/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:41:10,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:41:10,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:41:10,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:41:10,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:41:10,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:41:10,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:41:10,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:41:10,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:41:10,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:41:10,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:41:10,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:41:10,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:41:10,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:41:10,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:41:10,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:41:10,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:41:10,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:41:10,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:41:11,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:41:11,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:41:11,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:41:11,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:41:11,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:41:11,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:41:11,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:41:11,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:41:11,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:41:11,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:41:11,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:41:11,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:41:11,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:41:11,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:41:11,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:41:11,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:41:11,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:41:11,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:41:11,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:41:11,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:41:11,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:41:11,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:41:11,044 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 [2020-10-26 22:41:11,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:41:11,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:41:11,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:41:11,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:41:11,099 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:41:11,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:41:11,099 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:41:11,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:41:11,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:41:11,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:41:11,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:41:11,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:41:11,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:41:11,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:41:11,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:41:11,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:41:11,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:41:11,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:41:11,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:41:11,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:41:11,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:41:11,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:41:11,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:41:11,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:41:11,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:41:11,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:41:11,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:41:11,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:41:11,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:41:11,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:41:11,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:41:11,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:41:11,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:41:11,569 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:41:11,570 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:41:11,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label32.c [2020-10-26 22:41:11,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce7dcdc94/60130c1417c74c2080e41bc6af1d3de0/FLAGf34e190fa [2020-10-26 22:41:12,515 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:41:12,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label32.c [2020-10-26 22:41:12,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce7dcdc94/60130c1417c74c2080e41bc6af1d3de0/FLAGf34e190fa [2020-10-26 22:41:12,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce7dcdc94/60130c1417c74c2080e41bc6af1d3de0 [2020-10-26 22:41:12,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:41:12,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:41:12,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:41:12,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:41:12,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:41:12,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:41:12" (1/1) ... [2020-10-26 22:41:12,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21cece66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:12, skipping insertion in model container [2020-10-26 22:41:12,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:41:12" (1/1) ... [2020-10-26 22:41:12,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:41:12,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:41:13,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:41:13,453 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:41:13,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:41:13,707 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:41:13,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13 WrapperNode [2020-10-26 22:41:13,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:41:13,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:41:13,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:41:13,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:41:13,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (1/1) ... [2020-10-26 22:41:13,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (1/1) ... [2020-10-26 22:41:13,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (1/1) ... [2020-10-26 22:41:13,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (1/1) ... [2020-10-26 22:41:13,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (1/1) ... [2020-10-26 22:41:13,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (1/1) ... [2020-10-26 22:41:13,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (1/1) ... [2020-10-26 22:41:13,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:41:13,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:41:13,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:41:13,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:41:13,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (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 [2020-10-26 22:41:13,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:41:13,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:41:13,972 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:41:13,972 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:41:13,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:41:13,972 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:41:13,972 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:41:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:41:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:41:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:41:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:41:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:41:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:41:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:41:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:41:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:41:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:41:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:41:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:41:15,654 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:41:15,654 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:41:15,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:41:15 BoogieIcfgContainer [2020-10-26 22:41:15,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:41:15,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:41:15,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:41:15,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:41:15,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:41:12" (1/3) ... [2020-10-26 22:41:15,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6f8202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:41:15, skipping insertion in model container [2020-10-26 22:41:15,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:13" (2/3) ... [2020-10-26 22:41:15,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6f8202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:41:15, skipping insertion in model container [2020-10-26 22:41:15,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:41:15" (3/3) ... [2020-10-26 22:41:15,666 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label32.c [2020-10-26 22:41:15,677 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:41:15,682 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:41:15,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:41:15,724 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:41:15,725 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:41:15,725 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:41:15,725 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:41:15,725 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:41:15,725 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:41:15,725 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:41:15,726 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:41:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-26 22:41:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 22:41:15,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:15,759 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] [2020-10-26 22:41:15,759 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:15,766 INFO L82 PathProgramCache]: Analyzing trace with hash 72405502, now seen corresponding path program 1 times [2020-10-26 22:41:15,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:15,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554816650] [2020-10-26 22:41:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:16,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:16,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 22:41:16,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:16,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-26 22:41:16,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:16,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:41:16,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:41:16,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 22:41:16,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:41:16,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:16,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:16,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:16,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:16,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:16,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 22:41:16,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:16,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:41:16,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:41:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:41:16,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554816650] [2020-10-26 22:41:16,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:41:16,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:41:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158871151] [2020-10-26 22:41:16,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:41:16,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:16,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:41:16,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:41:16,994 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 4 states. [2020-10-26 22:41:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:19,964 INFO L93 Difference]: Finished difference Result 810 states and 1408 transitions. [2020-10-26 22:41:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:41:19,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-26 22:41:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:19,984 INFO L225 Difference]: With dead ends: 810 [2020-10-26 22:41:19,984 INFO L226 Difference]: Without dead ends: 434 [2020-10-26 22:41:19,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:41:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-26 22:41:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 425. [2020-10-26 22:41:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-26 22:41:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 612 transitions. [2020-10-26 22:41:20,080 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 612 transitions. Word has length 47 [2020-10-26 22:41:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:20,081 INFO L481 AbstractCegarLoop]: Abstraction has 425 states and 612 transitions. [2020-10-26 22:41:20,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:41:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 612 transitions. [2020-10-26 22:41:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-26 22:41:20,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:20,088 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:20,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:41:20,088 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1790094947, now seen corresponding path program 1 times [2020-10-26 22:41:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:20,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971155092] [2020-10-26 22:41:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:20,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:20,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:21,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:22,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:22,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 22:41:22,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:41:22,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1951 [2020-10-26 22:41:22,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:22,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:41:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:41:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:41:22,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:41:22,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:22,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:22,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:22,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:22,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:22,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:41:22,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:22,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:41:22,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:22,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:22,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:22,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:22,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:41:22,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:22,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-26 22:41:22,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:41:22,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:41:22,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971155092] [2020-10-26 22:41:22,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:41:22,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:41:22,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453195078] [2020-10-26 22:41:22,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:22,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:22,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:22,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:22,632 INFO L87 Difference]: Start difference. First operand 425 states and 612 transitions. Second operand 7 states. [2020-10-26 22:41:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:25,804 INFO L93 Difference]: Finished difference Result 1269 states and 1867 transitions. [2020-10-26 22:41:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:41:25,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2020-10-26 22:41:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:25,822 INFO L225 Difference]: With dead ends: 1269 [2020-10-26 22:41:25,823 INFO L226 Difference]: Without dead ends: 850 [2020-10-26 22:41:25,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:41:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-10-26 22:41:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 818. [2020-10-26 22:41:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2020-10-26 22:41:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1127 transitions. [2020-10-26 22:41:25,925 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1127 transitions. Word has length 119 [2020-10-26 22:41:25,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:25,928 INFO L481 AbstractCegarLoop]: Abstraction has 818 states and 1127 transitions. [2020-10-26 22:41:25,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:25,928 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1127 transitions. [2020-10-26 22:41:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 22:41:25,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:25,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:25,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:41:25,939 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1469704231, now seen corresponding path program 1 times [2020-10-26 22:41:25,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:25,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090346422] [2020-10-26 