/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/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:46:19,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:46:19,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:46:19,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:46:19,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:46:19,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:46:19,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:46:19,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:46:19,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:46:19,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:46:19,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:46:19,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:46:19,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:46:19,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:46:19,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:46:19,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:46:19,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:46:19,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:46:19,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:46:19,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:46:19,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:46:19,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:46:19,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:46:19,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:46:19,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:46:19,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:46:19,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:46:19,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:46:19,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:46:19,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:46:19,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:46:19,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:46:19,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:46:19,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:46:19,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:46:19,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:46:19,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:46:19,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:46:19,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:46:19,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:46:19,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:46:19,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:46:19,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:46:19,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:46:19,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:46:19,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:46:19,204 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:46:19,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:46:19,205 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:46:19,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:46:19,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:46:19,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:46:19,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:46:19,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:46:19,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:46:19,207 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:46:19,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:46:19,207 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:46:19,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:46:19,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:46:19,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:46:19,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:46:19,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:46:19,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:46:19,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:46:19,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:46:19,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:46:19,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:46:19,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:46:19,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:46:19,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:46:19,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:46:19,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:46:19,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:46:19,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:46:19,623 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:46:19,624 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:46:19,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-27 01:46:19,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38ffaa50a/85817f3bfa6f424fbf268788a79acee7/FLAG5780148c8 [2020-10-27 01:46:20,326 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:46:20,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-27 01:46:20,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38ffaa50a/85817f3bfa6f424fbf268788a79acee7/FLAG5780148c8 [2020-10-27 01:46:20,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38ffaa50a/85817f3bfa6f424fbf268788a79acee7 [2020-10-27 01:46:20,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:46:20,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:46:20,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:46:20,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:46:20,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:46:20,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:20,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70929dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20, skipping insertion in model container [2020-10-27 01:46:20,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:20,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:46:20,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:46:20,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:46:20,957 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:46:20,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:46:20,996 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:46:20,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20 WrapperNode [2020-10-27 01:46:20,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:46:20,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:46:20,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:46:20,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:46:21,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:21,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:21,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:21,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:21,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:21,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:21,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (1/1) ... [2020-10-27 01:46:21,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:46:21,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:46:21,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:46:21,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:46:21,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:46:21,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:46:21,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:46:21,117 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:46:21,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:46:21,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:46:21,118 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:46:21,118 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:46:21,118 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:46:21,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:46:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:46:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:46:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:46:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:46:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:46:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:46:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:46:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:46:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:46:21,389 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:46:21,390 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 01:46:21,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:46:21 BoogieIcfgContainer [2020-10-27 01:46:21,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:46:21,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:46:21,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:46:21,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:46:21,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:46:20" (1/3) ... [2020-10-27 01:46:21,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc4abba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:46:21, skipping insertion in model container [2020-10-27 01:46:21,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:46:20" (2/3) ... [2020-10-27 01:46:21,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc4abba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:46:21, skipping insertion in model container [2020-10-27 01:46:21,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:46:21" (3/3) ... [2020-10-27 01:46:21,402 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.c [2020-10-27 01:46:21,416 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:46:21,421 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:46:21,439 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:46:21,500 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:46:21,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:46:21,527 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:46:21,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:46:21,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:46:21,528 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:46:21,528 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:46:21,528 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:46:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-27 01:46:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:46:21,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:21,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:21,586 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:21,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2036788406, now seen corresponding path program 1 times [2020-10-27 01:46:21,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:21,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296182148] [2020-10-27 01:46:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:21,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:22,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:22,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:22,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:22,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:22,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:46:22,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:46:22,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 760 [2020-10-27 01:46:22,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:46:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:46:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:46:22,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:22,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:22,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:22,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:22,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:22,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:46:22,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:22,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:22,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:22,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:22,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:46:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:22,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296182148] [2020-10-27 01:46:22,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:46:22,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:46:22,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200429100] [2020-10-27 01:46:22,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:46:22,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:46:22,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:46:22,908 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2020-10-27 01:46:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:23,269 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2020-10-27 01:46:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:46:23,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:46:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:23,279 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:46:23,279 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:46:23,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:46:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:46:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:46:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-10-27 01:46:23,343 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 17 [2020-10-27 01:46:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:23,344 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-10-27 01:46:23,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:46:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-10-27 01:46:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:46:23,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:23,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:23,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:46:23,346 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1403961586, now seen corresponding path program 1 times [2020-10-27 01:46:23,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:23,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045675613] [2020-10-27 01:46:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:23,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:23,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:23,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:23,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:23,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:23,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:46:23,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:46:23,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-27 01:46:23,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:23,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:46:23,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:23,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:46:23,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:23,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:23,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:23,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:23,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:23,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:23,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:46:23,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:23,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:23,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:23,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:24,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045675613] [2020-10-27 01:46:24,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:46:24,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:46:24,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086500584] [2020-10-27 01:46:24,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:46:24,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:46:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:24,008 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-10-27 01:46:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:24,195 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-10-27 01:46:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:46:24,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 01:46:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:24,198 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:46:24,198 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:46:24,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:46:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:46:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 01:46:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:46:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-10-27 01:46:24,209 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2020-10-27 01:46:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:24,210 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-10-27 01:46:24,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:46:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-10-27 01:46:24,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:46:24,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:24,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:24,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:46:24,212 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:24,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1941968995, now seen corresponding path program 1 times [2020-10-27 01:46:24,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:24,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943718689] [2020-10-27 01:46:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:24,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:24,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:46:24,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:24,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 01:46:24,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:24,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:46:24,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:46:24,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:46:24,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:24,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:24,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:24,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:24,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:46:24,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:24,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:24,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:24,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:24,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943718689] [2020-10-27 01:46:24,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:46:24,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:46:24,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084058746] [2020-10-27 01:46:24,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:46:24,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:24,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:46:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:46:24,328 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 4 states. [2020-10-27 01:46:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:24,424 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-27 01:46:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:46:24,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 01:46:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:24,426 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:46:24,426 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:46:24,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:46:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:46:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:46:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-10-27 01:46:24,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 18 [2020-10-27 01:46:24,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:24,435 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-10-27 01:46:24,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:46:24,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-10-27 01:46:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:46:24,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:24,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:24,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:46:24,436 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1302000028, now seen corresponding path program 1 times [2020-10-27 01:46:24,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:24,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429054892] [2020-10-27 01:46:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:24,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:24,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:24,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:46:24,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:24,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-27 01:46:24,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:46:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:24,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:24,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:25,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:25,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:25,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:25,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:25,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:46:25,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:25,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:25,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429054892] [2020-10-27 01:46:25,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:25,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:46:25,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803634625] [2020-10-27 01:46:25,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:46:25,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:25,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:46:25,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:46:25,048 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2020-10-27 01:46:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:25,342 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2020-10-27 01:46:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:46:25,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:46:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:25,345 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:46:25,346 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:46:25,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:46:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-10-27 01:46:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:46:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-27 01:46:25,365 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 18 [2020-10-27 01:46:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:25,366 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-27 01:46:25,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:46:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-27 01:46:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:46:25,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:25,370 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:25,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:46:25,371 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:25,371 INFO L82 PathProgramCache]: Analyzing trace with hash 951047666, now seen corresponding path program 2 times [2020-10-27 01:46:25,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:25,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287390322] [2020-10-27 01:46:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:25,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:25,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:46:25,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:25,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-27 01:46:25,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:46:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:46:25,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:25,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:25,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:25,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:25,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:25,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:46:25,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:25,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287390322] [2020-10-27 01:46:25,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:25,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:46:25,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657393947] [2020-10-27 01:46:25,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:46:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:25,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:46:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:46:25,918 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2020-10-27 01:46:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:26,166 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-10-27 01:46:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:46:26,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 01:46:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:26,168 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:46:26,168 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:46:26,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:46:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-27 01:46:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:46:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-10-27 01:46:26,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 19 [2020-10-27 01:46:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:26,179 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-10-27 01:46:26,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:46:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-10-27 01:46:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:46:26,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:26,180 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] [2020-10-27 01:46:26,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:46:26,180 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1402946349, now seen corresponding path program 1 times [2020-10-27 01:46:26,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:26,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401653480] [2020-10-27 01:46:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:26,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:26,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:27,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:46:27,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:46:27,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1169 [2020-10-27 