/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:44:16,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:44:16,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:44:16,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:44:16,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:44:16,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:44:16,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:44:16,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:44:16,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:44:16,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:44:16,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:44:16,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:44:16,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:44:16,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:44:16,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:44:16,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:44:16,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:44:16,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:44:16,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:44:16,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:44:16,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:44:16,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:44:16,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:44:16,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:44:16,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:44:16,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:44:16,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:44:16,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:44:16,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:44:16,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:44:16,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:44:16,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:44:16,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:44:16,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:44:16,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:44:16,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:44:16,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:44:16,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:44:16,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:44:16,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:44:16,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:44:16,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:44:16,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:44:16,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:44:16,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:44:16,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:44:16,296 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:44:16,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:44:16,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:44:16,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:44:16,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:44:16,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:44:16,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:44:16,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:44:16,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:44:16,298 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:44:16,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:44:16,299 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:44:16,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:44:16,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:44:16,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:44:16,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:44:16,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:44:16,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:44:16,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:44:16,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:44:16,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:44:16,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:44:16,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:44:16,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:44:16,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:44:16,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:44:16,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:44:16,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:44:16,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:44:16,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:44:16,866 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:44:16,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label39.c [2020-10-26 23:44:16,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2562d5fdc/c969d8a326bf49a99aec4cc58b33efac/FLAGedc9b3e58 [2020-10-26 23:44:17,823 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:44:17,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label39.c [2020-10-26 23:44:17,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2562d5fdc/c969d8a326bf49a99aec4cc58b33efac/FLAGedc9b3e58 [2020-10-26 23:44:17,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2562d5fdc/c969d8a326bf49a99aec4cc58b33efac [2020-10-26 23:44:17,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:44:17,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:44:17,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:44:17,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:44:17,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:44:17,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:44:17" (1/1) ... [2020-10-26 23:44:17,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179c13ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:17, skipping insertion in model container [2020-10-26 23:44:17,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:44:17" (1/1) ... [2020-10-26 23:44:18,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:44:18,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:44:19,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:44:19,267 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:44:19,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:44:19,756 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:44:19,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19 WrapperNode [2020-10-26 23:44:19,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:44:19,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:44:19,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:44:19,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:44:19,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:19,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:19,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:19,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:19,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:20,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:20,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:20,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:44:20,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:44:20,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:44:20,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:44:20,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:44:20,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:44:20,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:44:20,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:44:20,173 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:44:20,173 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:44:20,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:44:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:44:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:44:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:44:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:44:20,176 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:44:20,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:44:20,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:44:20,177 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:44:20,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:44:20,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:44:20,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:44:20,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:44:20,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:44:20,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:44:20,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:44:24,504 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:44:24,504 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:44:24,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:44:24 BoogieIcfgContainer [2020-10-26 23:44:24,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:44:24,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:44:24,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:44:24,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:44:24,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:44:17" (1/3) ... [2020-10-26 23:44:24,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26397d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:44:24, skipping insertion in model container [2020-10-26 23:44:24,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19" (2/3) ... [2020-10-26 23:44:24,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26397d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:44:24, skipping insertion in model container [2020-10-26 23:44:24,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:44:24" (3/3) ... [2020-10-26 23:44:24,520 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label39.c [2020-10-26 23:44:24,536 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:44:24,544 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:44:24,561 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:44:24,601 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:44:24,601 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:44:24,601 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:44:24,601 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:44:24,602 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:44:24,602 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:44:24,602 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:44:24,602 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:44:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:44:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 