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:44:02,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:02,825 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] [2020-10-27 23:44:02,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:44:02,825 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash -606016130, now seen corresponding path program 1 times [2020-10-27 23:44:02,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:02,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101341251] [2020-10-27 23:44:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:02,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:02,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:02,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:07,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:44:07,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:44:07,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:44:07,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:07,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:44:07,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:44:07,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:44:07,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:08,208 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:08,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:08,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:08,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:08,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:08,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:44:08,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:08,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:08,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:08,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:08,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:08,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101341251] [2020-10-27 23:44:08,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:08,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:44:08,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781469291] [2020-10-27 23:44:08,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:44:08,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:44:08,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:44:08,238 INFO L87 Difference]: Start difference. First operand 4204 states and 6268 transitions. Second operand 11 states. [2020-10-27 23:44:08,552 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 23:44:09,727 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:44:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:11,104 INFO L93 Difference]: Finished difference Result 5916 states and 8821 transitions. [2020-10-27 23:44:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:44:11,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-27 23:44:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:11,113 INFO L225 Difference]: With dead ends: 5916 [2020-10-27 23:44:11,113 INFO L226 Difference]: Without dead ends: 5908 [2020-10-27 23:44:11,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-27 23:44:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2020-10-27 23:44:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4204. [2020-10-27 23:44:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4204 states. [2020-10-27 23:44:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 6266 transitions. [2020-10-27 23:44:11,895 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 6266 transitions. Word has length 54 [2020-10-27 23:44:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:11,896 INFO L481 AbstractCegarLoop]: Abstraction has 4204 states and 6266 transitions. [2020-10-27 23:44:11,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:44:11,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 6266 transitions. [2020-10-27 23:44:11,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:44:11,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:11,897 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] [2020-10-27 23:44:11,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:44:11,897 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:11,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2006888863, now seen corresponding path program 1 times [2020-10-27 23:44:11,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:11,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277669362] [2020-10-27 23:44:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:11,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:11,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:12,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:12,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:12,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:12,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:14,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:14,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:15,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:15,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:17,268 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:17,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:17,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:17,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:17,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:44:17,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:17,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:17,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:17,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:17,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:17,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277669362] [2020-10-27 23:44:17,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:17,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:17,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795850463] [2020-10-27 23:44:17,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:17,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:17,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:17,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:17,302 INFO L87 Difference]: Start difference. First operand 4204 states and 6266 transitions. Second operand 10 states. [2020-10-27 23:44:17,582 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 23:44:19,099 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:44:20,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:20,694 INFO L93 Difference]: Finished difference Result 5949 states and 8789 transitions. [2020-10-27 23:44:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 23:44:20,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:44:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:20,701 INFO L225 Difference]: With dead ends: 5949 [2020-10-27 23:44:20,701 INFO L226 Difference]: Without dead ends: 5944 [2020-10-27 23:44:20,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 23:44:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2020-10-27 23:44:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 4204. [2020-10-27 23:44:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4204 states. [2020-10-27 23:44:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 6266 transitions. [2020-10-27 23:44:21,318 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 6266 transitions. Word has length 54 [2020-10-27 23:44:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:21,318 INFO L481 AbstractCegarLoop]: Abstraction has 4204 states and 6266 transitions. [2020-10-27 23:44:21,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 6266 transitions. [2020-10-27 23:44:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:44:21,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:21,320 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] [2020-10-27 23:44:21,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:44:21,320 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:21,320 INFO L82 PathProgramCache]: Analyzing trace with hash -58981995, now seen corresponding path program 1 times [2020-10-27 23:44:21,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:21,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516617052] [2020-10-27 23:44:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:21,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:24,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:24,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:24,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:24,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:24,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:24,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:25,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:26,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:26,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 23:44:26,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:44:26,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:26,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:44:26,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:44:26,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:44:26,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:26,680 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:26,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:26,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:26,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:26,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516617052] [2020-10-27 23:44:26,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:26,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:44:26,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464098654] [2020-10-27 23:44:26,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:44:26,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:44:26,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:44:26,706 INFO L87 Difference]: Start difference. First operand 4204 states and 6266 transitions. Second operand 11 states. [2020-10-27 23:44:26,934 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:44:28,088 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:44:28,320 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 