01:46:27,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:27,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:46:27,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:46:27,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:27,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:27,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:27,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:27,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:27,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:27,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:27,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:27,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401653480] [2020-10-27 01:46:27,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:27,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:46:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622766988] [2020-10-27 01:46:27,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:46:27,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:46:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:46:27,512 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 8 states. [2020-10-27 01:46:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:27,758 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2020-10-27 01:46:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:46:27,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 01:46:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:27,760 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:46:27,760 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:46:27,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:46:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:46:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 01:46:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:46:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2020-10-27 01:46:27,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 20 [2020-10-27 01:46:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:27,770 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2020-10-27 01:46:27,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:46:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2020-10-27 01:46:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:46:27,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:27,771 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:27,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:46:27,772 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash 523411666, now seen corresponding path program 1 times [2020-10-27 01:46:27,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:27,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356170038] [2020-10-27 01:46:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:27,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:27,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:28,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:28,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:46:28,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:46:28,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-27 01:46:28,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:28,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:46:28,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:28,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:46:28,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:28,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:29,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:29,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:46:29,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:29,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:29,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356170038] [2020-10-27 01:46:29,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:29,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:29,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372861896] [2020-10-27 01:46:29,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:29,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:29,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:29,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:29,016 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand 7 states. [2020-10-27 01:46:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:29,373 INFO L93 Difference]: Finished difference Result 60 states and 85 transitions. [2020-10-27 01:46:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:46:29,374 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:46:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:29,375 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:46:29,375 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:46:29,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:46:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2020-10-27 01:46:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:46:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-10-27 01:46:29,394 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 20 [2020-10-27 01:46:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:29,395 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-10-27 01:46:29,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-10-27 01:46:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:46:29,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:29,396 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:29,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:46:29,397 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2076049444, now seen corresponding path program 3 times [2020-10-27 01:46:29,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:29,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691661793] [2020-10-27 01:46:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:29,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:30,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:30,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:46:30,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-27 01:46:30,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:46:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:30,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:30,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:30,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:30,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:30,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:30,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:30,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:30,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:30,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:30,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:46:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:30,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691661793] [2020-10-27 01:46:30,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:30,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:30,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673111693] [2020-10-27 01:46:30,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:30,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:30,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:30,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:30,208 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 7 states. [2020-10-27 01:46:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:30,564 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2020-10-27 01:46:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:46:30,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:46:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:30,566 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:46:30,566 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:46:30,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:46:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-10-27 01:46:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:46:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2020-10-27 01:46:30,576 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 20 [2020-10-27 01:46:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:30,577 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2020-10-27 01:46:30,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2020-10-27 01:46:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:46:30,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:30,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:30,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:46:30,578 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash 527673329, now seen corresponding path program 1 times [2020-10-27 01:46:30,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:30,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625149637] [2020-10-27 01:46:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:30,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:30,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:30,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:30,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:46:30,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:30,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 01:46:30,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:46:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:46:30,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:30,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:30,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:30,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:30,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:30,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:30,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:46:30,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625149637] [2020-10-27 01:46:30,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:30,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:46:30,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35975986] [2020-10-27 01:46:30,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:46:30,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:46:30,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:30,787 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 5 states. [2020-10-27 01:46:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:30,964 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2020-10-27 01:46:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:46:30,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 01:46:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:30,965 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:46:30,965 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:46:30,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:46:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 01:46:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:46:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2020-10-27 01:46:30,977 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 21 [2020-10-27 01:46:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:30,977 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2020-10-27 01:46:30,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:46:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2020-10-27 01:46:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:46:30,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:30,978 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] [2020-10-27 01:46:30,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:46:30,979 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:30,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1065680738, now seen corresponding path program 1 times [2020-10-27 01:46:30,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:30,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931550685] [2020-10-27 01:46:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:30,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:31,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:46:31,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 01:46:31,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:46:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:46:31,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:46:31,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:31,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:31,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:31,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:31,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:31,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:31,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:31,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:31,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:31,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:31,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:46:31,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931550685] [2020-10-27 01:46:31,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:31,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:46:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234563299] [2020-10-27 01:46:31,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:46:31,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:46:31,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:31,157 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand 5 states. [2020-10-27 01:46:31,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:31,331 INFO L93 Difference]: Finished difference Result 79 states and 109 transitions. [2020-10-27 01:46:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:46:31,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 01:46:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:31,333 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:46:31,333 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:46:31,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:46:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-10-27 01:46:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:46:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2020-10-27 01:46:31,344 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 21 [2020-10-27 01:46:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:31,345 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2020-10-27 01:46:31,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:46:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2020-10-27 01:46:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:46:31,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:31,346 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:31,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:46:31,347 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:31,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1703601102, now seen corresponding path program 4 times [2020-10-27 01:46:31,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:31,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502879433] [2020-10-27 01:46:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:31,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:32,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:46:32,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-27 01:46:32,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:46:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:46:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:32,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:32,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:32,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:32,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:46:32,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:32,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:32,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:32,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:32,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:32,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502879433] [2020-10-27 01:46:32,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:32,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:46:32,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270744747] [2020-10-27 01:46:32,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:46:32,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:46:32,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:32,227 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand 9 states. [2020-10-27 01:46:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:32,795 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2020-10-27 01:46:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:46:32,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-27 01:46:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:32,797 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:46:32,797 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:46:32,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:46:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2020-10-27 01:46:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:46:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 107 transitions. [2020-10-27 01:46:32,821 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 107 transitions. Word has length 21 [2020-10-27 01:46:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:32,822 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 107 transitions. [2020-10-27 01:46:32,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:46:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 107 transitions. [2020-10-27 01:46:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:46:32,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:32,825 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:32,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:46:32,826 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:32,826 INFO L82 PathProgramCache]: Analyzing trace with hash -776524444, now seen corresponding path program 2 times [2020-10-27 01:46:32,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:32,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205386416] [2020-10-27 01:46:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:32,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:33,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:33,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:34,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:34,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:46:34,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:46:34,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1939 [2020-10-27 01:46:34,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:46:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:46:34,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:34,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:34,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:34,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:34,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:34,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:34,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:34,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:34,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:34,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:34,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:46:34,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205386416] [2020-10-27 01:46:34,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:34,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:34,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986782113] [2020-10-27 01:46:34,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:34,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:34,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:34,906 INFO L87 Difference]: Start difference. First operand 77 states and 107 transitions. Second operand 7 states. [2020-10-27 01:46:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:35,373 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2020-10-27 01:46:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:46:35,374 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 01:46:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:35,375 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:46:35,375 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:46:35,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:46:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:46:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-27 01:46:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:46:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2020-10-27 01:46:35,399 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 22 [2020-10-27 01:46:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:35,400 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2020-10-27 01:46:35,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2020-10-27 01:46:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:46:35,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:35,405 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:35,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:46:35,405 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:35,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1386316260, now seen corresponding path program 5 times [2020-10-27 01:46:35,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:35,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573479241] [2020-10-27 01:46:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:35,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:35,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:35,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:35,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:35,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:36,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:36,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:46:36,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:36,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-27 01:46:36,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:36,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:46:36,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:36,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:46:36,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:36,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:36,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:36,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:36,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:36,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:36,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:46:36,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:36,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:36,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:36,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:36,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:36,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573479241] [2020-10-27 01:46:36,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:36,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:46:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040082461] [2020-10-27 01:46:36,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:46:36,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:36,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:46:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:46:36,669 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand 10 states. [2020-10-27 01:46:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:37,429 INFO L93 Difference]: Finished difference Result 143 states and 209 transitions. [2020-10-27 01:46:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:46:37,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-27 01:46:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:37,432 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:46:37,432 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:46:37,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:46:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:46:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-27 01:46:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:46:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2020-10-27 01:46:37,452 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 22 [2020-10-27 01:46:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:37,452 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2020-10-27 01:46:37,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:46:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2020-10-27 01:46:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:37,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:37,454 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:37,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:46:37,455 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1274384913, now seen corresponding path program 1 times [2020-10-27 01:46:37,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:37,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639638854] [2020-10-27 01:46:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:37,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:37,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:37,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 01:46:37,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:46:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:46:37,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:37,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:37,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:37,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:37,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:37,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:37,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:37,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:37,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:37,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:46:37,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639638854] [2020-10-27 01:46:37,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:37,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:46:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35559874] [2020-10-27 01:46:37,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:46:37,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:46:37,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:46:37,624 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand 5 states. [2020-10-27 01:46:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:37,779 INFO L93 Difference]: Finished difference Result 94 states and 128 transitions. [2020-10-27 01:46:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:46:37,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 01:46:37,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:37,781 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:46:37,781 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:46:37,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:46:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-27 