23:44:24,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:44:24,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:44:24,644 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:44:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:44:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash -23789063, now seen corresponding path program 1 times [2020-10-26 23:44:24,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:44:24,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231777756] [2020-10-26 23:44:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:44:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:24,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:25,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:25,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 23:44:25,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:25,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-26 23:44:25,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:25,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:44:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:44:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 23:44:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:44:25,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:44:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:25,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:25,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:25,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:44:25,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:25,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 23:44:25,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:44:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:44:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:44:25,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:44:25,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231777756] [2020-10-26 23:44:25,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:44:25,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:44:25,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879346441] [2020-10-26 23:44:25,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:44:25,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:44:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:44:25,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:44:25,634 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:44:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:44:34,749 INFO L93 Difference]: Finished difference Result 1229 states and 2206 transitions. [2020-10-26 23:44:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:44:34,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-26 23:44:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:44:34,774 INFO L225 Difference]: With dead ends: 1229 [2020-10-26 23:44:34,775 INFO L226 Difference]: Without dead ends: 709 [2020-10-26 23:44:34,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:44:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-26 23:44:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 695. [2020-10-26 23:44:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-26 23:44:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1081 transitions. [2020-10-26 23:44:34,906 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1081 transitions. Word has length 18 [2020-10-26 23:44:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:44:34,907 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1081 transitions. [2020-10-26 23:44:34,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:44:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1081 transitions. [2020-10-26 23:44:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 23:44:34,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:44:34,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:44:34,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:44:34,913 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:44:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:44:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1746276014, now seen corresponding path program 1 times [2020-10-26 23:44:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:44:34,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279941184] [2020-10-26 23:44:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:44:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:34,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:35,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:35,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:35,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 23:44:35,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:44:35,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-26 23:44:35,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:35,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:44:35,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:44:35,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:44:35,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:44:36,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:44:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:36,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:36,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:36,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:44:36,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 23:44:36,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:44:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:44:36,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:44:36,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:44:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:44:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:36,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:36,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:36,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:44:36,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:36,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-26 23:44:36,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:44:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:44:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:44:36,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:44:36,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279941184] [2020-10-26 23:44:36,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:44:36,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:44:36,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644801283] [2020-10-26 23:44:36,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:44:36,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:44:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:44:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:44:36,557 INFO L87 Difference]: Start difference. First operand 695 states and 1081 transitions. Second operand 7 states. [2020-10-26 23:44:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:44:49,183 INFO L93 Difference]: Finished difference Result 1722 states and 2740 transitions. [2020-10-26 23:44:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:44:49,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-10-26 23:44:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:44:49,198 INFO L225 Difference]: With dead ends: 1722 [2020-10-26 23:44:49,200 INFO L226 Difference]: Without dead ends: 1033 [2020-10-26 23:44:49,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:44:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-26 23:44:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 999. [2020-10-26 23:44:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2020-10-26 23:44:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1350 transitions. [2020-10-26 23:44:49,298 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1350 transitions. Word has length 88 [2020-10-26 23:44:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:44:49,299 INFO L481 AbstractCegarLoop]: Abstraction has 999 states and 1350 transitions. [2020-10-26 23:44:49,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:44:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1350 transitions. [2020-10-26 23:44:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 23:44:49,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:44:49,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:44:49,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:44:49,310 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:44:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:44:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1867527030, now seen corresponding path program 1 times [2020-10-26 23:44:49,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:44:49,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558959861] [2020-10-26 23:44:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:44:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:49,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:49,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:50,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:50,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 23:44:50,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:44:50,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-26 23:44:50,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:50,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:44:50,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:44:50,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:44:50,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:50,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:44:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:50,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:50,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:50,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:44:50,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:50,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 23:44:50,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:44:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:44:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:44:50,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:50,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:44:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:50,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:50,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:50,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 