23:44:29,627 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:44:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:30,432 INFO L93 Difference]: Finished difference Result 8956 states and 13151 transitions. [2020-10-27 23:44:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 23:44:30,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:44:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:30,444 INFO L225 Difference]: With dead ends: 8956 [2020-10-27 23:44:30,444 INFO L226 Difference]: Without dead ends: 8951 [2020-10-27 23:44:30,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-27 23:44:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8951 states. [2020-10-27 23:44:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8951 to 4197. [2020-10-27 23:44:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4197 states. [2020-10-27 23:44:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4197 states to 4197 states and 6257 transitions. [2020-10-27 23:44:31,086 INFO L78 Accepts]: Start accepts. Automaton has 4197 states and 6257 transitions. Word has length 55 [2020-10-27 23:44:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:31,086 INFO L481 AbstractCegarLoop]: Abstraction has 4197 states and 6257 transitions. [2020-10-27 23:44:31,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:44:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4197 states and 6257 transitions. [2020-10-27 23:44:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:44:31,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:31,087 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] [2020-10-27 23:44:31,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:44:31,087 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:31,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:31,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1397358309, now seen corresponding path program 1 times [2020-10-27 23:44:31,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:31,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716290288] [2020-10-27 23:44:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:31,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:33,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:33,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:33,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:33,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:33,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:44:36,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:36,362 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:36,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:36,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:36,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:36,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:36,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:44:36,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:36,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:36,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:36,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:36,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:36,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716290288] [2020-10-27 23:44:36,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:36,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:44:36,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927217352] [2020-10-27 23:44:36,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:44:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:36,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:44:36,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:44:36,398 INFO L87 Difference]: Start difference. First operand 4197 states and 6257 transitions. Second operand 6 states. [2020-10-27 23:44:36,654 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:44:37,662 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:44:37,877 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:44:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:39,106 INFO L93 Difference]: Finished difference Result 6781 states and 10157 transitions. [2020-10-27 23:44:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:39,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:44:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:39,111 INFO L225 Difference]: With dead ends: 6781 [2020-10-27 23:44:39,111 INFO L226 Difference]: Without dead ends: 5447 [2020-10-27 23:44:39,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:44:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2020-10-27 23:44:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 4180. [2020-10-27 23:44:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4180 states. [2020-10-27 23:44:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 6232 transitions. [2020-10-27 23:44:39,709 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 6232 transitions. Word has length 55 [2020-10-27 23:44:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:39,709 INFO L481 AbstractCegarLoop]: Abstraction has 4180 states and 6232 transitions. [2020-10-27 23:44:39,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:44:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 6232 transitions. [2020-10-27 23:44:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:44:39,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:39,710 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] [2020-10-27 23:44:39,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 23:44:39,711 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:39,711 INFO L82 PathProgramCache]: Analyzing trace with hash 821104462, now seen corresponding path program 1 times [2020-10-27 23:44:39,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:39,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119267715] [2020-10-27 23:44:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:39,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:40,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:42,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:44,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:44,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:44,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:44,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:44,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:44,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:44,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:44,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 23:44:44,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:44:44,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:44:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:44:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:44:44,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:45,087 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:45,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:45,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:45,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:45,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:45,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:45,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:45,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:45,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:45,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:45,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:45,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:45,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119267715] [2020-10-27 23:44:45,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:45,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:44:45,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829556565] [2020-10-27 23:44:45,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:44:45,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:45,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:44:45,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:44:45,151 INFO L87 Difference]: Start difference. First operand 4180 states and 6232 transitions. Second operand 11 states. [2020-10-27 23:44:45,403 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:44:46,666 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 23:44:46,918 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:44:48,368 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:44:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:49,262 INFO L93 Difference]: Finished difference Result 11072 states and 16408 transitions. [2020-10-27 23:44:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 23:44:49,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:44:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:49,273 INFO L225 Difference]: With dead ends: 11072 [2020-10-27 23:44:49,273 INFO L226 Difference]: Without dead ends: 8921 [2020-10-27 23:44:49,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2020-10-27 23:44:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8921 states. [2020-10-27 23:44:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8921 to 4170. [2020-10-27 23:44:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-10-27 23:44:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 6217 transitions. [2020-10-27 23:44:50,002 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 6217 transitions. Word has length 55 [2020-10-27 23:44:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:50,003 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states and 6217 transitions. [2020-10-27 23:44:50,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:44:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 6217 transitions. [2020-10-27 23:44:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:44:50,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:50,004 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] [2020-10-27 23:44:50,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 23:44:50,004 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash -72658479, now seen corresponding path program 1 times [2020-10-27 23:44:50,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:50,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007763251] [2020-10-27 