01:46:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:46:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-10-27 01:46:37,795 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 23 [2020-10-27 01:46:37,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:37,796 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-10-27 01:46:37,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:46:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-10-27 01:46:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:37,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:37,797 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:37,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:46:37,797 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1084055950, now seen corresponding path program 2 times [2020-10-27 01:46:37,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:37,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812440494] [2020-10-27 01:46:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:37,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:37,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:37,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:38,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:38,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:38,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:46:38,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-10-27 01:46:38,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:38,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:46:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:46:38,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:38,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:38,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:38,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:38,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:38,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:38,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:38,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:46:38,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812440494] [2020-10-27 01:46:38,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:38,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:46:38,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347995553] [2020-10-27 01:46:38,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:46:38,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:38,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:46:38,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:46:38,595 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 8 states. [2020-10-27 01:46:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:38,982 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2020-10-27 01:46:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:46:38,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:46:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:38,984 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:46:38,984 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 01:46:38,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:46:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 01:46:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-10-27 01:46:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:46:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 99 transitions. [2020-10-27 01:46:39,002 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 99 transitions. Word has length 23 [2020-10-27 01:46:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:39,005 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 99 transitions. [2020-10-27 01:46:39,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:46:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 99 transitions. [2020-10-27 01:46:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:39,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:39,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:39,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:46:39,008 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash 558001170, now seen corresponding path program 2 times [2020-10-27 01:46:39,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:39,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91922948] [2020-10-27 01:46:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:39,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:41,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:41,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:41,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:46:41,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2861 [2020-10-27 01:46:41,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:46:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:41,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:46:41,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:42,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:42,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:42,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:42,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:46:42,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:46:42,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91922948] [2020-10-27 01:46:42,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:42,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:46:42,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856862085] [2020-10-27 01:46:42,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:46:42,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:42,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:46:42,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:42,053 INFO L87 Difference]: Start difference. First operand 72 states and 99 transitions. Second operand 9 states. [2020-10-27 01:46:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:42,464 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-10-27 01:46:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:46:42,466 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:46:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:42,467 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:46:42,467 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:46:42,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:46:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:46:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-27 01:46:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:46:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 112 transitions. [2020-10-27 01:46:42,479 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 112 transitions. Word has length 23 [2020-10-27 01:46:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:42,479 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 112 transitions. [2020-10-27 01:46:42,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:46:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 112 transitions. [2020-10-27 01:46:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:42,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:42,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:42,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:46:42,481 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1486547616, now seen corresponding path program 2 times [2020-10-27 01:46:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:42,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502107756] [2020-10-27 01:46:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:42,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:44,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:44,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:46:44,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1711 [2020-10-27 01:46:44,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:46:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:46:44,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:44,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:44,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:44,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:44,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:44,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:44,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:44,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:44,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:44,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:44,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:46:44,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502107756] [2020-10-27 01:46:44,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:44,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:46:44,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951599995] [2020-10-27 01:46:44,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:46:44,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:44,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:46:44,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:46:44,323 INFO L87 Difference]: Start difference. First operand 80 states and 112 transitions. Second operand 8 states. [2020-10-27 01:46:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:44,749 INFO L93 Difference]: Finished difference Result 111 states and 151 transitions. [2020-10-27 01:46:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:46:44,749 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:46:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:44,750 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:46:44,750 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:46:44,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:46:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:46:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2020-10-27 01:46:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:46:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-10-27 01:46:44,761 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 23 [2020-10-27 01:46:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:44,761 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-10-27 01:46:44,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:46:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-10-27 01:46:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:46:44,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:44,762 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:44,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:46:44,763 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:44,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1610493326, now seen corresponding path program 6 times [2020-10-27 01:46:44,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:44,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435539314] [2020-10-27 01:46:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:44,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:44,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:45,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:46:45,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:45,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-27 01:46:45,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:45,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:46:45,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:45,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:46:45,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:45,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:45,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:45,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:45,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:45,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:45,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:45,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:45,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435539314] [2020-10-27 01:46:45,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:45,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:46:45,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570360329] [2020-10-27 01:46:45,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:46:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:45,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:46:45,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:45,966 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 11 states. [2020-10-27 01:46:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:46,840 INFO L93 Difference]: Finished difference Result 138 states and 208 transitions. [2020-10-27 01:46:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:46:46,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-27 01:46:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:46,842 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:46:46,842 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:46:46,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:46:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:46:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2020-10-27 01:46:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:46:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2020-10-27 01:46:46,855 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 23 [2020-10-27 01:46:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:46,856 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2020-10-27 01:46:46,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:46:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2020-10-27 01:46:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:46:46,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:46,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:46,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:46:46,857 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1187504274, now seen corresponding path program 3 times [2020-10-27 01:46:46,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:46,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890519537] [2020-10-27 01:46:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:46,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:46,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:47,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:46:47,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:46:47,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-27 01:46:47,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:46:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:46:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:46:47,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:47,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:47,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:47,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:47,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:47,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:47,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:46:47,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:47,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:46:47,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890519537] [2020-10-27 01:46:47,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:47,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:46:47,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660201104] [2020-10-27 01:46:47,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:46:47,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:47,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:46:47,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:46:47,646 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand 6 states. [2020-10-27 01:46:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:47,979 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2020-10-27 01:46:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:46:47,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:46:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:47,980 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:46:47,981 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:46:47,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:46:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:46:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-10-27 01:46:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:46:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2020-10-27 01:46:47,996 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 24 [2020-10-27 01:46:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:47,996 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2020-10-27 01:46:47,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:46:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2020-10-27 01:46:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:46:47,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:47,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:47,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:46:47,998 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1725511683, now seen corresponding path program 3 times [2020-10-27 01:46:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:47,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372915421] [2020-10-27 01:46:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:48,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:48,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:46:48,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:46:48,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-27 01:46:48,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:46:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:46:48,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:46:48,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:48,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:48,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:48,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:48,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:48,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:48,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:48,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:48,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:48,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:48,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:48,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:46:48,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372915421] [2020-10-27 01:46:48,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:48,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:46:48,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176619632] [2020-10-27 01:46:48,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:46:48,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:48,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:46:48,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:46:48,713 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand 6 states. [2020-10-27 01:46:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:49,153 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2020-10-27 01:46:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:46:49,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:46:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:49,155 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:46:49,155 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 01:46:49,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 01:46:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-27 01:46:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 01:46:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 151 transitions. [2020-10-27 01:46:49,174 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 151 transitions. Word has length 24 [2020-10-27 01:46:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:49,175 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 151 transitions. [2020-10-27 01:46:49,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:46:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 151 transitions. [2020-10-27 01:46:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:46:49,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:49,176 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:49,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:46:49,176 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash -22309980, now seen corresponding path program 7 times [2020-10-27 01:46:49,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:49,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534166497] [2020-10-27 01:46:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:49,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:49,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:50,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:46:50,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:50,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-27 01:46:50,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:50,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:46:50,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:46:50,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:50,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:50,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:50,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:50,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:50,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:50,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:50,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:50,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:50,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:50,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:50,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534166497] [2020-10-27 01:46:50,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:50,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:46:50,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293501249] [2020-10-27 01:46:50,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:46:50,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:50,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:46:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:50,702 INFO L87 Difference]: Start difference. First operand 108 states and 151 transitions. Second operand 11 states. [2020-10-27 01:46:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:51,693 INFO L93 Difference]: Finished difference Result 159 states and 228 transitions. [2020-10-27 01:46:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:46:51,694 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-27 01:46:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:51,696 INFO L225 Difference]: With dead ends: 159 [2020-10-27 01:46:51,696 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:46:51,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:46:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:46:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-27 01:46:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:46:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2020-10-27 01:46:51,728 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 24 [2020-10-27 01:46:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:51,728 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2020-10-27 01:46:51,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:46:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2020-10-27 01:46:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:46:51,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:51,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:51,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:46:51,729 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash -736368078, now seen corresponding path program 4 times [2020-10-27 01:46:51,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:51,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458831463] [2020-10-27 01:46:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:51,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:51,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:51,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:51,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:46:51,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:46:51,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 01:46:51,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:46:51,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:46:51,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:46:51,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:52,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:52,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:52,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:52,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:52,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:46:52,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458831463] [2020-10-27 01:46:52,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:52,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:46:52,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972028865] [2020-10-27 01:46:52,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:46:52,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:46:52,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:46:52,077 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand 7 states. [2020-10-27 01:46:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:52,460 INFO L93 Difference]: Finished difference Result 172 states and 230 transitions. [2020-10-27 01:46:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:46:52,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 01:46:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:52,464 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:46:52,464 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 01:46:52,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 01:46:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 127. [2020-10-27 01:46:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:46:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2020-10-27 01:46:52,484 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 25 [2020-10-27 01:46:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:52,484 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2020-10-27 01:46:52,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:46:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2020-10-27 01:46:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:46:52,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:52,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:52,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:46:52,485 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:52,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1684469218, now seen corresponding path program 5 times [2020-10-27 01:46:52,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:52,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685778681] [2020-10-27 