23:44:50,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:50,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-26 23:44:50,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:50,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:44:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:44:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:44:50,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:44:50,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558959861] [2020-10-26 23:44:50,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:44:50,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:44:50,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145572343] [2020-10-26 23:44:50,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:44:50,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:44:50,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:44:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:44:50,993 INFO L87 Difference]: Start difference. First operand 999 states and 1350 transitions. Second operand 7 states. [2020-10-26 23:45:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:45:01,102 INFO L93 Difference]: Finished difference Result 2360 states and 3346 transitions. [2020-10-26 23:45:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:45:01,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-26 23:45:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:45:01,114 INFO L225 Difference]: With dead ends: 2360 [2020-10-26 23:45:01,114 INFO L226 Difference]: Without dead ends: 1674 [2020-10-26 23:45:01,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:45:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2020-10-26 23:45:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1638. [2020-10-26 23:45:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1638 states. [2020-10-26 23:45:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2043 transitions. [2020-10-26 23:45:01,182 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2043 transitions. Word has length 92 [2020-10-26 23:45:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:45:01,185 INFO L481 AbstractCegarLoop]: Abstraction has 1638 states and 2043 transitions. [2020-10-26 23:45:01,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:45:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2043 transitions. [2020-10-26 23:45:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 23:45:01,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:45:01,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:45:01,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:45:01,194 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:45:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:45:01,195 INFO L82 PathProgramCache]: Analyzing trace with hash 671225388, now seen corresponding path program 1 times [2020-10-26 23:45:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:45:01,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834138472] [2020-10-26 23:45:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:45:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:01,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:01,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:01,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 23:45:01,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:01,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-26 23:45:01,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:45:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:45:01,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 23:45:01,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:01,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:45:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:01,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:01,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:45:01,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:01,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:45:01,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:01,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:45:01,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:01,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:45:01,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:01,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:45:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:01,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:01,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:01,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:45:01,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 23:45:01,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:45:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:45:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:45:01,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834138472] [2020-10-26 23:45:01,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:45:01,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:45:01,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171749624] [2020-10-26 23:45:01,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:45:01,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:45:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:45:01,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:45:01,920 INFO L87 Difference]: Start difference. First operand 1638 states and 2043 transitions. Second operand 5 states. [2020-10-26 23:45:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:45:12,683 INFO L93 Difference]: Finished difference Result 3918 states and 5051 transitions. [2020-10-26 23:45:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:45:12,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2020-10-26 23:45:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:45:12,700 INFO L225 Difference]: With dead ends: 3918 [2020-10-26 23:45:12,700 INFO L226 Difference]: Without dead ends: 2279 [2020-10-26 23:45:12,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:45:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2020-10-26 23:45:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277. [2020-10-26 23:45:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2020-10-26 23:45:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 2732 transitions. [2020-10-26 23:45:12,839 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 2732 transitions. Word has length 113 [2020-10-26 23:45:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:45:12,839 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 2732 transitions. [2020-10-26 23:45:12,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:45:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 2732 transitions. [2020-10-26 23:45:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 23:45:12,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:45:12,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:45:12,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:45:12,851 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:45:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:45:12,851 INFO L82 PathProgramCache]: Analyzing trace with hash -799914161, now seen corresponding path program 1 times [2020-10-26 23:45:12,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:45:12,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827247414] [2020-10-26 23:45:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:45:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:12,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:13,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:13,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:15,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:15,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-26 23:45:15,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:45:15,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2399 [2020-10-26 23:45:15,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:15,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:45:15,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:45:15,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-26 23:45:15,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:15,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:45:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:15,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:15,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:45:15,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:15,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:45:15,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:15,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:45:15,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:15,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:45:15,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:15,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:45:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:15,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:15,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:15,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:45:15,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:15,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-26 23:45:15,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:15,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:45:15,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:45:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:45:15,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:45:16,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827247414] [2020-10-26 23:45:16,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:45:16,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:45:16,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265790212] [2020-10-26 23:45:16,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:45:16,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:45:16,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:45:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:45:16,187 INFO L87 Difference]: Start difference. First operand 2277 states and 2732 transitions. Second operand 6 states. [2020-10-26 23:45:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:45:26,740 INFO L93 Difference]: Finished difference Result 2626 states and 3124 transitions. [2020-10-26 23:45:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:45:26,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 