23:44:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:50,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:55,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:55,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:55,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:44:55,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:44:55,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:55,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:55,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:44:55,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:44:55,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:55,393 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:55,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:55,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:55,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:55,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:55,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:55,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007763251] [2020-10-27 23:44:55,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:55,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:55,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756357496] [2020-10-27 23:44:55,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:55,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:55,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:55,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:55,421 INFO L87 Difference]: Start difference. First operand 4170 states and 6217 transitions. Second operand 10 states. [2020-10-27 23:44:55,664 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:44:56,776 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:44:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:57,776 INFO L93 Difference]: Finished difference Result 5129 states and 7667 transitions. [2020-10-27 23:44:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:57,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:44:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:57,782 INFO L225 Difference]: With dead ends: 5129 [2020-10-27 23:44:57,783 INFO L226 Difference]: Without dead ends: 5118 [2020-10-27 23:44:57,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:44:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2020-10-27 23:44:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4157. [2020-10-27 23:44:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4157 states. [2020-10-27 23:44:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 6201 transitions. [2020-10-27 23:44:58,480 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 6201 transitions. Word has length 55 [2020-10-27 23:44:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:58,481 INFO L481 AbstractCegarLoop]: Abstraction has 4157 states and 6201 transitions. [2020-10-27 23:44:58,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 6201 transitions. [2020-10-27 23:44:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:44:58,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:58,482 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] [2020-10-27 23:44:58,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 23:44:58,482 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:58,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1705406796, now seen corresponding path program 1 times [2020-10-27 23:44:58,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:58,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033739709] [2020-10-27 23:44:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:58,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:58,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:44:59,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:59,463 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:59,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:59,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:59,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:59,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:59,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:44:59,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:59,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:59,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:59,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:59,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033739709] [2020-10-27 23:44:59,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:59,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:44:59,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601339830] [2020-10-27 23:44:59,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:44:59,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:44:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:44:59,492 INFO L87 Difference]: Start difference. First operand 4157 states and 6201 transitions. Second operand 9 states. [2020-10-27 23:44:59,734 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 23:45:00,716 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:45:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:02,089 INFO L93 Difference]: Finished difference Result 6982 states and 10484 transitions. [2020-10-27 23:45:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:45:02,092 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-27 23:45:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:02,099 INFO L225 Difference]: With dead ends: 6982 [2020-10-27 23:45:02,100 INFO L226 Difference]: Without dead ends: 6975 [2020-10-27 23:45:02,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 23:45:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2020-10-27 23:45:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 4135. [2020-10-27 23:45:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4135 states. [2020-10-27 23:45:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 6162 transitions. [2020-10-27 23:45:02,791 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 6162 transitions. Word has length 56 [2020-10-27 23:45:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:02,791 INFO L481 AbstractCegarLoop]: Abstraction has 4135 states and 6162 transitions. [2020-10-27 23:45:02,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:45:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 6162 transitions. [2020-10-27 23:45:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:45:02,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:02,795 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] [2020-10-27 23:45:02,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 23:45:02,795 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash -291952864, now seen corresponding path program 1 times [2020-10-27 23:45:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:02,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470508978] [2020-10-27 23:45:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:02,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:02,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:03,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:45:03,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:45:03,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-27 23:45:03,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:03,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:45:03,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:45:03,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:45:03,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:03,844 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:45:03,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:03,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:03,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:03,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:03,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:45:03,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:03,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:03,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:03,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:03,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:03,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470508978] [2020-10-27 23:45:03,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:03,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:45:03,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694031000] [2020-10-27 23:45:03,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:45:03,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:45:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:45:03,874 INFO L87 Difference]: Start difference. First operand 4135 states and 6162 transitions. Second operand 8 states. [2020-10-27 23:45:04,133 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 23:45:05,018 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 23:45:05,262 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:45:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:06,685 INFO L93 Difference]: Finished difference Result 6891 states and 10328 transitions. [2020-10-27 23:45:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:45:06,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 23:45:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:06,692 INFO L225 Difference]: With dead ends: 6891 [2020-10-27 23:45:06,692 INFO L226 Difference]: Without dead ends: 6872 [2020-10-27 23:45:06,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:45:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6872 states. [2020-10-27 23:45:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 4135. [2020-10-27 23:45:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4135 states. [2020-10-27 23:45:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 6160 transitions. [2020-10-27 23:45:07,443 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 6160 transitions. Word has length 56 [2020-10-27 23:45:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:07,443 INFO L481 AbstractCegarLoop]: Abstraction has 4135 states and 6160 transitions. [2020-10-27 23:45:07,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:45:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 6160 transitions. [2020-10-27 23:45:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:45:07,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:07,445 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] [2020-10-27 23:45:07,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 23:45:07,446 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:07,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:07,446 INFO L82 PathProgramCache]: Analyzing trace with hash 740872116, now seen corresponding path program 1 times [2020-10-27 23:45:07,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:07,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473344566] [2020-10-27 23:45:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:07,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:07,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:07,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:07,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:07,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:07,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:08,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:10,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:10,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:11,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:12,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:12,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:45:12,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:45:12,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:45:12,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:45:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:45:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:45:12,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:12,807 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:45:12,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:12,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:12,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:12,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:12,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:12,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:45:12,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:12,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:12,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473344566] [2020-10-27 23:45:12,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:12,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:45:12,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994548312] [2020-10-27 23:45:12,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:45:12,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:45:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:45:12,834 INFO L87 Difference]: Start difference. First operand 4135 states and 6160 transitions. Second operand 12 states. [2020-10-27 23:45:13,365 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2020-10-27 23:45:14,601 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:45:16,735 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 23:45:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:18,434 INFO L93 Difference]: Finished difference Result 13384 states and 19934 transitions. [2020-10-27 23:45:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:45:18,435 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-27 23:45:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:18,450 INFO L225 Difference]: With dead ends: 13384 [2020-10-27 23:45:18,450 INFO L226 Difference]: Without dead ends: 13377 [2020-10-27 23:45:18,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 23:45:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13377 states. [2020-10-27 23:45:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13377 to 4140. [2020-10-27 23:45:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4140 states. [2020-10-27 23:45:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6167 transitions. [2020-10-27 23:45:19,211 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6167 transitions. Word has length 56 [2020-10-27 23:45:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:19,212 INFO L481 AbstractCegarLoop]: Abstraction has 4140 states and 6167 transitions. [2020-10-27 23:45:19,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:45:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6167 transitions. [2020-10-27 23:45:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:45:19,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:19,213 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] [2020-10-27 23:45:19,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 23:45:19,213 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1312951256, now seen corresponding path program 1 times [2020-10-27 23:45:19,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:19,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664285745] [2020-10-27 23:45:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:19,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:19,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:23,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:23,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:24,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:45:24,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:24,534 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:45:24,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:24,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:24,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:24,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:24,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:24,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:45:24,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:24,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:24,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:24,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:24,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:24,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664285745] [2020-10-27 23:45:24,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:24,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:45:24,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226819172] [2020-10-27 23:45:24,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:45:24,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:45:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:45:24,565 INFO L87 Difference]: Start difference. First operand 4140 states and 6167 transitions. Second operand 9 states. [2020-10-27 23:45:24,777 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:45:25,718 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:45:26,818 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:45:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:27,648 INFO L93 Difference]: Finished difference Result 10606 states and 15901 transitions. [2020-10-27 23:45:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:45:27,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-27 23:45:27,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:27,656 INFO L225 Difference]: With dead ends: 10606 [2020-10-27 23:45:27,656 INFO L226 Difference]: Without dead ends: 7187 [2020-10-27 23:45:27,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:45:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2020-10-27 23:45:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 3362. [2020-10-27 23:45:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3362 states. [2020-10-27 23:45:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 4996 transitions. [2020-10-27 23:45:28,386 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 4996 transitions. Word has length 56 [2020-10-27 23:45:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:28,386 INFO L481 AbstractCegarLoop]: Abstraction has 3362 states and 4996 transitions. [2020-10-27 23:45:28,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:45:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 4996 transitions. [2020-10-27 23:45:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:45:28,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:28,388 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] [2020-10-27 23:45:28,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 23:45:28,389 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:28,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:28,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2044382534, now seen corresponding path program 1 times [2020-10-27 23:45:28,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:28,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686527800] [2020-10-27 23:45:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:28,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:45:28,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:29,250 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:45:29,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:29,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:29,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:29,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:45:29,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:29,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:29,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686527800] [2020-10-27 23:45:29,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:29,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:45:29,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793301648] [2020-10-27 23:45:29,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:45:29,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:29,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:45:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:45:29,278 INFO L87 Difference]: Start difference. First operand 3362 states and 4996 transitions. Second operand 9 states. [2020-10-27 23:45:29,524 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 23:45:30,538 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:45:30,803 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 172