01:46:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:52,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:52,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:53,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:53,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:46:53,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:46:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-27 01:46:53,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:46:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:46:53,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:53,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:53,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:53,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:53,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:53,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:46:53,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:53,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:53,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:53,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:53,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:46:53,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685778681] [2020-10-27 01:46:53,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:53,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:46:53,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031653752] [2020-10-27 01:46:53,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:46:53,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:46:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:46:53,546 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand 11 states. [2020-10-27 01:46:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:54,174 INFO L93 Difference]: Finished difference Result 168 states and 228 transitions. [2020-10-27 01:46:54,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:46:54,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 01:46:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:54,177 INFO L225 Difference]: With dead ends: 168 [2020-10-27 01:46:54,177 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 01:46:54,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:46:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 01:46:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 127. [2020-10-27 01:46:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:46:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 177 transitions. [2020-10-27 01:46:54,201 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 177 transitions. Word has length 25 [2020-10-27 01:46:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:54,201 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 177 transitions. [2020-10-27 01:46:54,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:46:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 177 transitions. [2020-10-27 01:46:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:46:54,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:54,202 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:54,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:46:54,203 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1966733490, now seen corresponding path program 8 times [2020-10-27 01:46:54,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:54,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248664132] [2020-10-27 01:46:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:54,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:54,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:54,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:54,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:54,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:55,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:46:55,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:46:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-27 01:46:55,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:46:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:46:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:55,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:55,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:55,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:55,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:55,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:46:55,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:55,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:55,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:55,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:46:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:55,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248664132] [2020-10-27 01:46:55,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:55,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:46:55,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610471635] [2020-10-27 01:46:55,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:46:55,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:46:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:46:55,489 INFO L87 Difference]: Start difference. First operand 127 states and 177 transitions. Second operand 12 states. [2020-10-27 01:46:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:56,763 INFO L93 Difference]: Finished difference Result 245 states and 363 transitions. [2020-10-27 01:46:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:46:56,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-27 01:46:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:56,768 INFO L225 Difference]: With dead ends: 245 [2020-10-27 01:46:56,768 INFO L226 Difference]: Without dead ends: 217 [2020-10-27 01:46:56,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:46:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-27 01:46:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 144. [2020-10-27 01:46:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:46:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 199 transitions. [2020-10-27 01:46:56,788 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 199 transitions. Word has length 25 [2020-10-27 01:46:56,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:56,789 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 199 transitions. [2020-10-27 01:46:56,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:46:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 199 transitions. [2020-10-27 01:46:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:56,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:56,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:56,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:46:56,790 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:56,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1982297443, now seen corresponding path program 4 times [2020-10-27 01:46:56,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:56,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981630695] [2020-10-27 01:46:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:56,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:56,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:56,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:58,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:58,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:46:58,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:46:58,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1381 [2020-10-27 01:46:58,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:58,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:46:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:58,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:46:58,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:58,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:58,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:58,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:58,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:58,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:58,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:46:58,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:58,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:46:58,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981630695] [2020-10-27 01:46:58,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:58,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:46:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200558065] [2020-10-27 01:46:58,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:46:58,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:46:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:46:58,322 INFO L87 Difference]: Start difference. First operand 144 states and 199 transitions. Second operand 9 states. [2020-10-27 01:46:59,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:59,085 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2020-10-27 01:46:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:46:59,086 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:46:59,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:59,087 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:46:59,088 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:46:59,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:46:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:46:59,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-27 01:46:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 01:46:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2020-10-27 01:46:59,107 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 26 [2020-10-27 01:46:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:59,107 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2020-10-27 01:46:59,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:46:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2020-10-27 01:46:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:46:59,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:59,108 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:59,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:46:59,108 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:59,109 INFO L82 PathProgramCache]: Analyzing trace with hash -343038989, now seen corresponding path program 3 times [2020-10-27 01:46:59,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:59,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489556770] [2020-10-27 01:46:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:59,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:00,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:03,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:03,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:47:03,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:47:03,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4710 [2020-10-27 01:47:03,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:03,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:47:03,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:03,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:47:03,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:03,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:03,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:03,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:03,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:03,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:03,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:03,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:03,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:03,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:03,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:03,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:47:03,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489556770] [2020-10-27 01:47:03,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:03,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:47:03,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377105582] [2020-10-27 01:47:03,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:47:03,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:03,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:47:03,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:47:03,992 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand 10 states. [2020-10-27 01:47:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:04,563 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2020-10-27 01:47:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:47:04,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:47:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:04,565 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:47:04,566 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 01:47:04,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 01:47:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2020-10-27 01:47:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 01:47:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2020-10-27 01:47:04,584 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 26 [2020-10-27 01:47:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:04,585 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2020-10-27 01:47:04,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:47:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2020-10-27 01:47:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:47:04,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:04,586 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:04,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:47:04,586 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash -797428380, now seen corresponding path program 9 times [2020-10-27 01:47:04,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:04,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626092180] [2020-10-27 01:47:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:04,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:04,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:05,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:05,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:47:05,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:05,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-27 01:47:05,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:05,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:47:05,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:05,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:47:05,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:05,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:05,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:05,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:05,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:05,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:05,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:05,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:05,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:05,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:05,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:05,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:05,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626092180] [2020-10-27 01:47:05,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:05,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:47:05,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630653534] [2020-10-27 01:47:05,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:47:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:05,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:47:05,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:47:05,987 INFO L87 Difference]: Start difference. First operand 158 states and 216 transitions. Second operand 14 states. [2020-10-27 01:47:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:07,565 INFO L93 Difference]: Finished difference Result 303 states and 447 transitions. [2020-10-27 01:47:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:47:07,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-27 01:47:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:07,568 INFO L225 Difference]: With dead ends: 303 [2020-10-27 01:47:07,568 INFO L226 Difference]: Without dead ends: 272 [2020-10-27 01:47:07,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:47:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-27 01:47:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 167. [2020-10-27 01:47:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:47:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 229 transitions. [2020-10-27 01:47:07,601 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 229 transitions. Word has length 26 [2020-10-27 01:47:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:07,602 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 229 transitions. [2020-10-27 01:47:07,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:47:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 229 transitions. [2020-10-27 01:47:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:47:07,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:07,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:07,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:47:07,603 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash -574128544, now seen corresponding path program 6 times [2020-10-27 01:47:07,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:07,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137123377] [2020-10-27 01:47:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:07,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:07,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:08,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:47:08,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:08,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-27 01:47:08,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:08,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:47:08,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:08,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:08,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:08,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:08,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:08,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:08,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:08,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:08,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:08,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:08,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:08,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:08,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:47:08,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137123377] [2020-10-27 01:47:08,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:08,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:08,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286272785] [2020-10-27 01:47:08,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:08,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:08,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:08,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:08,740 INFO L87 Difference]: Start difference. First operand 167 states and 229 transitions. Second operand 11 states. [2020-10-27 01:47:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:09,530 INFO L93 Difference]: Finished difference Result 189 states and 258 transitions. [2020-10-27 01:47:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:47:09,531 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 01:47:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:09,533 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:47:09,533 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:47:09,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:47:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:47:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2020-10-27 01:47:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:47:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 222 transitions. [2020-10-27 01:47:09,552 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 222 transitions. Word has length 27 [2020-10-27 01:47:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:09,552 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 222 transitions. [2020-10-27 01:47:09,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 222 transitions. [2020-10-27 01:47:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:47:09,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:09,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:09,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:47:09,554 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash -974936879, now seen corresponding path program 5 times [2020-10-27 01:47:09,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:09,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144337313] [2020-10-27 01:47:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:09,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:09,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:10,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:47:10,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:10,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-27 01:47:10,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:10,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:10,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:10,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:10,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:10,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:10,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:10,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:10,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:10,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:10,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:10,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:10,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:47:10,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144337313] [2020-10-27 01:47:10,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:10,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:47:10,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765874291] [2020-10-27 01:47:10,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:47:10,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:10,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:47:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:47:10,662 INFO L87 Difference]: Start difference. First operand 161 states and 222 transitions. Second operand 7 states. [2020-10-27 01:47:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:11,132 INFO L93 Difference]: Finished difference Result 209 states and 295 transitions. [2020-10-27 01:47:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:47:11,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:47:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:11,135 INFO L225 Difference]: With dead ends: 209 [2020-10-27 01:47:11,135 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 01:47:11,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 01:47:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 188. [2020-10-27 01:47:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 01:47:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 261 transitions. [2020-10-27 01:47:11,179 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 261 transitions. Word has length 27 [2020-10-27 01:47:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:11,180 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 261 transitions. [2020-10-27 01:47:11,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:47:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 261 transitions. [2020-10-27 01:47:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:47:11,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:11,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:11,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:47:11,181 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash -436929470, now seen corresponding path program 7 times [2020-10-27 01:47:11,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:11,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442869657] [2020-10-27 01:47:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:11,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:11,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:11,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:47:11,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:11,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-27 01:47:11,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:47:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:11,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:12,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:12,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:12,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:12,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:12,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:12,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:12,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:12,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:12,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:47:12,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442869657] [2020-10-27 01:47:12,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:12,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:47:12,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947442800] [2020-10-27 01:47:12,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:47:12,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:12,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:47:12,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:47:12,020 INFO L87 Difference]: Start difference. First operand 188 states and 261 transitions. Second operand 7 states. [2020-10-27 01:47:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:12,583 INFO L93 Difference]: Finished difference Result 214 states and 298 transitions. [2020-10-27 01:47:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:47:12,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:47:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:12,587 INFO L225 Difference]: With dead ends: 214 [2020-10-27 01:47:12,587 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 01:47:12,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 01:47:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 175. [2020-10-27 01:47:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 01:47:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 244 transitions. [2020-10-27 01:47:12,614 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 244 transitions. Word has length 27 [2020-10-27 01:47:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:12,615 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 244 transitions. [2020-10-27 01:47:12,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:47:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 