218 [2020-10-26 23:45:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:45:26,757 INFO L225 Difference]: With dead ends: 2626 [2020-10-26 23:45:26,757 INFO L226 Difference]: Without dead ends: 2623 [2020-10-26 23:45:26,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:45:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2623 states. [2020-10-26 23:45:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2623 to 2612. [2020-10-26 23:45:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2612 states. [2020-10-26 23:45:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 3109 transitions. [2020-10-26 23:45:26,847 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 3109 transitions. Word has length 218 [2020-10-26 23:45:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:45:26,848 INFO L481 AbstractCegarLoop]: Abstraction has 2612 states and 3109 transitions. [2020-10-26 23:45:26,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:45:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 3109 transitions. [2020-10-26 23:45:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-26 23:45:26,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:45:26,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:45:26,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:45:26,853 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:45:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:45:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash -158387553, now seen corresponding path program 1 times [2020-10-26 23:45:26,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:45:26,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220407127] [2020-10-26 23:45:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:45:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:28,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:28,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 23:45:28,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-26 23:45:28,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 23:45:28,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:45:28,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-26 23:45:28,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:28,408 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:45:28,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:45:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:28,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:28,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:28,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:45:28,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:28,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:45:28,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:45:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:45:28,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:28,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:45:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:28,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:29,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:29,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-26 23:45:29,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:29,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-26 23:45:29,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:45:29,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:45:29,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-26 23:45:29,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:45:29,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220407127] [2020-10-26 23:45:29,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:45:29,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:45:29,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287118500] [2020-10-26 23:45:29,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:45:29,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:45:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:45:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:45:29,644 INFO L87 Difference]: Start difference. First operand 2612 states and 3109 transitions. Second operand 8 states. [2020-10-26 23:45:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:45:42,513 INFO L93 Difference]: Finished difference Result 5879 states and 6989 transitions. [2020-10-26 23:45:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:45:42,520 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 255 [2020-10-26 23:45:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:45:42,540 INFO L225 Difference]: With dead ends: 5879 [2020-10-26 23:45:42,540 INFO L226 Difference]: Without dead ends: 3582 [2020-10-26 23:45:42,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:45:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2020-10-26 23:45:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3251. [2020-10-26 23:45:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3251 states. [2020-10-26 23:45:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 3830 transitions. [2020-10-26 23:45:42,673 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 3830 transitions. Word has length 255 [2020-10-26 23:45:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:45:42,674 INFO L481 AbstractCegarLoop]: Abstraction has 3251 states and 3830 transitions. [2020-10-26 23:45:42,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:45:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 3830 transitions. [2020-10-26 23:45:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-26 23:45:42,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:45:42,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:45:42,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:45:42,682 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:45:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:45:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 523250417, now seen corresponding path program 1 times [2020-10-26 23:45:42,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:45:42,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148977000] [2020-10-26 23:45:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:45:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:42,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:43,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:47,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:47,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-26 23:45:47,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:45:47,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 23:45:47,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:47,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:45:47,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:45:47,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:45:47,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:45:48,048 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:45:48,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:45:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:48,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:48,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:48,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:45:48,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:48,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 23:45:48,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:48,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:45:48,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:48,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:45:48,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:45:48,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:45:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:48,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:48,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:48,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:45:48,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:48,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-26 23:45:48,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:48,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:45:48,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:45:48,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:45:48,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:49,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 23:45:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:49,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:49,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:49,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:45:49,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:49,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 23:45:49,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:45:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-26 23:45:49,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:45:49,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:45:49,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148977000] [2020-10-26 23:45:49,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:45:49,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:45:49,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550069569] [2020-10-26 23:45:49,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:45:49,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:45:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:45:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:45:49,477 INFO L87 Difference]: Start difference. First operand 3251 states and 3830 transitions. Second operand 7 states. [2020-10-26 23:45:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:45:59,222 INFO L93 Difference]: Finished difference Result 6275 states and 7463 transitions. [2020-10-26 23:45:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:45:59,228 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 303 [2020-10-26 23:45:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:45:59,245 INFO L225 Difference]: With dead ends: 6275 [2020-10-26 23:45:59,246 INFO L226 Difference]: Without dead ends: 3337 [2020-10-26 23:45:59,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:45:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2020-10-26 23:45:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 3251. [2020-10-26 23:45:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3251 states. [2020-10-26 23:45:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 