22:41:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:26,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:26,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:26,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:27,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:27,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 22:41:27,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:41:27,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1616 [2020-10-26 22:41:27,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:27,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:41:27,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:41:27,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:41:27,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:27,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:27,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:27,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:27,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:27,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:27,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 22:41:27,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:27,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:27,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:27,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:41:27,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:27,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:27,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:27,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:27,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:41:27,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:27,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 22:41:27,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:27,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:27,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:27,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:41:27,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:41:28,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090346422] [2020-10-26 22:41:28,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:41:28,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:41:28,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639195940] [2020-10-26 22:41:28,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:28,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:28,092 INFO L87 Difference]: Start difference. First operand 818 states and 1127 transitions. Second operand 7 states. [2020-10-26 22:41:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:31,412 INFO L93 Difference]: Finished difference Result 1845 states and 2608 transitions. [2020-10-26 22:41:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:41:31,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-10-26 22:41:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:31,419 INFO L225 Difference]: With dead ends: 1845 [2020-10-26 22:41:31,419 INFO L226 Difference]: Without dead ends: 1033 [2020-10-26 22:41:31,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:41:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-26 22:41:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1010. [2020-10-26 22:41:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-10-26 22:41:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1269 transitions. [2020-10-26 22:41:31,458 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1269 transitions. Word has length 121 [2020-10-26 22:41:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:31,459 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1269 transitions. [2020-10-26 22:41:31,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1269 transitions. [2020-10-26 22:41:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 22:41:31,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:31,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:31,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:41:31,463 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:31,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:31,463 INFO L82 PathProgramCache]: Analyzing trace with hash 263965449, now seen corresponding path program 1 times [2020-10-26 22:41:31,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:31,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249018628] [2020-10-26 22:41:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:31,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:31,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:32,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:32,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 22:41:32,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:41:32,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-26 22:41:32,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:32,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:41:32,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:41:32,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-26 22:41:32,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:32,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:32,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:32,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:32,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:32,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:32,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 22:41:32,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:41:32,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:32,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:32,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:33,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:33,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:41:33,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:33,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-26 22:41:33,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:33,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:33,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:33,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:41:33,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:41:33,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249018628] [2020-10-26 22:41:33,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:33,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:41:33,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350473758] [2020-10-26 22:41:33,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:33,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:33,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:33,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:33,164 INFO L87 Difference]: Start difference. First operand 1010 states and 1269 transitions. Second operand 7 states. [2020-10-26 22:41:37,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:37,290 INFO L93 Difference]: Finished difference Result 2467 states and 3484 transitions. [2020-10-26 22:41:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:41:37,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2020-10-26 22:41:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:37,306 INFO L225 Difference]: With dead ends: 2467 [2020-10-26 22:41:37,310 INFO L226 Difference]: Without dead ends: 1841 [2020-10-26 22:41:37,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:41:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2020-10-26 22:41:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1810. [2020-10-26 22:41:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1810 states. [2020-10-26 22:41:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2280 transitions. [2020-10-26 22:41:37,396 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2280 transitions. Word has length 163 [2020-10-26 22:41:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:37,398 INFO L481 AbstractCegarLoop]: Abstraction has 1810 states and 2280 transitions. [2020-10-26 22:41:37,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2280 transitions. [2020-10-26 22:41:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 22:41:37,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:37,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:37,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:41:37,407 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:37,407 INFO L82 PathProgramCache]: Analyzing trace with hash -26800662, now seen corresponding path program 1 times [2020-10-26 22:41:37,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:37,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520965698] [2020-10-26 22:41:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:37,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:37,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:37,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-26 22:41:37,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:37,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-26 22:41:37,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:37,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:37,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:41:37,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 22:41:37,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:37,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:37,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:37,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:37,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:37,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:37,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:41:37,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:37,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:37,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:37,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:37,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:38,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:38,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:38,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:38,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:41:38,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:38,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-26 22:41:38,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:41:38,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:41:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520965698] [2020-10-26 22:41:38,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:38,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:41:38,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843835105] [2020-10-26 22:41:38,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:41:38,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:38,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:41:38,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:41:38,253 INFO L87 Difference]: Start difference. First operand 1810 states and 2280 transitions. Second operand 5 states. [2020-10-26 22:41:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:40,826 INFO L93 Difference]: Finished difference Result 3265 states and 4342 transitions. [2020-10-26 22:41:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:41:40,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-10-26 22:41:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:40,848 INFO L225 Difference]: With dead ends: 3265 [2020-10-26 22:41:40,848 INFO L226 Difference]: Without dead ends: 2233 [2020-10-26 22:41:40,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:41:40,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2020-10-26 22:41:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2216. [2020-10-26 22:41:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2216 states. [2020-10-26 22:41:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 2860 transitions. [2020-10-26 22:41:40,930 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 2860 transitions. Word has length 178 [2020-10-26 22:41:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:40,930 INFO L481 AbstractCegarLoop]: Abstraction has 2216 states and 2860 transitions. [2020-10-26 22:41:40,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:41:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 2860 transitions. [2020-10-26 22:41:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 22:41:40,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:40,937 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:40,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:41:40,937 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash -157976718, now seen corresponding path program 1 times [2020-10-26 22:41:40,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:40,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709947016] [2020-10-26 22:41:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:41,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:41,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:42,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:42,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:42,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 22:41:42,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:41:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-10-26 22:41:42,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:41:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:41:42,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:43,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:43,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:43,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:43,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:43,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:41:43,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:43,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:43,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:43,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:43,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:43,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:43,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:43,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:41:43,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:43,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-26 22:41:43,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:41:43,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:43,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:41:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:43,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:43,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:43,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:41:43,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:43,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 22:41:43,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:43,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:43,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:43,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:41:43,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:41:43,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709947016] [2020-10-26 22:41:43,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:43,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:41:43,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649067046] [2020-10-26 22:41:43,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:43,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:43,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:43,668 INFO L87 Difference]: Start difference. First operand 2216 states and 2860 transitions. Second operand 7 states. [2020-10-26 22:41:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:47,284 INFO L93 Difference]: Finished difference Result 5068 states and 6786 transitions. [2020-10-26 22:41:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:41:47,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 237 [2020-10-26 22:41:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:47,307 INFO L225 Difference]: With dead ends: 5068 [2020-10-26 22:41:47,307 INFO L226 Difference]: Without dead ends: 3236 [2020-10-26 22:41:47,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:41:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2020-10-26 22:41:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3197. [2020-10-26 22:41:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-10-26 22:41:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 3998 transitions. [2020-10-26 22:41:47,421 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 3998 transitions. Word has length 237 [2020-10-26 22:41:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:47,422 INFO L481 AbstractCegarLoop]: Abstraction has 3197 states and 3998 transitions. [2020-10-26 22:41:47,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 3998 transitions. [2020-10-26 22:41:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-26 22:41:47,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:47,429 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:47,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:41:47,430 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash -764799354, now seen corresponding path program 1 times [2020-10-26 22:41:47,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:47,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797590571] [2020-10-26 22:41:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:47,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:48,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:48,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-26 22:41:48,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:41:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-26 22:41:48,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-26 22:41:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 22:41:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:48,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:48,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:48,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:48,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:48,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:48,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:41:48,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:48,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:48,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:48,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:48,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:48,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:48,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:48,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:48,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:41:48,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:48,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 22:41:48,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:48,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:48,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:48,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:41:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:48,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:48,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:48,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:41:48,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:48,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 22:41:48,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:41:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 22:41:48,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797590571] [2020-10-26 22:41:48,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:48,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:41:48,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517476798] [2020-10-26 22:41:48,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:41:48,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:48,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:41:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:41:48,658 INFO L87 Difference]: Start difference. First operand 3197 states and 3998 transitions. Second operand 5 states. [2020-10-26 22:41:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:51,583 INFO L93 Difference]: Finished difference Result 7009 states and 9062 transitions. [2020-10-26 22:41:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:41:51,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2020-10-26 22:41:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:51,612 INFO L225 Difference]: With dead ends: 7009 [2020-10-26 22:41:51,613 INFO L226 Difference]: Without dead ends: 4196 [2020-10-26 22:41:51,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:41:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2020-10-26 22:41:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3980. [2020-10-26 22:41:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3980 states. [2020-10-26 22:41:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 5006 transitions. [2020-10-26 22:41:51,731 INFO L78 Accepts]: Start accepts. Automaton has 3980 states and 5006 transitions. Word has length 247 [2020-10-26 22:41:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:51,732 INFO L481 AbstractCegarLoop]: Abstraction has 3980 states and 5006 transitions. [2020-10-26 22:41:51,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:41:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3980 states and 5006 transitions. [2020-10-26 22:41:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-26 22:41:51,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:51,738 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:51,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:41:51,739 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1579011979, now seen corresponding path program 1 times [2020-10-26 22:41:51,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:51,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794204574] [2020-10-26 22:41:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:51,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:51,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:53,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:53,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 22:41:53,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:41:53,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-26 22:41:53,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:53,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:53,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:41:53,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:41:53,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:53,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:53,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:53,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:53,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:53,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:53,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 22:41:53,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:53,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:53,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:53,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:53,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:53,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:41:53,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:53,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:41:53,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:53,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:53,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:53,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:41:53,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:41:53,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:41:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:54,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:54,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:54,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:41:54,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:54,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-26 22:41:54,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:41:54,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:41:54,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794204574] [2020-10-26 22:41:54,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:54,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:41:54,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103843153] [2020-10-26 22:41:54,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:54,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:54,250 INFO L87 Difference]: Start difference. First operand 3980 states and 5006 transitions. Second operand 7 states. [2020-10-26 22:41:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:57,657 INFO L93 Difference]: Finished difference Result 8621 states and 11136 transitions. [2020-10-26 22:41:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:41:57,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2020-10-26 22:41:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:57,690 INFO L225 Difference]: With dead ends: 8621 [2020-10-26 22:41:57,691 INFO L226 Difference]: Without dead ends: 5025 [2020-10-26 22:41:57,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:41:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2020-10-26 22:41:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4988. [2020-10-26 22:41:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4988 states. [2020-10-26 22:41:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 6282 transitions. [2020-10-26 22:41:57,843 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 6282 transitions. Word has length 248 [2020-10-26 22:41:57,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:57,844 INFO L481 AbstractCegarLoop]: Abstraction has 4988 states and 6282 transitions. [2020-10-26 22:41:57,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 6282 transitions. [2020-10-26 22:41:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 22:41:57,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:57,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:57,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:41:57,851 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1451636579, now seen corresponding path program 1 times [2020-10-26 22:41:57,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:57,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265963217] [2020-10-26 22:41:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:58,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:58,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:01,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:02,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:02,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 22:42:02,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:42:02,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-26 22:42:02,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:02,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:42:02,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:42:02,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-26 22:42:02,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:03,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:42:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:03,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:03,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:03,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:42:03,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:03,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 22:42:03,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:42:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:42:03,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:03,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:42:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:03,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:03,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:03,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:42:03,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:42:03,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-26 22:42:03,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:03,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:42:03,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 22:42:03,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:03,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:42:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:03,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:03,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:03,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:42:03,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:03,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 22:42:03,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:03,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:03,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 22:42:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:42:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 78 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:42:04,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265963217] [2020-10-26 22:42:04,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:42:04,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:42:04,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431504] [2020-10-26 22:42:04,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:42:04,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:42:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:42:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:42:04,032 INFO L87 Difference]: Start difference. First operand 4988 states and 6282 transitions. Second operand 7 states. [2020-10-26 22:42:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:42:07,121 INFO L93 Difference]: Finished difference Result 9618 states and 12196 transitions. [2020-10-26 22:42:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:42:07,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 258 [2020-10-26 22:42:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:42:07,146 INFO L225 Difference]: With dead ends: 9618 [2020-10-26 22:42:07,146 INFO L226 Difference]: Without dead ends: 5014 [2020-10-26 22:42:07,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:42:07,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2020-10-26 22:42:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 4984. [2020-10-26 22:42:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4984 states. [2020-10-26 22:42:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4984 states to 4984 states and 5976 transitions. [2020-10-26 22:42:07,266 INFO L78 Accepts]: Start accepts. Automaton has 4984 states and 5976 transitions. Word has length 258 [2020-10-26 22:42:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:42:07,267 INFO L481 AbstractCegarLoop]: Abstraction has 4984 states and 5976 transitions. [2020-10-26 22:42:07,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:42:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4984 states and 5976 transitions. [2020-10-26 22:42:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-26 22:42:07,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:42:07,274 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:42:07,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:42:07,275 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:42:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:42:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1791464198, now seen corresponding path program 1 times [2020-10-26 22:42:07,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:42:07,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073100342] [2020-10-26 22:42:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:42:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:07,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:07,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:08,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:08,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 22:42:08,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:42:08,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-26 22:42:08,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-26 22:42:08,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 22:42:08,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:08,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:42:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:08,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:08,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:08,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:42:08,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:42:08,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:08,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:08,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:42:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:08,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:08,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:08,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:42:08,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:08,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 22:42:08,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:08,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:08,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:08,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:42:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:08,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:08,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:08,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:42:08,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 22:42:08,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:42:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:42:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-26 22:42:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073100342] [2020-10-26 22:42:08,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:42:08,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:42:08,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323119716] [2020-10-26 22:42:08,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:42:08,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:42:08,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:42:08,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:42:08,687 INFO L87 Difference]: Start difference. First operand 4984 states and 5976 transitions. Second operand 5 states. [2020-10-26 22:42:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:42:13,793 INFO L93 Difference]: Finished difference Result 9801 states and 11797 transitions. [2020-10-26 22:42:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:42:13,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 274 [2020-10-26 22:42:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:42:13,814 INFO L225 Difference]: With dead ends: 9801 [2020-10-26 22:42:13,815 INFO L226 Difference]: Without dead ends: 5011 [2020-10-26 22:42:13,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:42:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2020-10-26 22:42:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4980. [2020-10-26 22:42:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4980 states. [2020-10-26 22:42:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 5778 transitions. [2020-10-26 22:42:13,947 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 5778 transitions. Word has length 274 [2020-10-26 22:42:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:42:13,947 INFO L481 AbstractCegarLoop]: Abstraction has 4980 states and 5778 transitions. [2020-10-26 22:42:13,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:42:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 5778 transitions. [2020-10-26 22:42:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-26 22:42:13,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:42:13,960 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:42:13,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:42:13,961 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:42:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:42:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1086253643, now seen corresponding path program 1 times [2020-10-26 22:42:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:42:13,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664123283] [2020-10-26 22:42:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:42:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:14,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:14,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:16,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:16,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 350 [2020-10-26 22:42:16,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:42:16,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2908 [2020-10-26 22:42:16,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-26 22:42:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:42:16,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:17,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:42:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:17,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:17,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:17,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:42:17,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:17,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:42:17,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:17,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:17,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:17,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:17,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:42:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:17,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:17,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:17,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:42:17,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:17,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 22:42:17,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:17,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:17,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:42:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:17,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:17,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:42:17,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:17,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 22:42:17,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:17,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:42:17,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:17,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:42:17,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:17,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 22:42:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:17,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:17,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:17,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:42:17,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:42:17,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 22:42:17,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:17,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:17,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:42:17,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 22:42:17,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-26 22:42:17,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664123283] [2020-10-26 22:42:17,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:42:17,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:42:17,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467953909] [2020-10-26 22:42:17,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:42:17,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:42:17,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:42:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:42:17,848 INFO L87 Difference]: Start difference. First operand 4980 states and 5778 transitions. Second operand 6 states. [2020-10-26 22:42:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:42:20,652 INFO L93 Difference]: Finished difference Result 8647 states and 10069 transitions. [2020-10-26 22:42:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:42:20,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-10-26 22:42:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:42:20,667 INFO L225 Difference]: With dead ends: 8647 [2020-10-26 22:42:20,667 INFO L226 Difference]: Without dead ends: 5012 [2020-10-26 22:42:20,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:42:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2020-10-26 22:42:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4978. [2020-10-26 22:42:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4978 states. [2020-10-26 22:42:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 5759 transitions. [2020-10-26 22:42:20,774 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 5759 transitions. Word has length 334 [2020-10-26 22:42:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:42:20,775 INFO L481 AbstractCegarLoop]: Abstraction has 4978 states and 5759 transitions. [2020-10-26 22:42:20,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:42:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 5759 transitions. [2020-10-26 22:42:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-26 22:42:20,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:42:20,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:42:20,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:42:20,787 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:42:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:42:20,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1294226187, now seen corresponding path program 1 times [2020-10-26 22:42:20,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:42:20,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146233825] [2020-10-26 22:42:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:42:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:20,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:21,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:21,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:25,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:25,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 350 [2020-10-26 22:42:25,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:42:25,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4350 [2020-10-26 22:42:25,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:25,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:25,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-26 22:42:25,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:42:25,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:25,358 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:42:25,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:42:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:25,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:25,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:42:25,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:25,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:42:25,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:25,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:25,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:42:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:25,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:25,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:25,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:42:25,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:25,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 22:42:25,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:42:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:25,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 22:42:25,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:25,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:42:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:25,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:25,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:25,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:42:25,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:25,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:42:25,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:42:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:42:25,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:25,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 22:42:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:25,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:25,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:25,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:42:25,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:25,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 22:42:25,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:25,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:25,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:42:25,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:25,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 192 proven. 73 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 22:42:25,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146233825] [2020-10-26 22:42:25,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:42:25,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:42:25,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501690161] [2020-10-26 22:42:25,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:42:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:42:25,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:42:25,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:42:25,870 INFO L87 Difference]: Start difference. First operand 4978 states and 5759 transitions. Second operand 7 states. [2020-10-26 22:42:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:42:29,216 INFO L93 Difference]: Finished difference Result 12119 states and 14207 transitions. [2020-10-26 22:42:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:42:29,217 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 334 [2020-10-26 22:42:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:42:29,238 INFO L225 Difference]: With dead ends: 12119 [2020-10-26 22:42:29,239 INFO L226 Difference]: Without dead ends: 7525 [2020-10-26 22:42:29,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:42:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7525 states. [2020-10-26 22:42:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7525 to 7288. [2020-10-26 22:42:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7288 states. [2020-10-26 22:42:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7288 states to 7288 states and 8452 transitions. [2020-10-26 22:42:29,409 INFO L78 Accepts]: Start accepts. Automaton has 7288 states and 8452 transitions. Word has length 334 [2020-10-26 22:42:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:42:29,410 INFO L481 AbstractCegarLoop]: Abstraction has 7288 states and 8452 transitions. [2020-10-26 22:42:29,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:42:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7288 states and 8452 transitions. [2020-10-26 22:42:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-26 22:42:29,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:42:29,426 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:42:29,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 22:42:29,426 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:42:29,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:42:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash -325044088, now seen corresponding path program 1 times [2020-10-26 22:42:29,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:42:29,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171562841] [2020-10-26 22:42:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:42:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:29,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:29,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:29,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:33,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:33,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 355 [2020-10-26 22:42:33,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:42:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4259 [2020-10-26 22:42:33,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:42:33,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:42:33,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:33,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:42:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:33,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:33,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:33,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:42:33,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:42:33,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:42:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:34,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:34,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:42:34,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 22:42:34,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:42:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:42:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:34,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:42:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:34,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:34,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:34,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:42:34,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:34,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 22:42:34,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:42:34,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:42:34,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:34,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-26 22:42:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:34,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:34,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:34,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:42:34,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:34,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:42:34,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:34,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:34,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:42:34,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:34,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 192 proven. 73 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 22:42:34,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171562841] [2020-10-26 22:42:34,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:42:34,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:42:34,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44211845] [2020-10-26 22:42:34,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:42:34,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:42:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:42:34,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:42:34,349 INFO L87 Difference]: Start difference. First operand 7288 states and 8452 transitions. Second operand 7 states. [2020-10-26 22:42:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:42:39,465 INFO L93 Difference]: Finished difference Result 16978 states and 19881 transitions. [2020-10-26 22:42:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:42:39,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 339 [2020-10-26 22:42:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:42:39,513 INFO L225 Difference]: With dead ends: 16978 [2020-10-26 22:42:39,514 INFO L226 Difference]: Without dead ends: 10074 [2020-10-26 22:42:39,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:42:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10074 states. [2020-10-26 22:42:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10074 to 9632. [2020-10-26 22:42:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9632 states. [2020-10-26 22:42:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 11074 transitions. [2020-10-26 22:42:39,817 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 11074 transitions. Word has length 339 [2020-10-26 22:42:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:42:39,817 INFO L481 AbstractCegarLoop]: Abstraction has 9632 states and 11074 transitions. [2020-10-26 22:42:39,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:42:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 11074 transitions. [2020-10-26 22:42:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-26 22:42:39,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:42:39,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:42:39,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 22:42:39,835 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:42:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:42:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash -900687149, now seen corresponding path program 1 times [2020-10-26 22:42:39,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:42:39,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416785187] [2020-10-26 22:42:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:42:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:40,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:40,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:41,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:44,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:44,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 371 [2020-10-26 22:42:44,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:42:44,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4756 [2020-10-26 22:42:44,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:42:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:42:44,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:44,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:42:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:44,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:44,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:44,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:42:44,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:44,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:42:44,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:44,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:44,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:44,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:44,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:44,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:42:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:44,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:44,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:44,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:42:44,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:44,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 22:42:44,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:44,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:42:44,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:44,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:42:44,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:44,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:42:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:45,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:42:45,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:45,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-10-26 22:42:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:45,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:45,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:45,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:42:45,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:45,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 22:42:45,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:42:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:45,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 192 proven. 73 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 22:42:45,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416785187] [2020-10-26 22:42:45,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:42:45,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:42:45,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433324948] [2020-10-26 22:42:45,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:42:45,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:42:45,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:42:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:42:45,278 INFO L87 Difference]: Start difference. First operand 9632 states and 11074 transitions. Second operand 7 states. [2020-10-26 22:42:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:42:49,115 INFO L93 Difference]: Finished difference Result 19719 states and 22881 transitions. [2020-10-26 22:42:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:42:49,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 355 [2020-10-26 22:42:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:42:49,145 INFO L225 Difference]: With dead ends: 19719 [2020-10-26 22:42:49,145 INFO L226 Difference]: Without dead ends: 10471 [2020-10-26 22:42:49,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:42:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2020-10-26 22:42:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 10408. [2020-10-26 22:42:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10408 states. [2020-10-26 22:42:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10408 states to 10408 states and 11967 transitions. [2020-10-26 22:42:49,347 INFO L78 Accepts]: Start accepts. Automaton has 10408 states and 11967 transitions. Word has length 355 [2020-10-26 22:42:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:42:49,347 INFO L481 AbstractCegarLoop]: Abstraction has 10408 states and 11967 transitions. [2020-10-26 22:42:49,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:42:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 10408 states and 11967 transitions. [2020-10-26 22:42:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-26 22:42:49,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:42:49,365 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:42:49,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 22:42:49,365 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:42:49,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:42:49,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1336433857, now seen corresponding path program 1 times [2020-10-26 22:42:49,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:42:49,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571073644] [2020-10-26 22:42:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:42:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:49,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:49,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:50,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:51,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:51,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 377 [2020-10-26 22:42:51,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:42:51,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1962 [2020-10-26 22:42:51,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:51,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:51,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-26 22:42:51,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:42:51,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:51,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:42:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:51,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:51,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:51,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:42:51,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:51,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:42:51,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:51,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:51,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:51,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:51,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:51,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:42:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:51,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:51,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:51,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:42:51,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 22:42:51,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:51,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:51,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:42:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:51,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:51,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:51,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:42:51,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:51,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 22:42:51,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:51,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:42:51,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:51,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:42:51,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:51,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-10-26 22:42:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:51,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:51,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:51,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:42:51,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 22:42:51,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:42:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:42:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 22:42:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 22:42:51,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571073644] [2020-10-26 22:42:51,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:42:51,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:42:51,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323969794] [2020-10-26 22:42:51,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:42:51,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:42:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:42:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:42:51,904 INFO L87 Difference]: Start difference. First operand 10408 states and 11967 transitions. Second operand 7 states. [2020-10-26 22:42:52,635 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:42:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:42:56,716 INFO L93 Difference]: Finished difference Result 21009 states and 24331 transitions. [2020-10-26 22:42:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:42:56,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 361 [2020-10-26 22:42:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:42:56,745 INFO L225 Difference]: With dead ends: 21009 [2020-10-26 22:42:56,745 INFO L226 Difference]: Without dead ends: 11561 [2020-10-26 22:42:56,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:42:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11561 states. [2020-10-26 22:42:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11561 to 10938. [2020-10-26 22:42:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10938 states. [2020-10-26 22:42:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10938 states to 10938 states and 12487 transitions. [2020-10-26 22:42:56,945 INFO L78 Accepts]: Start accepts. Automaton has 10938 states and 12487 transitions. Word has length 361 [2020-10-26 22:42:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:42:56,946 INFO L481 AbstractCegarLoop]: Abstraction has 10938 states and 12487 transitions. [2020-10-26 22:42:56,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:42:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 10938 states and 12487 transitions. [2020-10-26 22:42:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-10-26 22:42:56,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:42:56,958 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:42:56,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 22:42:56,958 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:42:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:42:56,959 INFO L82 PathProgramCache]: Analyzing trace with hash 781526620, now seen corresponding path program 1 times [2020-10-26 22:42:56,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:42:56,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618535604] [2020-10-26 22:42:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:42:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:57,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:57,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:57,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:57,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-26 22:42:57,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:42:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-26 22:42:57,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:42:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:42:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 22:42:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:58,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:42:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:58,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:58,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:58,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:42:58,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:42:58,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:42:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:42:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:42:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:58,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:58,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:42:58,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:58,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 22:42:58,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:58,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:42:58,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:42:58,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:42:58,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:58,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:42:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:42:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:42:58,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:42:58,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:42:58,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:42:58,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 22:42:58,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:42:58,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:42:58,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:42:58,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 22:42:58,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:42:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 208 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:42:58,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618535604] [2020-10-26 22:42:58,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:42:58,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:42:58,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790398061] [2020-10-26 22:42:58,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:42:58,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:42:58,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:42:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:42:58,778 INFO L87 Difference]: Start difference. First operand 10938 states and 12487 transitions. Second operand 8 states. [2020-10-26 22:43:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:43:02,361 INFO L93 Difference]: Finished difference Result 23080 states and 26421 transitions. [2020-10-26 22:43:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:43:02,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 360 [2020-10-26 22:43:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:43:02,395 INFO L225 Difference]: With dead ends: 23080 [2020-10-26 22:43:02,395 INFO L226 Difference]: Without dead ends: 12507 [2020-10-26 22:43:02,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:43:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12507 states. [2020-10-26 22:43:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12507 to 12253. [2020-10-26 22:43:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12253 states. [2020-10-26 22:43:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12253 states to 12253 states and 13980 transitions. [2020-10-26 22:43:02,624 INFO L78 Accepts]: Start accepts. Automaton has 12253 states and 13980 transitions. Word has length 360 [2020-10-26 22:43:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:43:02,625 INFO L481 AbstractCegarLoop]: Abstraction has 12253 states and 13980 transitions. [2020-10-26 22:43:02,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:43:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 12253 states and 13980 transitions. [2020-10-26 22:43:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-26 22:43:02,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:43:02,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:43:02,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 22:43:02,639 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:43:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:43:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1600654109, now seen corresponding path program 1 times [2020-10-26 22:43:02,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:43:02,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550993844] [2020-10-26 22:43:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:43:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:02,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:03,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:04,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:07,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:07,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 389 [2020-10-26 22:43:07,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:43:07,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 22:43:07,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:07,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:07,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:43:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:43:07,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:07,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:43:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:07,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:43:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:08,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:08,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:08,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:43:08,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:08,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 22:43:08,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:08,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:43:08,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:08,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:43:08,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:08,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:43:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:08,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:08,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:08,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 22:43:08,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-26 22:43:08,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:08,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:43:08,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-26 22:43:08,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:08,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-26 22:43:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:08,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:08,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:08,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:43:08,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:08,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 22:43:08,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:08,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:08,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:43:08,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:08,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 226 proven. 86 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 22:43:08,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550993844] [2020-10-26 22:43:08,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:43:08,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:43:08,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421004263] [2020-10-26 22:43:08,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:43:08,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:43:08,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:43:08,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:43:08,451 INFO L87 Difference]: Start difference. First operand 12253 states and 13980 transitions. Second operand 7 states. [2020-10-26 22:43:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:43:12,663 INFO L93 Difference]: Finished difference Result 26619 states and 30601 transitions. [2020-10-26 22:43:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:43:12,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 373 [2020-10-26 22:43:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:43:12,699 INFO L225 Difference]: With dead ends: 26619 [2020-10-26 22:43:12,700 INFO L226 Difference]: Without dead ends: 14749 [2020-10-26 22:43:12,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:43:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14749 states. [2020-10-26 22:43:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14749 to 14131. [2020-10-26 22:43:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14131 states. [2020-10-26 22:43:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14131 states to 14131 states and 15781 transitions. [2020-10-26 22:43:12,977 INFO L78 Accepts]: Start accepts. Automaton has 14131 states and 15781 transitions. Word has length 373 [2020-10-26 22:43:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:43:12,977 INFO L481 AbstractCegarLoop]: Abstraction has 14131 states and 15781 transitions. [2020-10-26 22:43:12,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:43:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 14131 states and 15781 transitions. [2020-10-26 22:43:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-10-26 22:43:12,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:43:12,996 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:43:12,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 22:43:12,996 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:43:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:43:12,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1515877612, now seen corresponding path program 1 times [2020-10-26 22:43:12,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:43:12,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361227712] [2020-10-26 22:43:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:43:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:13,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:13,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:14,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:18,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:18,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 440 [2020-10-26 22:43:18,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:43:18,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 22:43:18,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:18,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:18,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:43:18,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-26 22:43:18,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:18,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:43:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:18,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:18,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:18,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:43:18,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:18,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:43:18,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:18,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:18,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:43:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:18,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:18,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:18,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:43:18,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:18,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:43:18,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:43:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:43:18,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:18,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:43:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:18,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:18,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:18,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 22:43:18,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:18,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-26 22:43:18,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:18,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:18,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:43:18,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:43:18,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:18,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-10-26 22:43:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:18,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:18,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:18,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:43:18,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 22:43:18,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:43:18,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:18,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 261 proven. 86 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 22:43:18,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361227712] [2020-10-26 22:43:18,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:43:18,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:43:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597113379] [2020-10-26 22:43:18,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:43:18,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:43:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:43:18,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:43:18,904 INFO L87 Difference]: Start difference. First operand 14131 states and 15781 transitions. Second operand 7 states. [2020-10-26 22:43:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:43:23,283 INFO L93 Difference]: Finished difference Result 27923 states and 31203 transitions. [2020-10-26 22:43:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:43:23,284 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 424 [2020-10-26 22:43:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:43:23,313 INFO L225 Difference]: With dead ends: 27923 [2020-10-26 22:43:23,313 INFO L226 Difference]: Without dead ends: 14176 [2020-10-26 22:43:23,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:43:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2020-10-26 22:43:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 14133. [2020-10-26 22:43:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14133 states. [2020-10-26 22:43:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14133 states to 14133 states and 15731 transitions. [2020-10-26 22:43:23,590 INFO L78 Accepts]: Start accepts. Automaton has 14133 states and 15731 transitions. Word has length 424 [2020-10-26 22:43:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:43:23,591 INFO L481 AbstractCegarLoop]: Abstraction has 14133 states and 15731 transitions. [2020-10-26 22:43:23,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:43:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 14133 states and 15731 transitions. [2020-10-26 22:43:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-10-26 22:43:23,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:43:23,611 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:43:23,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 22:43:23,612 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:43:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:43:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash 535658708, now seen corresponding path program 1 times [2020-10-26 22:43:23,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:43:23,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710368124] [2020-10-26 22:43:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:43:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:23,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:23,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:24,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:24,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:28,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:28,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-10-26 22:43:28,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:43:28,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 22:43:28,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:28,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:28,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:43:28,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:43:28,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:28,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:43:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:28,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:28,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:28,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:43:28,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:43:28,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:28,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:43:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:28,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:28,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:28,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:43:28,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:28,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 22:43:28,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:28,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:28,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:43:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:29,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:29,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:29,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:43:29,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:29,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 22:43:29,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:29,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:43:29,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:43:29,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:29,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:43:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:29,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:29,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:29,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:43:29,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:29,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 22:43:29,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:43:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:43:29,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:29,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 325 [2020-10-26 22:43:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:29,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:29,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:43:29,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:29,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 22:43:29,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:29,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:29,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:43:29,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:29,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 303 proven. 69 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2020-10-26 22:43:29,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710368124] [2020-10-26 22:43:29,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:43:29,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:43:29,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208455504] [2020-10-26 22:43:29,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:43:29,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:43:29,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:43:29,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:43:29,464 INFO L87 Difference]: Start difference. First operand 14133 states and 15731 transitions. Second operand 7 states. [2020-10-26 22:43:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:43:33,041 INFO L93 Difference]: Finished difference Result 26962 states and 30167 transitions. [2020-10-26 22:43:33,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:43:33,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 451 [2020-10-26 22:43:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:43:33,076 INFO L225 Difference]: With dead ends: 26962 [2020-10-26 22:43:33,076 INFO L226 Difference]: Without dead ends: 15527 [2020-10-26 22:43:33,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:43:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15527 states. [2020-10-26 22:43:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15527 to 15471. [2020-10-26 22:43:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15471 states. [2020-10-26 22:43:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15471 states to 15471 states and 17161 transitions. [2020-10-26 22:43:33,362 INFO L78 Accepts]: Start accepts. Automaton has 15471 states and 17161 transitions. Word has length 451 [2020-10-26 22:43:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:43:33,363 INFO L481 AbstractCegarLoop]: Abstraction has 15471 states and 17161 transitions. [2020-10-26 22:43:33,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:43:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 15471 states and 17161 transitions. [2020-10-26 22:43:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-10-26 22:43:33,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:43:33,382 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:43:33,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 22:43:33,382 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:43:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:43:33,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1355843163, now seen corresponding path program 1 times [2020-10-26 22:43:33,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:43:33,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447183314] [2020-10-26 22:43:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:43:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:33,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:33,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 478 [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3165 [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 340 [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-26 22:43:36,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:36,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:43:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:36,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:36,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:36,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:43:36,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 22:43:36,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:36,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:36,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:43:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:36,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:36,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:36,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-26 22:43:36,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:36,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 22:43:36,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:36,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:36,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:36,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:36,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-10-26 22:43:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:36,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:37,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:37,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 22:43:37,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:37,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 22:43:37,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:37,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:43:37,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:37,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-26 22:43:37,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:37,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-10-26 22:43:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:37,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:37,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:37,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:37,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 22:43:37,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:43:37,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-26 22:43:37,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:37,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:37,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:43:37,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 22:43:37,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 248 proven. 40 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-26 22:43:37,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447183314] [2020-10-26 22:43:37,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:43:37,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:43:37,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474577235] [2020-10-26 22:43:37,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:43:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:43:37,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:43:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:43:37,393 INFO L87 Difference]: Start difference. First operand 15471 states and 17161 transitions. Second operand 6 states. [2020-10-26 22:43:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:43:40,126 INFO L93 Difference]: Finished difference Result 17036 states and 18889 transitions. [2020-10-26 22:43:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:43:40,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 462 [2020-10-26 22:43:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:43:40,158 INFO L225 Difference]: With dead ends: 17036 [2020-10-26 22:43:40,158 INFO L226 Difference]: Without dead ends: 17033 [2020-10-26 22:43:40,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:43:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17033 states. [2020-10-26 22:43:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17033 to 15849. [2020-10-26 22:43:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15849 states. [2020-10-26 22:43:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15849 states to 15849 states and 17594 transitions. [2020-10-26 22:43:40,432 INFO L78 Accepts]: Start accepts. Automaton has 15849 states and 17594 transitions. Word has length 462 [2020-10-26 22:43:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:43:40,433 INFO L481 AbstractCegarLoop]: Abstraction has 15849 states and 17594 transitions. [2020-10-26 22:43:40,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:43:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 15849 states and 17594 transitions. [2020-10-26 22:43:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-10-26 22:43:40,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:43:40,458 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:43:40,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 22:43:40,458 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:43:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:43:40,459 INFO L82 PathProgramCache]: Analyzing trace with hash -134252978, now seen corresponding path program 1 times [2020-10-26 22:43:40,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:43:40,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421111868] [2020-10-26 22:43:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:43:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:40,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:40,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:42,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:45,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:45,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 545 [2020-10-26 22:43:45,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:43:45,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4832 [2020-10-26 22:43:45,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 217 [2020-10-26 22:43:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:43:45,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:43:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:45,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:45,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:43:45,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:43:45,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:45,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:45,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:43:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:45,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:45,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:45,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:43:45,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:45,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 22:43:45,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:45,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:45,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:45,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:45,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:43:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:45,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:45,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:45,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:43:45,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 22:43:45,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:43:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:45,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 22:43:45,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:45,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-26 22:43:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:45,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:45,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:45,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:43:45,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:43:45,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:43:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:43:45,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:46,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-10-26 22:43:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:46,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:46,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:46,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:43:46,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:46,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-26 22:43:46,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:43:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:46,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 361 proven. 108 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-26 22:43:46,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421111868] [2020-10-26 22:43:46,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:43:46,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:43:46,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094120540] [2020-10-26 22:43:46,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:43:46,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:43:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:43:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:43:46,714 INFO L87 Difference]: Start difference. First operand 15849 states and 17594 transitions. Second operand 7 states. [2020-10-26 22:43:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:43:49,659 INFO L93 Difference]: Finished difference Result 30412 states and 33709 transitions. [2020-10-26 22:43:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:43:49,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 527 [2020-10-26 22:43:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:43:49,688 INFO L225 Difference]: With dead ends: 30412 [2020-10-26 22:43:49,688 INFO L226 Difference]: Without dead ends: 16487 [2020-10-26 22:43:49,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:43:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16487 states. [2020-10-26 22:43:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16487 to 15663. [2020-10-26 22:43:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15663 states. [2020-10-26 22:43:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15663 states to 15663 states and 17231 transitions. [2020-10-26 22:43:49,973 INFO L78 Accepts]: Start accepts. Automaton has 15663 states and 17231 transitions. Word has length 527 [2020-10-26 22:43:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:43:49,974 INFO L481 AbstractCegarLoop]: Abstraction has 15663 states and 17231 transitions. [2020-10-26 22:43:49,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:43:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 15663 states and 17231 transitions. [2020-10-26 22:43:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2020-10-26 22:43:49,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:43:49,992 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:43:49,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 22:43:49,993 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:43:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:43:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash -571853270, now seen corresponding path program 1 times [2020-10-26 22:43:49,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:43:49,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528355316] [2020-10-26 22:43:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:43:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:50,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:50,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:55,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:55,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 567 [2020-10-26 22:43:55,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:43:55,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 22:43:55,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-26 22:43:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:43:55,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:55,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:43:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:55,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:55,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:55,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:43:55,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:55,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:43:55,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:55,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:55,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:55,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:55,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:55,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:43:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:55,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:55,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:55,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:43:55,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 22:43:55,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:55,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:55,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:43:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:55,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:55,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:55,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:43:55,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-26 22:43:55,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:43:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:43:55,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:43:55,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:55,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-10-26 22:43:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:55,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:55,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:55,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:43:55,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:55,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 22:43:55,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:43:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:43:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:43:55,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:56,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-10-26 22:43:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:43:56,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:43:56,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:43:56,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:43:56,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:43:56,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 22:43:56,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:43:56,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:43:56,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:43:56,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:43:56,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:43:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 373 proven. 108 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-10-26 22:43:56,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528355316] [2020-10-26 22:43:56,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:43:56,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:43:56,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096489166] [2020-10-26 22:43:56,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:43:56,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:43:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:43:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:43:56,708 INFO L87 Difference]: Start difference. First operand 15663 states and 17231 transitions. Second operand 7 states. [2020-10-26 22:44:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:44:00,096 INFO L93 Difference]: Finished difference Result 28886 states and 31805 transitions. [2020-10-26 22:44:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:44:00,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 549 [2020-10-26 22:44:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:44:00,124 INFO L225 Difference]: With dead ends: 28886 [2020-10-26 22:44:00,124 INFO L226 Difference]: Without dead ends: 15735 [2020-10-26 22:44:00,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:44:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2020-10-26 22:44:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 15661. [2020-10-26 22:44:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15661 states. [2020-10-26 22:44:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15661 states to 15661 states and 17174 transitions. [2020-10-26 22:44:00,404 INFO L78 Accepts]: Start accepts. Automaton has 15661 states and 17174 transitions. Word has length 549 [2020-10-26 22:44:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:44:00,404 INFO L481 AbstractCegarLoop]: Abstraction has 15661 states and 17174 transitions. [2020-10-26 22:44:00,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:44:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 15661 states and 17174 transitions. [2020-10-26 22:44:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2020-10-26 22:44:00,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:44:00,418 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:44:00,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 22:44:00,418 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:44:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:44:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash 761796610, now seen corresponding path program 1 times [2020-10-26 22:44:00,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:44:00,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934141582] [2020-10-26 22:44:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:44:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:00,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:00,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:05,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:05,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 583 [2020-10-26 22:44:05,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:44:05,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4685 [2020-10-26 22:44:05,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:05,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:44:05,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 255 [2020-10-26 22:44:05,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:44:05,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:05,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:44:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:05,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:05,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:44:05,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:44:05,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:05,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:05,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:05,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:05,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:05,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:44:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:05,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:05,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:44:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:05,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:05,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:05,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:44:05,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:05,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 22:44:05,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:44:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 22:44:05,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:05,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-10-26 22:44:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:05,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:05,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:05,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:44:05,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:05,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-26 22:44:05,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:44:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:44:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:44:05,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:05,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-10-26 22:44:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:05,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:05,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:44:05,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:05,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 22:44:05,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:44:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:05,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 344 proven. 108 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2020-10-26 22:44:06,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934141582] [2020-10-26 22:44:06,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:44:06,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:44:06,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537043772] [2020-10-26 22:44:06,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:44:06,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:44:06,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:44:06,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:44:06,175 INFO L87 Difference]: Start difference. First operand 15661 states and 17174 transitions. Second operand 7 states. [2020-10-26 22:44:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:44:12,474 INFO L93 Difference]: Finished difference Result 31358 states and 34298 transitions. [2020-10-26 22:44:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:44:12,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 565 [2020-10-26 22:44:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:44:12,500 INFO L225 Difference]: With dead ends: 31358 [2020-10-26 22:44:12,501 INFO L226 Difference]: Without dead ends: 18209 [2020-10-26 22:44:12,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:44:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18209 states. [2020-10-26 22:44:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18209 to 15847. [2020-10-26 22:44:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15847 states. [2020-10-26 22:44:12,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15847 states to 15847 states and 17340 transitions. [2020-10-26 22:44:12,810 INFO L78 Accepts]: Start accepts. Automaton has 15847 states and 17340 transitions. Word has length 565 [2020-10-26 22:44:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:44:12,810 INFO L481 AbstractCegarLoop]: Abstraction has 15847 states and 17340 transitions. [2020-10-26 22:44:12,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:44:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 15847 states and 17340 transitions. [2020-10-26 22:44:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2020-10-26 22:44:12,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:44:12,948 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:44:12,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 22:44:12,948 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:44:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:44:12,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1947089410, now seen corresponding path program 1 times [2020-10-26 22:44:12,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:44:12,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253779391] [2020-10-26 22:44:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:44:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:13,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:13,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:14,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:16,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:16,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 587 [2020-10-26 22:44:16,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:44:16,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3802 [2020-10-26 22:44:16,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:44:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:44:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:44:16,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:16,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:44:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:16,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:16,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:44:16,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:16,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:44:16,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:16,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:16,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:16,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:16,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:17,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:44:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:17,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:17,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:17,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:44:17,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 22:44:17,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:17,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:44:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:17,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:44:17,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:17,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:44:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:17,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:17,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:44:17,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:17,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 22:44:17,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:44:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:44:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:44:17,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:17,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-10-26 22:44:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:17,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:17,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:17,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:44:17,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:17,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 22:44:17,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:44:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:17,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 381 proven. 108 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2020-10-26 22:44:17,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253779391] [2020-10-26 22:44:17,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:44:17,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:44:17,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972926015] [2020-10-26 22:44:17,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:44:17,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:44:17,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:44:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:44:17,804 INFO L87 Difference]: Start difference. First operand 15847 states and 17340 transitions. Second operand 7 states. [2020-10-26 22:44:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:44:21,409 INFO L93 Difference]: Finished difference Result 29838 states and 32782 transitions. [2020-10-26 22:44:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:44:21,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 569 [2020-10-26 22:44:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:44:21,446 INFO L225 Difference]: With dead ends: 29838 [2020-10-26 22:44:21,446 INFO L226 Difference]: Without dead ends: 17073 [2020-10-26 22:44:21,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:44:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17073 states. [2020-10-26 22:44:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17073 to 16247. [2020-10-26 22:44:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16247 states. [2020-10-26 22:44:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16247 states to 16247 states and 17819 transitions. [2020-10-26 22:44:21,734 INFO L78 Accepts]: Start accepts. Automaton has 16247 states and 17819 transitions. Word has length 569 [2020-10-26 22:44:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:44:21,735 INFO L481 AbstractCegarLoop]: Abstraction has 16247 states and 17819 transitions. [2020-10-26 22:44:21,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:44:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 16247 states and 17819 transitions. [2020-10-26 22:44:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2020-10-26 22:44:21,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:44:21,761 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:44:21,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 22:44:21,761 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:44:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:44:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1659954196, now seen corresponding path program 1 times [2020-10-26 22:44:21,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:44:21,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490774389] [2020-10-26 22:44:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:44:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:22,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:22,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:23,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:26,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:26,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 666 [2020-10-26 22:44:26,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:44:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4458 [2020-10-26 22:44:26,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:44:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 338 [2020-10-26 22:44:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:44:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:26,579 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:44:26,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:44:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:26,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:26,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:26,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:44:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:26,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:26,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:26,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:44:26,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:26,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 22:44:26,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:26,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:26,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:26,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:26,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:26,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:44:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:26,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:26,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:26,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 22:44:26,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:26,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 22:44:26,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:44:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-26 22:44:26,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:26,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-10-26 22:44:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:26,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:27,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:27,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:44:27,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:27,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 22:44:27,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:44:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:44:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:44:27,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:27,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 443 [2020-10-26 22:44:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:27,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:27,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:27,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:44:27,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 22:44:27,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:44:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:27,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 959 backedges. 381 proven. 108 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2020-10-26 22:44:27,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490774389] [2020-10-26 22:44:27,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:44:27,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:44:27,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558845621] [2020-10-26 22:44:27,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:44:27,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:44:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:44:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:44:27,530 INFO L87 Difference]: Start difference. First operand 16247 states and 17819 transitions. Second operand 8 states. [2020-10-26 22:44:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:44:32,040 INFO L93 Difference]: Finished difference Result 33131 states and 36501 transitions. [2020-10-26 22:44:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:44:32,041 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 648 [2020-10-26 22:44:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:44:32,068 INFO L225 Difference]: With dead ends: 33131 [2020-10-26 22:44:32,068 INFO L226 Difference]: Without dead ends: 17268 [2020-10-26 22:44:32,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-26 22:44:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17268 states. [2020-10-26 22:44:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17268 to 16255. [2020-10-26 22:44:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16255 states. [2020-10-26 22:44:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16255 states to 16255 states and 17812 transitions. [2020-10-26 22:44:32,324 INFO L78 Accepts]: Start accepts. Automaton has 16255 states and 17812 transitions. Word has length 648 [2020-10-26 22:44:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:44:32,325 INFO L481 AbstractCegarLoop]: Abstraction has 16255 states and 17812 transitions. [2020-10-26 22:44:32,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:44:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 16255 states and 17812 transitions. [2020-10-26 22:44:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2020-10-26 22:44:32,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:44:32,347 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:44:32,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 22:44:32,347 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:44:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:44:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash -665011835, now seen corresponding path program 1 times [2020-10-26 22:44:32,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:44:32,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883722672] [2020-10-26 22:44:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:44:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:32,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:33,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:34,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:34,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 670 [2020-10-26 22:44:34,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:44:34,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-26 22:44:34,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:34,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:44:34,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 453 [2020-10-26 22:44:34,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 22:44:34,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:34,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:44:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:34,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:34,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:34,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:44:34,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:34,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:44:34,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:34,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:34,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:34,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:34,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:34,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:44:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:34,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:34,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:34,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:44:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:34,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:44:34,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:34,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-10-26 22:44:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:34,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:34,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:34,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:44:34,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 22:44:34,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:44:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:44:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 22:44:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:34,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 447 [2020-10-26 22:44:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:44:34,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:44:35,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:44:35,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:44:35,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:44:35,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-26 22:44:35,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:44:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:44:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:44:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 22:44:35,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:44:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 575 proven. 18 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2020-10-26 22:44:35,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883722672] [2020-10-26 22:44:35,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:44:35,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:44:35,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477306568] [2020-10-26 22:44:35,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:44:35,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:44:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:44:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:44:35,557 INFO L87 Difference]: Start difference. First operand 16255 states and 17812 transitions. Second operand 8 states. [2020-10-26 22:44:38,177 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:44:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:44:39,045 INFO L93 Difference]: Finished difference Result 29694 states and 32594 transitions. [2020-10-26 22:44:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:44:39,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 652 [2020-10-26 22:44:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:44:39,047 INFO L225 Difference]: With dead ends: 29694 [2020-10-26 22:44:39,047 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 22:44:39,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:44:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 22:44:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 22:44:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 22:44:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 22:44:39,070 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 652 [2020-10-26 22:44:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:44:39,070 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 22:44:39,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:44:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 22:44:39,070 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 22:44:39,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 22:44:39,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-26 22:44:42,327 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 421 DAG size of output: 394 [2020-10-26 22:44:43,167 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 394 [2020-10-26 22:44:43,942 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 33