244 transitions. [2020-10-27 01:47:12,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:47:12,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:12,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:12,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:47:12,616 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash -169312014, now seen corresponding path program 8 times [2020-10-27 01:47:12,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:12,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863947113] [2020-10-27 01:47:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:12,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:12,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:13,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:47:13,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:13,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-27 01:47:13,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:47:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:47:13,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:13,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:13,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:13,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:13,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:13,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:13,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:13,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:13,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:13,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:13,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:13,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:47:13,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863947113] [2020-10-27 01:47:13,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:13,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:47:13,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648976346] [2020-10-27 01:47:13,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:47:13,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:47:13,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:47:13,436 INFO L87 Difference]: Start difference. First operand 175 states and 244 transitions. Second operand 10 states. [2020-10-27 01:47:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:14,162 INFO L93 Difference]: Finished difference Result 225 states and 306 transitions. [2020-10-27 01:47:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:47:14,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:47:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:14,167 INFO L225 Difference]: With dead ends: 225 [2020-10-27 01:47:14,168 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 01:47:14,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:47:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 01:47:14,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 175. [2020-10-27 01:47:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 01:47:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 243 transitions. [2020-10-27 01:47:14,190 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 243 transitions. Word has length 27 [2020-10-27 01:47:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:14,190 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 243 transitions. [2020-10-27 01:47:14,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:47:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 243 transitions. [2020-10-27 01:47:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:47:14,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:14,191 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:14,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:47:14,191 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:14,192 INFO L82 PathProgramCache]: Analyzing trace with hash -587100430, now seen corresponding path program 10 times [2020-10-27 01:47:14,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:14,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127438355] [2020-10-27 01:47:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:14,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:14,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:15,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:47:15,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:15,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-27 01:47:15,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:15,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:47:15,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:15,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:15,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:15,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:15,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:15,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:15,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:15,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:15,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:15,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127438355] [2020-10-27 01:47:15,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:15,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:47:15,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584497888] [2020-10-27 01:47:15,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:47:15,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:47:15,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:47:15,650 INFO L87 Difference]: Start difference. First operand 175 states and 243 transitions. Second operand 15 states. [2020-10-27 01:47:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:17,576 INFO L93 Difference]: Finished difference Result 317 states and 464 transitions. [2020-10-27 01:47:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:47:17,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-27 01:47:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:17,579 INFO L225 Difference]: With dead ends: 317 [2020-10-27 01:47:17,579 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 01:47:17,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:47:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 01:47:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 185. [2020-10-27 01:47:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-27 01:47:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 258 transitions. [2020-10-27 01:47:17,605 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 258 transitions. Word has length 27 [2020-10-27 01:47:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:17,605 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 258 transitions. [2020-10-27 01:47:17,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:47:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 258 transitions. [2020-10-27 01:47:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:17,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:17,606 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:17,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:47:17,606 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash -119480925, now seen corresponding path program 2 times [2020-10-27 01:47:17,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:17,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520563962] [2020-10-27 01:47:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:17,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:17,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:17,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:17,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:17,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-27 01:47:17,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:47:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:47:17,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:47:17,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:17,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:17,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:17,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:17,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:17,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:17,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:17,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:17,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:17,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:17,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:47:17,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520563962] [2020-10-27 01:47:17,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:17,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:47:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461667729] [2020-10-27 01:47:17,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:47:17,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:47:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:47:17,778 INFO L87 Difference]: Start difference. First operand 185 states and 258 transitions. Second operand 6 states. [2020-10-27 01:47:18,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:18,113 INFO L93 Difference]: Finished difference Result 221 states and 304 transitions. [2020-10-27 01:47:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:47:18,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-27 01:47:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:18,116 INFO L225 Difference]: With dead ends: 221 [2020-10-27 01:47:18,116 INFO L226 Difference]: Without dead ends: 195 [2020-10-27 01:47:18,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:47:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-27 01:47:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2020-10-27 01:47:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 01:47:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 264 transitions. [2020-10-27 01:47:18,147 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 264 transitions. Word has length 28 [2020-10-27 01:47:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:18,147 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 264 transitions. [2020-10-27 01:47:18,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:47:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 264 transitions. [2020-10-27 01:47:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:18,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:18,148 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:18,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:47:18,148 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash 947432915, now seen corresponding path program 9 times [2020-10-27 01:47:18,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:18,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061292618] [2020-10-27 01:47:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:18,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:18,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:19,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:19,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1144 [2020-10-27 01:47:19,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:47:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:47:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:47:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:19,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:19,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:19,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:19,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:19,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:19,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:19,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:19,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:19,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:19,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:47:19,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061292618] [2020-10-27 01:47:19,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:19,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:47:19,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894542860] [2020-10-27 01:47:19,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:47:19,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:19,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:47:19,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:47:19,410 INFO L87 Difference]: Start difference. First operand 189 states and 264 transitions. Second operand 7 states. [2020-10-27 01:47:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:19,986 INFO L93 Difference]: Finished difference Result 216 states and 300 transitions. [2020-10-27 01:47:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:47:19,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-27 01:47:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:19,989 INFO L225 Difference]: With dead ends: 216 [2020-10-27 01:47:19,989 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 01:47:19,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:47:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 01:47:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2020-10-27 01:47:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-27 01:47:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 268 transitions. [2020-10-27 01:47:20,011 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 268 transitions. Word has length 28 [2020-10-27 01:47:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:20,012 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 268 transitions. [2020-10-27 01:47:20,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:47:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 268 transitions. [2020-10-27 01:47:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:20,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:20,013 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:20,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:47:20,013 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:20,014 INFO L82 PathProgramCache]: Analyzing trace with hash 546624580, now seen corresponding path program 6 times [2020-10-27 01:47:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:20,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299395730] [2020-10-27 01:47:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:20,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4259 [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:24,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:24,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:24,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:24,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:24,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:24,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:24,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:24,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:24,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:24,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:24,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:47:24,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299395730] [2020-10-27 01:47:24,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:24,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:24,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375438509] [2020-10-27 01:47:24,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:24,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:24,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:24,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:24,491 INFO L87 Difference]: Start difference. First operand 193 states and 268 transitions. Second operand 11 states. [2020-10-27 01:47:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:25,800 INFO L93 Difference]: Finished difference Result 213 states and 298 transitions. [2020-10-27 01:47:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:47:25,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 01:47:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:25,803 INFO L225 Difference]: With dead ends: 213 [2020-10-27 01:47:25,803 INFO L226 Difference]: Without dead ends: 188 [2020-10-27 01:47:25,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:47:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-27 01:47:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-10-27 01:47:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 01:47:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 254 transitions. [2020-10-27 01:47:25,827 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 254 transitions. Word has length 28 [2020-10-27 01:47:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:25,827 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 254 transitions. [2020-10-27 01:47:25,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 254 transitions. [2020-10-27 01:47:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:47:25,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:25,828 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:25,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:47:25,828 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1638098724, now seen corresponding path program 11 times [2020-10-27 01:47:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:25,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982471586] [2020-10-27 01:47:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:25,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:25,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:25,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:26,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:26,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:26,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:27,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:47:27,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-27 01:47:27,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:47:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:47:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:27,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:27,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:27,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:27,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:27,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:27,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:27,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:27,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:27,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:27,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:27,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:27,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982471586] [2020-10-27 01:47:27,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:27,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:47:27,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693665882] [2020-10-27 01:47:27,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:47:27,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:47:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:27,346 INFO L87 Difference]: Start difference. First operand 187 states and 254 transitions. Second operand 16 states. [2020-10-27 01:47:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:29,372 INFO L93 Difference]: Finished difference Result 365 states and 529 transitions. [2020-10-27 01:47:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:47:29,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-10-27 01:47:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:29,375 INFO L225 Difference]: With dead ends: 365 [2020-10-27 01:47:29,375 INFO L226 Difference]: Without dead ends: 327 [2020-10-27 01:47:29,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:47:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-27 01:47:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2020-10-27 01:47:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 01:47:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 270 transitions. [2020-10-27 01:47:29,399 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 270 transitions. Word has length 28 [2020-10-27 01:47:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:29,399 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 270 transitions. [2020-10-27 01:47:29,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:47:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 270 transitions. [2020-10-27 01:47:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:29,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:29,400 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:29,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:47:29,401 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash 211698802, now seen corresponding path program 10 times [2020-10-27 01:47:29,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:29,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7370329] [2020-10-27 01:47:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:29,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:29,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:29,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:29,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:30,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:30,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:30,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:30,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-27 01:47:30,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:30,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:47:30,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:30,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:47:30,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:31,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:31,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:31,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:31,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:31,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:31,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:31,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:31,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:47:31,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7370329] [2020-10-27 01:47:31,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:31,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:47:31,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512028370] [2020-10-27 01:47:31,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:47:31,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:31,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:47:31,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:47:31,125 INFO L87 Difference]: Start difference. First operand 198 states and 270 transitions. Second operand 13 states. [2020-10-27 01:47:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:32,111 INFO L93 Difference]: Finished difference Result 246 states and 329 transitions. [2020-10-27 01:47:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:47:32,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-27 01:47:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:32,113 INFO L225 Difference]: With dead ends: 246 [2020-10-27 01:47:32,113 INFO L226 Difference]: Without dead ends: 231 [2020-10-27 01:47:32,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:47:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-27 01:47:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 198. [2020-10-27 01:47:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 01:47:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 269 transitions. [2020-10-27 01:47:32,139 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 269 transitions. Word has length 29 [2020-10-27 01:47:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:32,139 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 269 transitions. [2020-10-27 01:47:32,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:47:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 269 transitions. [2020-10-27 01:47:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:32,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:32,140 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:32,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:47:32,140 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash 844689522, now seen corresponding path program 4 times [2020-10-27 01:47:32,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:32,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806838887] [2020-10-27 01:47:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:32,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:32,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:32,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:32,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:33,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:33,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:37,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:37,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:37,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:47:37,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:47:37,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:47:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:37,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:47:37,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:37,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:37,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:37,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:37,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:37,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:37,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:37,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:37,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:37,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:37,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:37,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:47:37,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806838887] [2020-10-27 01:47:37,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:37,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:37,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364082202] [2020-10-27 01:47:37,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:37,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:37,343 INFO L87 Difference]: Start difference. First operand 198 states and 269 transitions. Second operand 11 states. [2020-10-27 01:47:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:38,012 INFO L93 Difference]: Finished difference Result 236 states and 317 transitions. [2020-10-27 01:47:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:47:38,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:47:38,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:38,015 INFO L225 Difference]: With dead ends: 236 [2020-10-27 01:47:38,015 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 