3828 transitions. [2020-10-26 23:45:59,353 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 3828 transitions. Word has length 303 [2020-10-26 23:45:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:45:59,354 INFO L481 AbstractCegarLoop]: Abstraction has 3251 states and 3828 transitions. [2020-10-26 23:45:59,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:45:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 3828 transitions. [2020-10-26 23:45:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-26 23:45:59,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:45:59,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:45:59,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:45:59,362 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:45:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:45:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1974585734, now seen corresponding path program 1 times [2020-10-26 23:45:59,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:45:59,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418624136] [2020-10-26 23:45:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:45:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:59,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:00,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:02,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:02,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 391 [2020-10-26 23:46:02,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:46:02,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2525 [2020-10-26 23:46:02,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:02,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:02,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:46:02,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 23:46:02,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:02,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:46:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:02,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:02,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:02,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:46:02,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:02,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 23:46:02,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:02,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:02,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:02,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:02,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:02,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:46:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:02,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:02,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:02,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:46:02,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:02,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-26 23:46:02,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:02,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:46:02,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:02,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:46:02,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:02,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:46:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:02,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:03,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:03,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:46:03,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:03,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 23:46:03,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:46:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:46:03,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:46:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:46:03,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418624136] [2020-10-26 23:46:03,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:46:03,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:46:03,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251418445] [2020-10-26 23:46:03,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:46:03,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:46:03,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:46:03,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:46:03,382 INFO L87 Difference]: Start difference. First operand 3251 states and 3828 transitions. Second operand 7 states. [2020-10-26 23:46:03,533 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:46:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:46:15,985 INFO L93 Difference]: Finished difference Result 7864 states and 9585 transitions. [2020-10-26 23:46:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:46:15,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 377 [2020-10-26 23:46:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:46:16,008 INFO L225 Difference]: With dead ends: 7864 [2020-10-26 23:46:16,008 INFO L226 Difference]: Without dead ends: 4926 [2020-10-26 23:46:16,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:46:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2020-10-26 23:46:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4835. [2020-10-26 23:46:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4835 states. [2020-10-26 23:46:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 5648 transitions. [2020-10-26 23:46:16,159 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 5648 transitions. Word has length 377 [2020-10-26 23:46:16,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:46:16,160 INFO L481 AbstractCegarLoop]: Abstraction has 4835 states and 5648 transitions. [2020-10-26 23:46:16,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:46:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 5648 transitions. [2020-10-26 23:46:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-10-26 23:46:16,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:46:16,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:46:16,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:46:16,168 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:46:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:46:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1490449800, now seen corresponding path program 1 times [2020-10-26 23:46:16,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:46:16,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508078870] [2020-10-26 23:46:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:46:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:16,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:16,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:19,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:19,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-26 23:46:19,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:46:19,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3066 [2020-10-26 23:46:19,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:19,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:19,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:46:19,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:46:19,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:19,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:46:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:19,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:19,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:19,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:46:19,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:19,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:46:19,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:19,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:46:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:19,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:19,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:19,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:46:19,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:19,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-26 23:46:19,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:46:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:19,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:46:19,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:20,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:46:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:20,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:20,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:20,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:46:20,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:20,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 23:46:20,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:20,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:20,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:46:20,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:46:20,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:46:20,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508078870] [2020-10-26 23:46:20,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:46:20,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:46:20,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9867616] [2020-10-26 23:46:20,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:46:20,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:46:20,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:46:20,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:46:20,635 INFO L87 Difference]: Start difference. First operand 4835 states and 5648 transitions. Second operand 7 states. [2020-10-26 23:46:24,856 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:46:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:46:35,054 INFO L93 Difference]: Finished difference Result 10390 states and 12254 transitions. [2020-10-26 23:46:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:46:35,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 403 [2020-10-26 23:46:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:46:35,083 INFO L225 Difference]: With dead ends: 10390 [2020-10-26 23:46:35,084 INFO L226 Difference]: Without dead ends: 5868 [2020-10-26 23:46:35,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:46:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2020-10-26 23:46:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 5798. [2020-10-26 23:46:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5798 states. [2020-10-26 23:46:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 6694 transitions. [2020-10-26 23:46:35,243 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 6694 transitions. Word has length 403 [2020-10-26 23:46:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:46:35,278 INFO L481 AbstractCegarLoop]: Abstraction has 5798 states and 6694 transitions. [2020-10-26 23:46:35,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:46:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 6694 transitions. [2020-10-26 23:46:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-10-26 23:46:35,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:46:35,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:46:35,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:46:35,292 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:46:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:46:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash -275965456, now seen corresponding path program 1 times [2020-10-26 23:46:35,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:46:35,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399860002] [2020-10-26 23:46:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:46:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:35,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:36,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:36,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 429 [2020-10-26 23:46:36,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:36,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-26 23:46:36,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:46:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 23:46:36,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:36,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:46:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:36,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:36,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:36,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:46:36,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:36,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:46:36,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:36,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:36,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:46:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:36,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:36,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:46:36,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:36,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 23:46:36,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:36,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:36,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:36,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:36,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:46:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:36,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:36,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:36,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:46:36,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:36,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 23:46:36,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:36,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:46:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:46:36,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 23:46:36,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399860002] [2020-10-26 23:46:36,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:46:36,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:46:36,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873099217] [2020-10-26 23:46:36,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:46:36,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:46:36,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:46:36,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:46:36,971 INFO L87 Difference]: Start difference. First operand 5798 states and 6694 transitions. Second operand 5 states. [2020-10-26 23:46:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:46:49,043 INFO L93 Difference]: Finished difference Result 12869 states and 15279 transitions. [2020-10-26 23:46:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:46:49,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 415 [2020-10-26 23:46:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:46:49,075 INFO L225 Difference]: With dead ends: 12869 [2020-10-26 23:46:49,075 INFO L226 Difference]: Without dead ends: 7384 [2020-10-26 23:46:49,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:46:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7384 states. [2020-10-26 23:46:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7384 to 7379. [2020-10-26 23:46:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7379 states. [2020-10-26 23:46:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7379 states to 7379 states and 8467 transitions. [2020-10-26 23:46:49,256 INFO L78 Accepts]: Start accepts. Automaton has 7379 states and 8467 transitions. Word has length 415 [2020-10-26 23:46:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:46:49,259 INFO L481 AbstractCegarLoop]: Abstraction has 7379 states and 8467 transitions. [2020-10-26 23:46:49,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:46:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7379 states and 8467 transitions. [2020-10-26 23:46:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-10-26 23:46:49,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:46:49,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:46:49,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:46:49,264 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:46:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:46:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash -324743590, now seen corresponding path program 1 times [2020-10-26 23:46:49,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:46:49,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752134897] [2020-10-26 23:46:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:46:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:49,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:51,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:51,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 465 [2020-10-26 23:46:51,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1871 [2020-10-26 23:46:51,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 23:46:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:46:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 456 [2020-10-26 23:46:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:51,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:46:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:51,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:51,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:51,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:46:51,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 23:46:51,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:46:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:46:51,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:51,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:46:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:51,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:51,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:46:51,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:51,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-26 23:46:51,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:51,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:51,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:46:51,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-26 23:46:51,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:52,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:46:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:52,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:52,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:52,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 23:46:52,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:52,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-26 23:46:52,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:52,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:46:52,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:46:52,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 23:46:52,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-26 23:46:52,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752134897] [2020-10-26 23:46:52,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:46:52,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:46:52,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40038194] [2020-10-26 23:46:52,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:46:52,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:46:52,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:46:52,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:46:52,905 INFO L87 Difference]: Start difference. First operand 7379 states and 8467 transitions. Second operand 8 states. [2020-10-26 23:47:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:47:12,619 INFO L93 Difference]: Finished difference Result 17672 states and 21483 transitions. [2020-10-26 23:47:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:47:12,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 451 [2020-10-26 23:47:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:47:12,671 INFO L225 Difference]: With dead ends: 17672 [2020-10-26 23:47:12,672 INFO L226 Difference]: Without dead ends: 11532 [2020-10-26 23:47:12,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:47:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11532 states. [2020-10-26 23:47:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11532 to 10563. [2020-10-26 23:47:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10563 states. [2020-10-26 23:47:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10563 states to 10563 states and 12611 transitions. [2020-10-26 23:47:12,990 INFO L78 Accepts]: Start accepts. Automaton has 10563 states and 12611 transitions. Word has length 451 [2020-10-26 23:47:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:47:12,991 INFO L481 AbstractCegarLoop]: Abstraction has 10563 states and 12611 transitions. [2020-10-26 23:47:12,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:47:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 10563 states and 12611 transitions. [2020-10-26 23:47:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-10-26 23:47:12,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:12,999 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:47:12,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:47:13,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash -74595292, now seen corresponding path program 1 times [2020-10-26 23:47:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:13,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438920614] [2020-10-26 23:47:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:13,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:15,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:15,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:17,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:17,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 522 [2020-10-26 23:47:17,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:47:17,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4499 [2020-10-26 23:47:17,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:47:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:47:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:47:17,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:17,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:17,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:17,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:17,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:17,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:47:17,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:47:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:47:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:17,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:47:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:18,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:18,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:18,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:47:18,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:18,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 23:47:18,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:47:18,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:18,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:47:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:18,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:18,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:18,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:47:18,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-26 23:47:18,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:47:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:47:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:18,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:47:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:18,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:18,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:18,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:18,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:47:18,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:47:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 23:47:18,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:18,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:47:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 310 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:47:19,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438920614] [2020-10-26 23:47:19,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:47:19,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 23:47:19,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625840644] [2020-10-26 23:47:19,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 23:47:19,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:47:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 23:47:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:47:19,085 INFO L87 Difference]: Start difference. First operand 10563 states and 12611 transitions. Second operand 10 states. [2020-10-26 23:47:26,745 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:47:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:47:44,089 INFO L93 Difference]: Finished difference Result 32198 states and 40281 transitions. [2020-10-26 23:47:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 23:47:44,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 506 [2020-10-26 23:47:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:47:44,166 INFO L225 Difference]: With dead ends: 32198 [2020-10-26 23:47:44,166 INFO L226 Difference]: Without dead ends: 21948 [2020-10-26 23:47:44,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-26 23:47:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21948 states. [2020-10-26 23:47:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21948 to 20027. [2020-10-26 23:47:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20027 states. [2020-10-26 23:47:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20027 states to 20027 states and 24072 transitions. [2020-10-26 23:47:44,757 INFO L78 Accepts]: Start accepts. Automaton has 20027 states and 24072 transitions. Word has length 506 [2020-10-26 23:47:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:47:44,758 INFO L481 AbstractCegarLoop]: Abstraction has 20027 states and 24072 transitions. [2020-10-26 23:47:44,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 23:47:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 20027 states and 24072 transitions. [2020-10-26 23:47:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2020-10-26 23:47:44,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:44,768 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:47:44,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:47:44,769 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:44,770 INFO L82 PathProgramCache]: Analyzing trace with hash 93853945, now seen corresponding path program 1 times [2020-10-26 23:47:44,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:44,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171796552] [2020-10-26 23:47:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:45,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:46,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:46,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:47,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:49,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:49,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:49,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 559 [2020-10-26 23:47:49,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:47:49,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4636 [2020-10-26 23:47:49,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:49,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:49,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:47:49,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:47:49,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:49,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:49,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:49,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:49,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:49,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:49,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:47:49,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:49,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:47:49,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:49,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:47:49,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:49,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:47:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:49,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:49,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:49,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:47:49,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:49,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 23:47:49,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:47:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:47:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:50,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:47:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:50,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:50,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:50,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:47:50,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:50,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 23:47:50,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:47:50,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:50,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:47:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:50,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:50,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:50,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:50,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 23:47:50,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:47:50,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-26 23:47:50,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:47:50,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:47:50,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171796552] [2020-10-26 23:47:50,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:47:50,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:47:50,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797298422] [2020-10-26 23:47:50,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:47:50,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:47:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:47:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:47:50,749 INFO L87 Difference]: Start difference. First operand 20027 states and 24072 transitions. Second operand 7 states. [2020-10-26 23:47:50,899 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 65