01:47:38,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:47:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 01:47:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2020-10-27 01:47:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-27 01:47:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 300 transitions. [2020-10-27 01:47:38,050 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 300 transitions. Word has length 29 [2020-10-27 01:47:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:38,050 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 300 transitions. [2020-10-27 01:47:38,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 300 transitions. [2020-10-27 01:47:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:38,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:38,053 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:38,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:47:38,053 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:38,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1750586270, now seen corresponding path program 11 times [2020-10-27 01:47:38,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:38,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114733774] [2020-10-27 01:47:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:38,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:38,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:39,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:39,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:39,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:39,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-27 01:47:39,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:47:39,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:39,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:39,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:39,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:39,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:39,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:47:39,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:39,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:47:39,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114733774] [2020-10-27 01:47:39,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:39,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:47:39,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761465729] [2020-10-27 01:47:39,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:47:39,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:47:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:47:39,317 INFO L87 Difference]: Start difference. First operand 220 states and 300 transitions. Second operand 11 states. [2020-10-27 01:47:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:40,321 INFO L93 Difference]: Finished difference Result 288 states and 382 transitions. [2020-10-27 01:47:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:47:40,322 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:47:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:40,324 INFO L225 Difference]: With dead ends: 288 [2020-10-27 01:47:40,324 INFO L226 Difference]: Without dead ends: 273 [2020-10-27 01:47:40,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:47:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-27 01:47:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 220. [2020-10-27 01:47:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-27 01:47:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 299 transitions. [2020-10-27 01:47:40,349 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 299 transitions. Word has length 29 [2020-10-27 01:47:40,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:40,349 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 299 transitions. [2020-10-27 01:47:40,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:47:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 299 transitions. [2020-10-27 01:47:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:47:40,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:40,353 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:40,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:47:40,354 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1899795762, now seen corresponding path program 12 times [2020-10-27 01:47:40,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:40,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537081787] [2020-10-27 01:47:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:40,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:40,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:40,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:40,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1441 [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:47:41,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:42,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:42,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:42,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:42,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:42,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:42,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:42,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:42,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:42,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537081787] [2020-10-27 01:47:42,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:42,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:47:42,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410487049] [2020-10-27 01:47:42,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:47:42,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:47:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:42,136 INFO L87 Difference]: Start difference. First operand 220 states and 299 transitions. Second operand 17 states. [2020-10-27 01:47:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:44,424 INFO L93 Difference]: Finished difference Result 411 states and 594 transitions. [2020-10-27 01:47:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:47:44,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-27 01:47:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:44,427 INFO L225 Difference]: With dead ends: 411 [2020-10-27 01:47:44,427 INFO L226 Difference]: Without dead ends: 373 [2020-10-27 01:47:44,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:47:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-27 01:47:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 231. [2020-10-27 01:47:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 01:47:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 315 transitions. [2020-10-27 01:47:44,455 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 315 transitions. Word has length 29 [2020-10-27 01:47:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:44,456 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 315 transitions. [2020-10-27 01:47:44,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:47:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 315 transitions. [2020-10-27 01:47:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:47:44,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:44,457 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:44,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:47:44,457 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:44,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1484908594, now seen corresponding path program 7 times [2020-10-27 01:47:44,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:44,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138269238] [2020-10-27 01:47:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:44,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:44,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:44,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:45,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:45,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:47:45,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-27 01:47:45,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:47:45,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:45,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:45,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:45,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:45,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:45,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:45,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:45,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:45,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:45,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:47:45,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138269238] [2020-10-27 01:47:45,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:45,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:47:45,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805684645] [2020-10-27 01:47:45,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:47:45,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:45,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:47:45,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:47:45,997 INFO L87 Difference]: Start difference. First operand 231 states and 315 transitions. Second operand 8 states. [2020-10-27 01:47:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:46,805 INFO L93 Difference]: Finished difference Result 292 states and 407 transitions. [2020-10-27 01:47:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:47:46,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 01:47:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:46,807 INFO L225 Difference]: With dead ends: 292 [2020-10-27 01:47:46,808 INFO L226 Difference]: Without dead ends: 283 [2020-10-27 01:47:46,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:47:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-27 01:47:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 264. [2020-10-27 01:47:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 01:47:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 362 transitions. [2020-10-27 01:47:46,840 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 362 transitions. Word has length 30 [2020-10-27 01:47:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:46,840 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 362 transitions. [2020-10-27 01:47:46,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:47:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 362 transitions. [2020-10-27 01:47:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:47:46,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:46,841 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:46,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:47:46,841 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:46,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2022916003, now seen corresponding path program 12 times [2020-10-27 01:47:46,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:46,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457841239] [2020-10-27 01:47:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:46,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:46,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:47,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:48,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:48,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:47:48,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:47:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1432 [2020-10-27 01:47:48,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:47:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:47:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:47:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:48,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:48,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:48,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:48,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:48,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:48,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:48,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:48,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:48,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:48,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:48,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:47:48,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457841239] [2020-10-27 01:47:48,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:48,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:47:48,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116643209] [2020-10-27 01:47:48,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:47:48,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:48,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:47:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:47:48,470 INFO L87 Difference]: Start difference. First operand 264 states and 362 transitions. Second operand 10 states. [2020-10-27 01:47:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:51,618 INFO L93 Difference]: Finished difference Result 303 states and 425 transitions. [2020-10-27 01:47:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:47:51,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:47:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:51,621 INFO L225 Difference]: With dead ends: 303 [2020-10-27 01:47:51,621 INFO L226 Difference]: Without dead ends: 291 [2020-10-27 01:47:51,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:47:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-27 01:47:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 270. [2020-10-27 01:47:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-27 01:47:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 368 transitions. [2020-10-27 01:47:51,661 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 368 transitions. Word has length 30 [2020-10-27 01:47:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:51,661 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 368 transitions. [2020-10-27 01:47:51,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:47:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 368 transitions. [2020-10-27 01:47:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:47:51,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:51,663 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:51,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:47:51,663 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1422469348, now seen corresponding path program 13 times [2020-10-27 01:47:51,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:51,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631378007] [2020-10-27 01:47:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:51,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:51,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:51,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:51,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:52,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:54,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:54,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:47:54,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:47:54,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2344 [2020-10-27 01:47:54,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:47:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:47:54,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:54,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:54,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:54,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:54,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:54,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:54,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:47:54,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:54,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:47:54,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631378007] [2020-10-27 01:47:54,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:54,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:47:54,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398040025] [2020-10-27 01:47:54,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:47:54,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:54,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:47:54,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:47:54,366 INFO L87 Difference]: Start difference. First operand 270 states and 368 transitions. Second operand 17 states. [2020-10-27 01:47:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:56,987 INFO L93 Difference]: Finished difference Result 402 states and 552 transitions. [2020-10-27 01:47:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:47:56,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-27 01:47:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:56,990 INFO L225 Difference]: With dead ends: 402 [2020-10-27 01:47:56,990 INFO L226 Difference]: Without dead ends: 387 [2020-10-27 01:47:56,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:47:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-27 01:47:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 284. [2020-10-27 01:47:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 01:47:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 389 transitions. [2020-10-27 01:47:57,027 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 389 transitions. Word has length 30 [2020-10-27 01:47:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:57,027 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 389 transitions. [2020-10-27 01:47:57,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:47:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 389 transitions. [2020-10-27 01:47:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:47:57,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:57,029 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:57,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:47:57,029 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash 76863794, now seen corresponding path program 13 times [2020-10-27 01:47:57,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:57,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543821394] [2020-10-27 01:47:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:57,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:57,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:58,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:47:58,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:47:58,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1561 [2020-10-27 01:47:58,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:47:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:47:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:47:58,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:58,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:47:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:58,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:47:58,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:47:58,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:47:58,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:47:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:47:58,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:47:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:47:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:47:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:47:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:47:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:47:58,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543821394] [2020-10-27 01:47:58,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:47:58,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:47:58,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847276482] [2020-10-27 01:47:58,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:47:58,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:47:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:47:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:47:58,809 INFO L87 Difference]: Start difference. First operand 284 states and 389 transitions. Second operand 12 states. [2020-10-27 01:47:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:47:59,859 INFO L93 Difference]: Finished difference Result 309 states and 422 transitions. [2020-10-27 01:47:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:47:59,860 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 01:47:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:47:59,862 INFO L225 Difference]: With dead ends: 309 [2020-10-27 01:47:59,862 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 01:47:59,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:47:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 01:47:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 276. [2020-10-27 01:47:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-27 01:47:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 380 transitions. [2020-10-27 01:47:59,908 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 380 transitions. Word has length 31 [2020-10-27 01:47:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:47:59,909 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 380 transitions. [2020-10-27 01:47:59,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:47:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 380 transitions. [2020-10-27 01:47:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:47:59,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:47:59,910 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:47:59,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:47:59,910 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:47:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:47:59,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1981699521, now seen corresponding path program 8 times [2020-10-27 01:47:59,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:47:59,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229546898] [2020-10-27 01:47:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:47:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:47:59,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:00,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:00,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:00,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:01,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:04,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:04,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:48:04,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:04,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:48:04,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:04,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:04,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:04,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:48:04,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:05,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:05,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:05,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:05,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:05,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:05,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:05,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:05,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:05,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:05,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:48:05,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229546898] [2020-10-27 01:48:05,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:05,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:48:05,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500266536] [2020-10-27 01:48:05,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:48:05,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:48:05,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:05,179 INFO L87 Difference]: Start difference. First operand 276 states and 380 transitions. Second operand 13 states. [2020-10-27 01:48:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:07,418 INFO L93 Difference]: Finished difference Result 304 states and 421 transitions. [2020-10-27 01:48:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:48:07,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 01:48:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:07,420 INFO L225 Difference]: With dead ends: 304 [2020-10-27 01:48:07,421 INFO L226 Difference]: Without dead ends: 275 [2020-10-27 01:48:07,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:48:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-27 01:48:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 264. [2020-10-27 01:48:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 01:48:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 358 transitions. [2020-10-27 01:48:07,455 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 358 transitions. Word has length 31 [2020-10-27 01:48:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:07,456 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 358 transitions. [2020-10-27 01:48:07,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:48:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 358 transitions. [2020-10-27 01:48:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:48:07,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:07,457 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:07,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:48:07,457 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:07,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:07,458 INFO L82 PathProgramCache]: Analyzing trace with hash 923596064, now seen corresponding path program 14 times [2020-10-27 01:48:07,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:07,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728305159] [2020-10-27 01:48:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:07,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:07,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:07,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:08,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:09,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:09,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:48:09,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:48:09,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1956 [2020-10-27 01:48:09,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:48:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:48:09,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:09,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:09,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:09,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:48:09,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728305159] [2020-10-27 01:48:09,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:09,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:48:09,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311750417] [2020-10-27 01:48:09,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:48:09,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:48:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:48:09,714 INFO L87 Difference]: Start difference. First operand 264 states and 358 transitions. Second operand 15 states. [2020-10-27 01:48:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:11,026 INFO L93 Difference]: Finished difference Result 335 states and 444 transitions. [2020-10-27 01:48:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:48:11,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-27 01:48:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:11,029 INFO L225 Difference]: With dead ends: 335 [2020-10-27 01:48:11,029 INFO L226 Difference]: Without dead ends: 319 [2020-10-27 01:48:11,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-27 01:48:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 264. [2020-10-27 01:48:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 01:48:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 357 transitions. [2020-10-27 01:48:11,058 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 357 transitions. Word has length 31 [2020-10-27 01:48:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:11,058 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 357 transitions. [2020-10-27 01:48:11,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:48:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 357 transitions. [2020-10-27 01:48:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:48:11,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:11,060 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:11,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:48:11,060 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1404394638, now seen corresponding path program 15 times [2020-10-27 01:48:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:11,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007717556] [2020-10-27 01:48:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:11,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:11,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:11,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:11,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:11,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:12,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:48:12,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:48:12,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1503 [2020-10-27 01:48:12,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:12,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:48:12,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:12,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:48:12,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:12,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:12,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:12,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:48:12,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007717556] [2020-10-27 01:48:12,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:12,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:48:12,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200797491] [2020-10-27 01:48:12,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:48:12,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:12,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:48:12,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:12,956 INFO L87 Difference]: Start difference. First operand 264 states and 357 transitions. Second operand 17 states. [2020-10-27 01:48:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:14,403 INFO L93 Difference]: Finished difference Result 358 states and 470 transitions. [2020-10-27 01:48:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:48:14,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-27 01:48:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:14,406 INFO L225 Difference]: With dead ends: 358 [2020-10-27 01:48:14,406 INFO L226 Difference]: Without dead ends: 342 [2020-10-27 01:48:14,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-27 01:48:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 264. [2020-10-27 01:48:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 01:48:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 356 transitions. [2020-10-27 01:48:14,441 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 356 transitions. Word has length 31 [2020-10-27 01:48:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:14,441 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 356 transitions. [2020-10-27 01:48:14,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:48:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 356 transitions. [2020-10-27 01:48:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:48:14,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:14,442 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:14,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:48:14,442 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:14,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1202396448, now seen corresponding path program 3 times [2020-10-27 01:48:14,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:14,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257952223] [2020-10-27 01:48:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:14,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:14,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:15,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:17,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:17,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:48:17,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:48:17,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3017 [2020-10-27 01:48:17,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:48:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:17,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:48:17,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:17,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:17,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:17,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:17,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:17,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:17,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:17,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:17,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:17,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257952223] [2020-10-27 01:48:17,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:17,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:48:17,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458917669] [2020-10-27 01:48:17,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:48:17,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:48:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:48:17,909 INFO L87 Difference]: Start difference. First operand 264 states and 356 transitions. Second operand 19 states. [2020-10-27 01:48:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:19,550 INFO L93 Difference]: Finished difference Result 382 states and 497 transitions. [2020-10-27 01:48:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:48:19,550 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-10-27 01:48:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:19,551 INFO L225 Difference]: With dead ends: 382 [2020-10-27 01:48:19,552 INFO L226 Difference]: Without dead ends: 366 [2020-10-27 01:48:19,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:48:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-27 01:48:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 264. [2020-10-27 01:48:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-27 01:48:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 355 transitions. [2020-10-27 01:48:19,588 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 355 transitions. Word has length 31 [2020-10-27 01:48:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:19,588 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 355 transitions. [2020-10-27 01:48:19,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:48:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 355 transitions. [2020-10-27 01:48:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:48:19,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:19,589 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:19,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:48:19,589 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:19,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:19,590 INFO L82 PathProgramCache]: Analyzing trace with hash -489747598, now seen corresponding path program 14 times [2020-10-27 01:48:19,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:19,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201496420] [2020-10-27 01:48:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:19,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:21,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:21,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:48:21,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:21,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2233 [2020-10-27 01:48:21,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:48:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:48:21,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:22,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:22,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:22,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201496420] [2020-10-27 01:48:22,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:22,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:48:22,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931937796] [2020-10-27 01:48:22,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:48:22,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:22,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:48:22,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:48:22,246 INFO L87 Difference]: Start difference. First operand 264 states and 355 transitions. Second operand 19 states. [2020-10-27 01:48:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:25,369 INFO L93 Difference]: Finished difference Result 545 states and 804 transitions. [2020-10-27 01:48:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:48:25,372 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-10-27 01:48:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:25,374 INFO L225 Difference]: With dead ends: 545 [2020-10-27 01:48:25,374 INFO L226 Difference]: Without dead ends: 503 [2020-10-27 01:48:25,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:48:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-10-27 01:48:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 281. [2020-10-27 01:48:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-27 01:48:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2020-10-27 01:48:25,402 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 31 [2020-10-27 01:48:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:25,402 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2020-10-27 01:48:25,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:48:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2020-10-27 01:48:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:48:25,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:25,404 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:25,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:48:25,404 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:25,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:25,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1426083053, now seen corresponding path program 5 times [2020-10-27 01:48:25,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:25,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704114885] [2020-10-27 01:48:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:25,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:25,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:26,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:30,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:30,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:48:30,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:48:30,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:48:30,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:30,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:48:30,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:30,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:48:30,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:30,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:30,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:30,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:30,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:30,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:30,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:30,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:30,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:30,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:30,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:30,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:48:30,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704114885] [2020-10-27 01:48:30,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:30,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:48:30,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811446032] [2020-10-27 01:48:30,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:48:30,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:30,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:48:30,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:48:30,616 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand 12 states. [2020-10-27 01:48:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:31,479 INFO L93 Difference]: Finished difference Result 341 states and 452 transitions. [2020-10-27 01:48:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:48:31,480 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:48:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:31,482 INFO L225 Difference]: With dead ends: 341 [2020-10-27 01:48:31,482 INFO L226 Difference]: Without dead ends: 335 [2020-10-27 01:48:31,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:48:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-27 01:48:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 317. [2020-10-27 01:48:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-27 01:48:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 425 transitions. [2020-10-27 01:48:31,520 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 425 transitions. Word has length 32 [2020-10-27 01:48:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:31,520 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 425 transitions. [2020-10-27 01:48:31,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:48:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 425 transitions. [2020-10-27 01:48:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:48:31,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:31,522 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:31,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:48:31,522 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:31,522 INFO L82 PathProgramCache]: Analyzing trace with hash 361069220, now seen corresponding path program 15 times [2020-10-27 01:48:31,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:31,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151696022] [2020-10-27 01:48:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:31,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:31,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:31,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:31,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:33,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:48:33,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:48:33,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2126 [2020-10-27 01:48:33,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:33,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:48:33,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:33,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:48:33,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:34,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:34,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:34,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:34,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:34,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:34,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:34,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:34,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151696022] [2020-10-27 01:48:34,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:34,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:48:34,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465185235] [2020-10-27 01:48:34,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:48:34,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:34,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:48:34,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:48:34,153 INFO L87 Difference]: Start difference. First operand 317 states and 425 transitions. Second operand 20 states. [2020-10-27 01:48:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:37,627 INFO L93 Difference]: Finished difference Result 591 states and 853 transitions. [2020-10-27 01:48:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:48:37,627 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-10-27 01:48:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:37,631 INFO L225 Difference]: With dead ends: 591 [2020-10-27 01:48:37,631 INFO L226 Difference]: Without dead ends: 549 [2020-10-27 01:48:37,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:48:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-27 01:48:37,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 330. [2020-10-27 01:48:37,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-27 01:48:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 444 transitions. [2020-10-27 01:48:37,670 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 444 transitions. Word has length 32 [2020-10-27 01:48:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:37,671 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 444 transitions. [2020-10-27 01:48:37,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:48:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 444 transitions. [2020-10-27 01:48:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:48:37,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:37,672 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:37,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:48:37,672 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:37,673 INFO L82 PathProgramCache]: Analyzing trace with hash -961983151, now seen corresponding path program 3 times [2020-10-27 01:48:37,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:37,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992945587] [2020-10-27 01:48:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:37,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:37,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:37,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:48:37,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:37,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 01:48:37,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:48:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:48:37,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:48:37,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:37,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:37,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:37,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:37,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:37,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:37,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:37,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:37,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:37,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:37,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 01:48:37,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992945587] [2020-10-27 01:48:37,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:37,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:48:37,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749508313] [2020-10-27 01:48:37,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:48:37,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:37,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:48:37,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:48:37,947 INFO L87 Difference]: Start difference. First operand 330 states and 444 transitions. Second operand 7 states. [2020-10-27 01:48:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:38,326 INFO L93 Difference]: Finished difference Result 366 states and 494 transitions. [2020-10-27 01:48:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:48:38,327 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-27 01:48:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:38,328 INFO L225 Difference]: With dead ends: 366 [2020-10-27 01:48:38,328 INFO L226 Difference]: Without dead ends: 329 [2020-10-27 01:48:38,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:48:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-27 01:48:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 320. [2020-10-27 01:48:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-27 01:48:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 432 transitions. [2020-10-27 01:48:38,358 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 432 transitions. Word has length 33 [2020-10-27 01:48:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:38,358 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 432 transitions. [2020-10-27 01:48:38,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:48:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 432 transitions. [2020-10-27 01:48:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:48:38,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:38,359 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:38,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:48:38,359 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1850598174, now seen corresponding path program 16 times [2020-10-27 01:48:38,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:38,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287758901] [2020-10-27 01:48:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:38,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2369 [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:48:40,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:40,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:40,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:40,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:40,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:40,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:40,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:40,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:40,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:40,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-27 01:48:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:48:40,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287758901] [2020-10-27 01:48:40,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:40,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:48:40,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658102611] [2020-10-27 01:48:40,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:48:40,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:40,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:48:40,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:40,984 INFO L87 Difference]: Start difference. First operand 320 states and 432 transitions. Second operand 13 states. [2020-10-27 01:48:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:42,186 INFO L93 Difference]: Finished difference Result 343 states and 459 transitions. [2020-10-27 01:48:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:48:42,186 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:48:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:42,189 INFO L225 Difference]: With dead ends: 343 [2020-10-27 01:48:42,189 INFO L226 Difference]: Without dead ends: 322 [2020-10-27 01:48:42,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:48:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-27 01:48:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 310. [2020-10-27 01:48:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-27 01:48:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 421 transitions. [2020-10-27 01:48:42,227 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 421 transitions. Word has length 33 [2020-10-27 01:48:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:42,227 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 421 transitions. [2020-10-27 01:48:42,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:48:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 421 transitions. [2020-10-27 01:48:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:48:42,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:42,229 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:42,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:48:42,229 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash -189564495, now seen corresponding path program 9 times [2020-10-27 01:48:42,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:42,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207552502] [2020-10-27 01:48:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:42,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:42,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:42,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:42,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2760 [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:48:45,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:45,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:45,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:45,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:45,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:45,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:45,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:45,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:45,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:48:45,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207552502] [2020-10-27 01:48:45,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:45,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:48:45,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733801575] [2020-10-27 01:48:45,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:48:45,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:45,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:48:45,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:48:45,154 INFO L87 Difference]: Start difference. First operand 310 states and 421 transitions. Second operand 9 states. [2020-10-27 01:48:45,974 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-27 01:48:46,333 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 01:48:50,562 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-27 01:48:51,013 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 01:48:51,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:51,363 INFO L93 Difference]: Finished difference Result 395 states and 554 transitions. [2020-10-27 01:48:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:48:51,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 01:48:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:51,366 INFO L225 Difference]: With dead ends: 395 [2020-10-27 01:48:51,366 INFO L226 Difference]: Without dead ends: 386 [2020-10-27 01:48:51,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:48:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-27 01:48:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 349. [2020-10-27 01:48:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-27 01:48:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 476 transitions. [2020-10-27 01:48:51,410 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 476 transitions. Word has length 33 [2020-10-27 01:48:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:51,410 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 476 transitions. [2020-10-27 01:48:51,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:48:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 476 transitions. [2020-10-27 01:48:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:48:51,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:51,411 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:51,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:48:51,412 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:51,412 INFO L82 PathProgramCache]: Analyzing trace with hash 348442914, now seen corresponding path program 17 times [2020-10-27 01:48:51,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:51,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386956251] [2020-10-27 01:48:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:51,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:51,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:51,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:51,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:53,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:53,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:48:53,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:48:53,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2355 [2020-10-27 01:48:53,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:48:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:48:53,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:54,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:54,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:54,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:54,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:54,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:54,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:48:54,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:54,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:48:54,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386956251] [2020-10-27 01:48:54,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:54,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:48:54,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983046070] [2020-10-27 01:48:54,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:48:54,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:54,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:48:54,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:54,193 INFO L87 Difference]: Start difference. First operand 349 states and 476 transitions. Second operand 13 states. [2020-10-27 01:48:55,234 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-27 01:49:00,533 WARN L193 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-27 01:49:03,024 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-27 01:49:07,647 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-27 01:49:08,080 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-27 01:49:15,963 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-27 01:49:17,544 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-27 01:49:17,904 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 01:49:23,303 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-27 01:49:24,110 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-27 01:49:24,429 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-27 01:49:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:24,501 INFO L93 Difference]: Finished difference Result 405 states and 564 transitions. [2020-10-27 01:49:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:49:24,502 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:49:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:24,504 INFO L225 Difference]: With dead ends: 405 [2020-10-27 01:49:24,504 INFO L226 Difference]: Without dead ends: 392 [2020-10-27 01:49:24,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:49:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-27 01:49:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 365. [2020-10-27 01:49:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 01:49:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 500 transitions. [2020-10-27 01:49:24,539 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 500 transitions. Word has length 33 [2020-10-27 01:49:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:24,539 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 500 transitions. [2020-10-27 01:49:24,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:49:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 500 transitions. [2020-10-27 01:49:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:49:24,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:24,540 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:24,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:49:24,540 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash -259658062, now seen corresponding path program 18 times [2020-10-27 01:49:24,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:24,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784514796] [2020-10-27 01:49:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:24,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:25,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:27,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:27,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:49:27,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:49:27,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2641 [2020-10-27 01:49:27,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:49:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:27,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:49:27,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:27,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:27,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:27,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:27,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:27,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:27,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:27,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:27,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:49:27,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784514796] [2020-10-27 01:49:27,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:27,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:49:27,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919118907] [2020-10-27 01:49:27,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:49:27,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:49:27,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:49:27,594 INFO L87 Difference]: Start difference. First operand 365 states and 500 transitions. Second operand 17 states. [2020-10-27 01:49:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:29,353 INFO L93 Difference]: Finished difference Result 457 states and 610 transitions. [2020-10-27 01:49:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:49:29,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-27 01:49:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:29,357 INFO L225 Difference]: With dead ends: 457 [2020-10-27 01:49:29,357 INFO L226 Difference]: Without dead ends: 440 [2020-10-27 01:49:29,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:49:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-27 01:49:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 365. [2020-10-27 01:49:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 01:49:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 499 transitions. [2020-10-27 01:49:29,408 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 499 transitions. Word has length 33 [2020-10-27 01:49:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:29,408 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 499 transitions. [2020-10-27 01:49:29,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:49:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 499 transitions. [2020-10-27 01:49:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:49:29,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:29,410 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:29,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:49:29,410 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1039621406, now seen corresponding path program 19 times [2020-10-27 01:49:29,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:29,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081814828] [2020-10-27 01:49:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:30,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:31,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:31,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:49:31,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:49:31,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1998 [2020-10-27 01:49:31,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:49:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:49:31,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:31,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:31,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:31,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:31,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:31,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:31,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:31,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:31,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-27 01:49:31,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081814828] [2020-10-27 01:49:31,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:31,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:49:31,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958861533] [2020-10-27 01:49:31,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:49:31,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:31,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:49:31,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:49:31,669 INFO L87 Difference]: Start difference. First operand 365 states and 499 transitions. Second operand 13 states. [2020-10-27 01:49:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:33,030 INFO L93 Difference]: Finished difference Result 481 states and 636 transitions. [2020-10-27 01:49:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:49:33,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:49:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:33,034 INFO L225 Difference]: With dead ends: 481 [2020-10-27 01:49:33,034 INFO L226 Difference]: Without dead ends: 464 [2020-10-27 01:49:33,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:49:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-10-27 01:49:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 365. [2020-10-27 01:49:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 01:49:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 498 transitions. [2020-10-27 01:49:33,071 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 498 transitions. Word has length 33 [2020-10-27 01:49:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:33,072 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 498 transitions. [2020-10-27 01:49:33,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:49:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 498 transitions. [2020-10-27 01:49:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:49:33,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:33,073 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:33,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:49:33,073 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:33,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1203328846, now seen corresponding path program 4 times [2020-10-27 01:49:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:33,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128057517] [2020-10-27 01:49:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:33,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:34,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3781 [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:49:36,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:37,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:37,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:37,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:37,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128057517] [2020-10-27 01:49:37,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:37,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:49:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602769938] [2020-10-27 01:49:37,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:49:37,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:49:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:49:37,410 INFO L87 Difference]: Start difference. First operand 365 states and 498 transitions. Second operand 21 states. [2020-10-27 01:49:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:39,463 INFO L93 Difference]: Finished difference Result 506 states and 663 transitions. [2020-10-27 01:49:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:49:39,464 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-10-27 01:49:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:39,466 INFO L225 Difference]: With dead ends: 506 [2020-10-27 01:49:39,466 INFO L226 Difference]: Without dead ends: 489 [2020-10-27 01:49:39,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:49:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-10-27 01:49:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 365. [2020-10-27 01:49:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 01:49:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 497 transitions. [2020-10-27 01:49:39,512 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 497 transitions. Word has length 33 [2020-10-27 01:49:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:39,513 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 497 transitions. [2020-10-27 01:49:39,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:49:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 497 transitions. [2020-10-27 01:49:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:49:39,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:39,514 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:39,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:49:39,514 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:39,515 INFO L82 PathProgramCache]: Analyzing trace with hash 966586802, now seen corresponding path program 16 times [2020-10-27 01:49:39,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:39,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338887860] [2020-10-27 01:49:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:40,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:40,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:42,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:42,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:49:42,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:49:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2630 [2020-10-27 01:49:42,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:49:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:49:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:42,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:42,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:42,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:42,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:42,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:42,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:42,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:42,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:42,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:42,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338887860] [2020-10-27 01:49:42,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:42,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:49:42,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995994212] [2020-10-27 01:49:42,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:49:42,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:49:42,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:49:42,680 INFO L87 Difference]: Start difference. First operand 365 states and 497 transitions. Second operand 21 states. [2020-10-27 01:49:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:46,704 INFO L93 Difference]: Finished difference Result 677 states and 986 transitions. [2020-10-27 01:49:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:49:46,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-10-27 01:49:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:46,708 INFO L225 Difference]: With dead ends: 677 [2020-10-27 01:49:46,708 INFO L226 Difference]: Without dead ends: 619 [2020-10-27 01:49:46,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:49:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-10-27 01:49:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 380. [2020-10-27 01:49:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-27 01:49:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 519 transitions. [2020-10-27 01:49:46,755 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 519 transitions. Word has length 33 [2020-10-27 01:49:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:46,755 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 519 transitions. [2020-10-27 01:49:46,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:49:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 519 transitions. [2020-10-27 01:49:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:49:46,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:46,756 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:46,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:49:46,757 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:46,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:46,757 INFO L82 PathProgramCache]: Analyzing trace with hash -475826957, now seen corresponding path program 20 times [2020-10-27 01:49:46,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:46,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743991341] [2020-10-27 01:49:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:46,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:46,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:46,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:49,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:49,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:49:49,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:49:49,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2276 [2020-10-27 01:49:49,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:49:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:49:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:49:49,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:49,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:49,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:49,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 01:49:49,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743991341] [2020-10-27 01:49:49,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:49,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:49:49,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536715202] [2020-10-27 01:49:49,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:49:49,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:49,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:49:49,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:49:49,230 INFO L87 Difference]: Start difference. First operand 380 states and 519 transitions. Second operand 9 states. [2020-10-27 01:49:52,690 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-27 01:49:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:53,089 INFO L93 Difference]: Finished difference Result 409 states and 559 transitions. [2020-10-27 01:49:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:49:53,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 01:49:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:53,092 INFO L225 Difference]: With dead ends: 409 [2020-10-27 01:49:53,092 INFO L226 Difference]: Without dead ends: 398 [2020-10-27 01:49:53,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:49:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-27 01:49:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 380. [2020-10-27 01:49:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-27 01:49:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 515 transitions. [2020-10-27 01:49:53,143 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 515 transitions. Word has length 34 [2020-10-27 01:49:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:53,144 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 515 transitions. [2020-10-27 01:49:53,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:49:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 515 transitions. [2020-10-27 01:49:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:49:53,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:53,145 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:53,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:49:53,145 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:53,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1470804772, now seen corresponding path program 10 times [2020-10-27 01:49:53,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:53,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889841303] [2020-10-27 01:49:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:53,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:53,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:53,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:54,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:49:58,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:58,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:58,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:58,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:58,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:58,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:58,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:58,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:58,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:58,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:58,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:49:58,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889841303] [2020-10-27 01:49:58,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:58,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:49:58,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269419320] [2020-10-27 01:49:58,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:49:58,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:49:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:49:58,480 INFO L87 Difference]: Start difference. First operand 380 states and 515 transitions. Second operand 15 states. [2020-10-27 01:50:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:01,836 INFO L93 Difference]: Finished difference Result 415 states and 568 transitions. [2020-10-27 01:50:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:50:01,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 01:50:01,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:01,840 INFO L225 Difference]: With dead ends: 415 [2020-10-27 01:50:01,840 INFO L226 Difference]: Without dead ends: 372 [2020-10-27 01:50:01,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=292, Invalid=3014, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:50:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-27 01:50:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 355. [2020-10-27 01:50:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-27 01:50:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 477 transitions. [2020-10-27 01:50:01,883 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 477 transitions. Word has length 34 [2020-10-27 01:50:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:01,884 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 477 transitions. [2020-10-27 01:50:01,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:50:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 477 transitions. [2020-10-27 01:50:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:50:01,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:01,885 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:01,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:50:01,885 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:01,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1737204636, now seen corresponding path program 17 times [2020-10-27 01:50:01,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:01,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34314757] [2020-10-27 01:50:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:01,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:01,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:02,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:02,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:03,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking...