/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/array-examples/standard_init2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:21:41,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:21:41,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:21:41,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:21:41,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:21:41,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:21:41,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:21:41,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:21:41,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:21:41,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:21:41,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:21:41,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:21:41,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:21:41,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:21:41,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:21:41,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:21:41,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:21:41,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:21:41,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:21:41,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:21:41,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:21:41,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:21:41,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:21:41,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:21:41,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:21:41,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:21:41,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:21:41,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:21:42,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:21:42,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:21:42,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:21:42,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:21:42,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:21:42,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:21:42,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:21:42,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:21:42,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:21:42,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:21:42,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:21:42,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:21:42,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:21:42,014 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 19:21:42,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:21:42,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:21:42,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:21:42,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:21:42,080 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:21:42,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:21:42,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:21:42,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:21:42,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:21:42,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:21:42,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:21:42,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:21:42,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:21:42,083 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:21:42,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:21:42,083 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:21:42,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:21:42,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:21:42,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:21:42,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:21:42,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:21:42,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:21:42,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:21:42,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:21:42,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:21:42,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:21:42,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:21:42,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:21:42,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:21:42,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:21:42,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:21:42,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:21:42,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:21:42,571 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:21:42,572 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:21:42,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init2_ground-1.i [2020-10-26 19:21:42,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fa80886c/def8befb8bea44acae8950bcebcf9b02/FLAG63b6c2081 [2020-10-26 19:21:43,297 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:21:43,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init2_ground-1.i [2020-10-26 19:21:43,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fa80886c/def8befb8bea44acae8950bcebcf9b02/FLAG63b6c2081 [2020-10-26 19:21:43,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fa80886c/def8befb8bea44acae8950bcebcf9b02 [2020-10-26 19:21:43,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:21:43,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:21:43,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:43,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:21:43,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:21:43,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:43" (1/1) ... [2020-10-26 19:21:43,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a85f75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:43, skipping insertion in model container [2020-10-26 19:21:43,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:43" (1/1) ... [2020-10-26 19:21:43,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:21:43,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:21:43,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:43,989 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:21:44,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:44,029 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:21:44,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44 WrapperNode [2020-10-26 19:21:44,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:44,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:21:44,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:21:44,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:21:44,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (1/1) ... [2020-10-26 19:21:44,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (1/1) ... [2020-10-26 19:21:44,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (1/1) ... [2020-10-26 19:21:44,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (1/1) ... [2020-10-26 19:21:44,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (1/1) ... [2020-10-26 19:21:44,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (1/1) ... [2020-10-26 19:21:44,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (1/1) ... [2020-10-26 19:21:44,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:21:44,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:21:44,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:21:44,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:21:44,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (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 19:21:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:21:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:21:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:21:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:21:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:21:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:21:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:21:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:21:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:21:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:21:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:21:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:21:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:21:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:21:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:21:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:21:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:21:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:21:44,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:21:44,420 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:21:44,420 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:21:44,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:44 BoogieIcfgContainer [2020-10-26 19:21:44,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:21:44,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:21:44,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:21:44,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:21:44,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:21:43" (1/3) ... [2020-10-26 19:21:44,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451f03e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:44, skipping insertion in model container [2020-10-26 19:21:44,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:44" (2/3) ... [2020-10-26 19:21:44,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451f03e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:44, skipping insertion in model container [2020-10-26 19:21:44,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:44" (3/3) ... [2020-10-26 19:21:44,432 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-1.i [2020-10-26 19:21:44,446 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:21:44,451 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:21:44,465 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:21:44,494 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:21:44,494 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:21:44,494 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:21:44,495 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:21:44,495 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:21:44,495 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:21:44,495 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:21:44,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:21:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-26 19:21:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:21:44,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:44,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:44,521 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:44,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1827339738, now seen corresponding path program 1 times [2020-10-26 19:21:44,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:44,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007392893] [2020-10-26 19:21:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:44,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:44,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:44,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:21:44,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:21:44,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-26 19:21:45,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:45,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:21:45,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:45,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:21:45,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:21:45,269 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-26 19:21:45,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:45,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:45,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:45,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:45,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:21:45,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:45,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:45,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:45,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:45,308 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 19:21:45,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007392893] [2020-10-26 19:21:45,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:21:45,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:21:45,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031582062] [2020-10-26 19:21:45,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:21:45,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:45,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:21:45,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:21:45,347 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-10-26 19:21:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:45,495 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2020-10-26 19:21:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:21:45,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:21:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:45,505 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:21:45,505 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 19:21:45,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:21:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 19:21:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 19:21:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:21:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 19:21:45,550 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-26 19:21:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:45,551 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 19:21:45,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:21:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 19:21:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:21:45,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:45,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:45,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:21:45,553 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:45,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1519489023, now seen corresponding path program 1 times [2020-10-26 19:21:45,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:45,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260584340] [2020-10-26 19:21:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:45,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:46,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:21:46,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:46,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 771 [2020-10-26 19:21:46,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:21:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:21:46,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:46,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:46,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:46,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:46,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:46,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:21:46,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:46,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:46,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:46,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:46,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:46,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260584340] [2020-10-26 19:21:46,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:46,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:21:46,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712198951] [2020-10-26 19:21:46,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:21:46,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:46,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:21:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:21:46,629 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2020-10-26 19:21:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:46,974 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-26 19:21:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:21:46,975 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-26 19:21:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:46,978 INFO L225 Difference]: With dead ends: 42 [2020-10-26 19:21:46,978 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:21:46,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:21:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:21:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-26 19:21:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:21:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-26 19:21:46,994 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2020-10-26 19:21:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:46,995 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-26 19:21:46,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:21:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-26 19:21:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:21:46,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:46,996 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:46,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:21:46,997 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash -343793070, now seen corresponding path program 2 times [2020-10-26 19:21:46,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:46,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845850465] [2020-10-26 19:21:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:47,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:21:47,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:47,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-26 19:21:47,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:21:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:21:47,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:47,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:47,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:47,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:47,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:47,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:21:47,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:47,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:47,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:47,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845850465] [2020-10-26 19:21:47,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:47,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:21:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929139619] [2020-10-26 19:21:47,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:21:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:21:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:21:47,724 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2020-10-26 19:21:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:48,002 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-26 19:21:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:21:48,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-26 19:21:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:48,006 INFO L225 Difference]: With dead ends: 50 [2020-10-26 19:21:48,006 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:21:48,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:21:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:21:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2020-10-26 19:21:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:21:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-26 19:21:48,018 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2020-10-26 19:21:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:48,019 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-26 19:21:48,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:21:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-26 19:21:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:21:48,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:48,020 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:48,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:21:48,021 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:48,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1743043105, now seen corresponding path program 3 times [2020-10-26 19:21:48,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:48,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035465654] [2020-10-26 19:21:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:48,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:48,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:48,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:48,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:21:48,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:48,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-26 19:21:48,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:21:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:21:48,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:48,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:48,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:48,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:48,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:48,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:48,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:48,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:48,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:48,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035465654] [2020-10-26 19:21:48,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:48,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:21:48,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429603433] [2020-10-26 19:21:48,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:21:48,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:21:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:21:48,644 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 12 states. [2020-10-26 19:21:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:48,963 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-26 19:21:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:21:48,963 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-26 19:21:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:48,965 INFO L225 Difference]: With dead ends: 51 [2020-10-26 19:21:48,965 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:21:48,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:21:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:21:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2020-10-26 19:21:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:21:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-26 19:21:48,975 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2020-10-26 19:21:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:48,975 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-26 19:21:48,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:21:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-26 19:21:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:21:48,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:48,976 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:48,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:21:48,977 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:48,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2010455090, now seen corresponding path program 4 times [2020-10-26 19:21:48,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:48,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024145931] [2020-10-26 19:21:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:48,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:49,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:49,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:49,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:21:49,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:49,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-26 19:21:49,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:21:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:21:49,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:49,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:49,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:49,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:49,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:49,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:49,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:21:49,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:49,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:49,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 19:21:49,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024145931] [2020-10-26 19:21:49,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:49,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:21:49,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950460179] [2020-10-26 19:21:49,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:21:49,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:21:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:21:49,579 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-10-26 19:21:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:49,671 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-26 19:21:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:21:49,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:21:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:49,673 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:21:49,673 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:21:49,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:21:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:21:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-26 19:21:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:21:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-26 19:21:49,690 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2020-10-26 19:21:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:49,692 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-26 19:21:49,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:21:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-26 19:21:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:21:49,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:49,693 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:49,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:21:49,694 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:49,694 INFO L82 PathProgramCache]: Analyzing trace with hash 488907746, now seen corresponding path program 5 times [2020-10-26 19:21:49,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:49,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358111203] [2020-10-26 19:21:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:49,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:49,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:50,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:21:50,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:50,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-26 19:21:50,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:50,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:21:50,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:50,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:21:50,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:50,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:50,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:50,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:50,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:50,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:50,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:50,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:50,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:50,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:50,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 19:21:50,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358111203] [2020-10-26 19:21:50,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:50,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:21:50,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974803808] [2020-10-26 19:21:50,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:21:50,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:50,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:21:50,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:21:50,470 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-10-26 19:21:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:50,551 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-26 19:21:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:21:50,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-26 19:21:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:50,552 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:21:50,552 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:21:50,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:21:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:21:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-26 19:21:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:21:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 19:21:50,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 23 [2020-10-26 19:21:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:50,561 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 19:21:50,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:21:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 19:21:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:21:50,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:50,563 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:50,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:21:50,563 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 565580338, now seen corresponding path program 6 times [2020-10-26 19:21:50,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:50,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665789290] [2020-10-26 19:21:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:50,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:51,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:21:51,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-26 19:21:51,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:21:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:21:51,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:51,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:51,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:51,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:51,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:51,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:51,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:51,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:51,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:51,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:51,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 19:21:51,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665789290] [2020-10-26 19:21:51,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:51,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:21:51,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191872697] [2020-10-26 19:21:51,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:21:51,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:51,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:21:51,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:21:51,317 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 7 states. [2020-10-26 19:21:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:51,395 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-26 19:21:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:21:51,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-26 19:21:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:51,397 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:21:51,397 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:21:51,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:21:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:21:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-26 19:21:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:21:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-26 19:21:51,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-10-26 19:21:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:51,404 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-26 19:21:51,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:21:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-26 19:21:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:21:51,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:51,405 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:51,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:21:51,406 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1352536606, now seen corresponding path program 7 times [2020-10-26 19:21:51,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539886030] [2020-10-26 19:21:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:51,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:52,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:21:52,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-26 19:21:52,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:21:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:21:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:52,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:52,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:52,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:52,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:52,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:52,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:52,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:52,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 19:21:52,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539886030] [2020-10-26 19:21:52,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:52,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:21:52,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046484971] [2020-10-26 19:21:52,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:21:52,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:21:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:21:52,431 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-26 19:21:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:52,517 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-26 19:21:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:21:52,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-26 19:21:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:52,519 INFO L225 Difference]: With dead ends: 51 [2020-10-26 19:21:52,519 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:21:52,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:21:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:21:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-26 19:21:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:21:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-26 19:21:52,526 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2020-10-26 19:21:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:52,526 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-26 19:21:52,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:21:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-26 19:21:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:21:52,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:52,528 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:52,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:21:52,528 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash -232648639, now seen corresponding path program 8 times [2020-10-26 19:21:52,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:52,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478175025] [2020-10-26 19:21:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:53,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:53,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:21:53,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:53,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-26 19:21:53,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:53,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:21:53,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:53,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:21:53,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:53,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:53,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:53,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:53,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:53,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:21:53,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:53,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:21:53,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478175025] [2020-10-26 19:21:53,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:53,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:21:53,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887638907] [2020-10-26 19:21:53,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:21:53,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:21:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:21:53,820 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-26 19:21:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:53,921 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-26 19:21:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:21:53,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-26 19:21:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:53,923 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:21:53,923 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:21:53,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:21:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:21:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-26 19:21:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:21:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-26 19:21:53,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-10-26 19:21:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:53,933 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-26 19:21:53,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:21:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-26 19:21:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:21:53,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:53,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:53,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:21:53,937 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:53,937 INFO L82 PathProgramCache]: Analyzing trace with hash 221842882, now seen corresponding path program 9 times [2020-10-26 19:21:53,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:53,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077898071] [2020-10-26 19:21:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:53,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:54,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:54,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:55,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:55,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:21:55,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:55,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-26 19:21:55,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:55,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:21:55,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:55,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:21:55,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:56,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:56,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:56,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:56,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:56,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:56,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:56,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:56,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:56,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:56,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077898071] [2020-10-26 19:21:56,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:56,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:21:56,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609970715] [2020-10-26 19:21:56,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:21:56,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:21:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:21:56,342 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2020-10-26 19:21:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:56,725 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-26 19:21:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:21:56,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-26 19:21:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:56,726 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:21:56,727 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:21:56,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:21:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:21:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-26 19:21:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:21:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-26 19:21:56,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 29 [2020-10-26 19:21:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:56,736 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-26 19:21:56,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:21:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-26 19:21:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:21:56,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:56,737 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:56,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:21:56,738 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2097888433, now seen corresponding path program 10 times [2020-10-26 19:21:56,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:56,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923997682] [2020-10-26 19:21:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:58,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:58,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:21:58,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:58,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1798 [2020-10-26 19:21:58,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:21:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:21:58,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:59,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:59,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:59,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:59,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:21:59,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:59,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:59,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923997682] [2020-10-26 19:21:59,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:59,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:21:59,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955369665] [2020-10-26 19:21:59,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:21:59,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:59,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:21:59,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:21:59,059 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 21 states. [2020-10-26 19:21:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:59,584 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-10-26 19:21:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:21:59,585 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-26 19:21:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:59,588 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:21:59,589 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:21:59,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:21:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:21:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2020-10-26 19:21:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:21:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-26 19:21:59,608 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 30 [2020-10-26 19:21:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:59,609 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-26 19:21:59,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:21:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-26 19:21:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:21:59,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:59,617 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:59,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:21:59,617 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:59,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:59,621 INFO L82 PathProgramCache]: Analyzing trace with hash 125758370, now seen corresponding path program 11 times [2020-10-26 19:21:59,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:59,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368115562] [2020-10-26 19:21:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:59,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:59,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:01,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:22:01,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:01,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1721 [2020-10-26 19:22:01,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:01,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:22:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:22:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:01,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:01,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:01,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:01,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:01,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:01,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:01,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:01,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:01,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:01,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:22:01,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368115562] [2020-10-26 19:22:01,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:01,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:22:01,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518969072] [2020-10-26 19:22:01,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:22:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:01,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:22:01,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:22:01,473 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2020-10-26 19:22:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:01,584 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-26 19:22:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:22:01,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-26 19:22:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:01,586 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:22:01,586 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:22:01,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:22:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:22:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-26 19:22:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:22:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-26 19:22:01,594 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 31 [2020-10-26 19:22:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:01,595 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-26 19:22:01,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:22:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-26 19:22:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:22:01,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:01,596 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:01,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:22:01,596 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash -542799374, now seen corresponding path program 12 times [2020-10-26 19:22:01,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:01,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322611648] [2020-10-26 19:22:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:01,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:03,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:22:03,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-26 19:22:03,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:22:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:22:03,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:22:03,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:03,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:03,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:03,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:03,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:22:03,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:03,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:03,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322611648] [2020-10-26 19:22:03,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:03,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:22:03,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795899133] [2020-10-26 19:22:03,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:22:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:03,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:22:03,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:22:03,899 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 23 states. [2020-10-26 19:22:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:04,365 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-10-26 19:22:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:22:04,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-26 19:22:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:04,367 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:22:04,367 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:22:04,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:22:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:22:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-26 19:22:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:22:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:22:04,376 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 32 [2020-10-26 19:22:04,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:04,377 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:22:04,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:22:04,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:22:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:22:04,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:04,378 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:04,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:22:04,378 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash -131185023, now seen corresponding path program 13 times [2020-10-26 19:22:04,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:04,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137492212] [2020-10-26 19:22:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:04,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:04,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:04,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:06,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:06,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:22:06,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:06,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1969 [2020-10-26 19:22:06,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:06,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:22:06,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:06,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:22:06,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:07,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:07,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:07,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:07,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:07,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:22:07,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:07,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:07,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:07,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:07,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137492212] [2020-10-26 19:22:07,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:07,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:22:07,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594290305] [2020-10-26 19:22:07,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:22:07,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:07,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:22:07,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:22:07,086 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 24 states. [2020-10-26 19:22:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:07,631 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-26 19:22:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:22:07,632 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-26 19:22:07,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:07,633 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:22:07,633 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:22:07,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:22:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:22:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-10-26 19:22:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:22:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-26 19:22:07,655 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 33 [2020-10-26 19:22:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:07,656 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-26 19:22:07,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:22:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-26 19:22:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:22:07,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:07,659 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:07,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:22:07,659 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash -256042030, now seen corresponding path program 14 times [2020-10-26 19:22:07,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:07,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973621711] [2020-10-26 19:22:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:07,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:09,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:09,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:22:09,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:09,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2025 [2020-10-26 19:22:09,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:22:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:22:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:10,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:10,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:10,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:10,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:10,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:10,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:10,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:10,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:10,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:10,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:10,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:10,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973621711] [2020-10-26 19:22:10,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:10,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:22:10,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67925314] [2020-10-26 19:22:10,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:22:10,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:22:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:22:10,792 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 25 states. [2020-10-26 19:22:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:11,333 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-26 19:22:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:22:11,342 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-26 19:22:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:11,343 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:22:11,343 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:22:11,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:22:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:22:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-10-26 19:22:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:22:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-26 19:22:11,372 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 34 [2020-10-26 19:22:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:11,373 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-26 19:22:11,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:22:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-26 19:22:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:22:11,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:11,374 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:11,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:22:11,374 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash 168358049, now seen corresponding path program 15 times [2020-10-26 19:22:11,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:11,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238294364] [2020-10-26 19:22:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:13,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:22:13,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:13,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-26 19:22:13,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:13,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:22:13,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:13,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:22:13,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:13,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:13,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:13,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:13,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:13,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:13,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:13,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:13,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:13,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-26 19:22:13,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238294364] [2020-10-26 19:22:13,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:13,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:22:13,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650498756] [2020-10-26 19:22:13,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:22:13,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:13,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:22:13,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:22:13,417 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 11 states. [2020-10-26 19:22:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:13,540 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-26 19:22:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:22:13,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-26 19:22:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:13,542 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:22:13,543 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:22:13,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:22:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:22:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-26 19:22:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:22:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-26 19:22:13,556 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-10-26 19:22:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:13,556 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-26 19:22:13,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:22:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-26 19:22:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:22:13,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:13,558 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:13,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:22:13,558 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:13,559 INFO L82 PathProgramCache]: Analyzing trace with hash 370665201, now seen corresponding path program 16 times [2020-10-26 19:22:13,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:13,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902978459] [2020-10-26 19:22:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:13,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:14,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:15,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:15,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:22:15,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:15,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2195 [2020-10-26 19:22:15,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:15,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:22:15,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:15,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:22:15,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:17,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:17,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:17,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:17,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:17,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:17,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:17,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:17,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902978459] [2020-10-26 19:22:17,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:17,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:22:17,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918739022] [2020-10-26 19:22:17,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:22:17,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:17,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:22:17,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:22:17,087 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 27 states. [2020-10-26 19:22:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:17,736 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-26 19:22:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:22:17,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-10-26 19:22:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:17,737 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:22:17,738 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:22:17,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:22:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:22:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-26 19:22:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:22:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-26 19:22:17,747 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 36 [2020-10-26 19:22:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:17,747 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-26 19:22:17,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:22:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-26 19:22:17,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:22:17,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:17,748 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:17,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:22:17,749 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:17,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1878554270, now seen corresponding path program 17 times [2020-10-26 19:22:17,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:17,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52425483] [2020-10-26 19:22:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:17,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:18,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:19,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:22:19,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:19,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2230 [2020-10-26 19:22:19,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:19,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:22:19,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:19,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:22:19,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:20,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:20,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:20,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:20,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:20,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:20,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:22:20,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:20,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:20,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:22:20,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52425483] [2020-10-26 19:22:20,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:20,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:22:20,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778753708] [2020-10-26 19:22:20,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:22:20,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:22:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:22:20,135 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 12 states. [2020-10-26 19:22:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:20,244 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-26 19:22:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:22:20,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-26 19:22:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:20,245 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:22:20,246 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:22:20,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:22:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:22:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-26 19:22:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:22:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-26 19:22:20,263 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2020-10-26 19:22:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:20,265 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-26 19:22:20,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:22:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-26 19:22:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:22:20,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:20,265 INFO L422 BasicCegarLoop]: trace histogram [12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:20,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:22:20,266 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:20,266 INFO L82 PathProgramCache]: Analyzing trace with hash -734909518, now seen corresponding path program 18 times [2020-10-26 19:22:20,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:20,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536960255] [2020-10-26 19:22:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:20,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:20,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:21,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:22,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:22,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:22:22,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:22,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2240 [2020-10-26 19:22:22,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:22,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:22:22,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:22,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:22:22,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:22,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:22,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:22,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:22,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:22,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:22,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:22,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:22,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:22,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:22,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:22,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:22:22,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536960255] [2020-10-26 19:22:22,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:22,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:22:22,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59130560] [2020-10-26 19:22:22,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:22:22,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:22,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:22:22,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:22,677 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 13 states. [2020-10-26 19:22:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:22,816 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-10-26 19:22:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:22:22,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-26 19:22:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:22,817 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:22:22,817 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:22:22,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:22:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-26 19:22:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:22:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:22:22,826 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 38 [2020-10-26 19:22:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:22,827 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:22:22,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:22:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:22:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:22:22,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:22,828 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:22,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:22:22,828 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:22,828 INFO L82 PathProgramCache]: Analyzing trace with hash 358339426, now seen corresponding path program 19 times [2020-10-26 19:22:22,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:22,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443082430] [2020-10-26 19:22:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:25,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:22:25,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:25,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2480 [2020-10-26 19:22:25,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:22:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:22:25,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:26,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:26,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:26,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:26,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:26,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:26,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:26,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:26,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 29 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:26,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443082430] [2020-10-26 19:22:26,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:26,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:22:26,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519487893] [2020-10-26 19:22:26,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:22:26,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:26,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:22:26,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:22:26,324 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 30 states. [2020-10-26 19:22:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:26,949 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-10-26 19:22:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:22:26,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 39 [2020-10-26 19:22:26,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:26,952 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:22:26,952 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:22:26,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=875, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:22:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:22:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-10-26 19:22:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:22:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-26 19:22:26,962 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 39 [2020-10-26 19:22:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:26,962 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-26 19:22:26,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:22:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-26 19:22:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:22:26,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:26,963 INFO L422 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:26,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:22:26,963 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2034314001, now seen corresponding path program 20 times [2020-10-26 19:22:26,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:26,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964238859] [2020-10-26 19:22:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:26,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:27,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:29,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:22:29,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:29,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2245 [2020-10-26 19:22:29,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:22:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:29,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:22:29,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:29,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:29,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:29,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:29,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:29,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:29,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:29,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:29,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:29,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:29,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-26 19:22:29,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964238859] [2020-10-26 19:22:29,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:29,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:22:29,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900761666] [2020-10-26 19:22:29,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:22:29,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:29,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:22:29,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:22:29,387 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 14 states. [2020-10-26 19:22:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:29,509 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-26 19:22:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:22:29,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-26 19:22:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:29,511 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:22:29,511 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:22:29,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:22:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:22:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-26 19:22:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:22:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-26 19:22:29,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2020-10-26 19:22:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:29,521 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-26 19:22:29,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:22:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-26 19:22:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:22:29,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:29,523 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:29,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:22:29,524 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:29,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:29,524 INFO L82 PathProgramCache]: Analyzing trace with hash 379561665, now seen corresponding path program 21 times [2020-10-26 19:22:29,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:29,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795443603] [2020-10-26 19:22:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:29,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:30,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:31,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:22:31,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:31,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2237 [2020-10-26 19:22:31,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:31,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:22:31,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:31,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:22:31,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:31,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:31,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:31,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:31,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:31,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:31,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:31,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:31,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-26 19:22:31,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795443603] [2020-10-26 19:22:31,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:31,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:22:31,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533051511] [2020-10-26 19:22:31,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:22:31,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:31,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:22:31,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:22:31,973 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 15 states. [2020-10-26 19:22:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:32,142 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-26 19:22:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:22:32,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-26 19:22:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:32,144 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:22:32,144 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:22:32,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:22:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:22:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-26 19:22:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:22:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-26 19:22:32,167 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 41 [2020-10-26 19:22:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:32,167 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-26 19:22:32,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:22:32,167 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-26 19:22:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:22:32,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:32,168 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:32,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:22:32,169 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash 621846801, now seen corresponding path program 22 times [2020-10-26 19:22:32,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:32,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231675098] [2020-10-26 19:22:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:32,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:32,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:32,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:35,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:35,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:22:35,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:35,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3319 [2020-10-26 19:22:35,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:35,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:22:35,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:35,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:22:35,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:37,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:37,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:37,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:37,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:37,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:37,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:22:37,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:37,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:37,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:37,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:37,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 46 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:37,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231675098] [2020-10-26 19:22:37,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:37,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:22:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277322654] [2020-10-26 19:22:37,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:22:37,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:37,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:22:37,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=679, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:22:37,587 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 33 states. [2020-10-26 19:22:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:38,314 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-10-26 19:22:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:22:38,315 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-26 19:22:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:38,316 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:22:38,316 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:22:38,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=468, Invalid=1014, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:22:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:22:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-26 19:22:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:22:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:22:38,326 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 42 [2020-10-26 19:22:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:38,326 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:22:38,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:22:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:22:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:22:38,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:38,327 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:38,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:22:38,327 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:38,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1613108034, now seen corresponding path program 23 times [2020-10-26 19:22:38,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:38,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251973817] [2020-10-26 19:22:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:38,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:38,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:41,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:22:41,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:41,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2996 [2020-10-26 19:22:41,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:41,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:22:41,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:41,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:22:41,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:41,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:41,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:41,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:41,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:41,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:41,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:41,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:41,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:41,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:41,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:22:41,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251973817] [2020-10-26 19:22:41,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:41,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:22:41,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144290810] [2020-10-26 19:22:41,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:22:41,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:22:41,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:22:41,536 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 16 states. [2020-10-26 19:22:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:41,704 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-26 19:22:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:22:41,705 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-26 19:22:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:41,706 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:22:41,706 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:22:41,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:22:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:22:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-26 19:22:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:22:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-26 19:22:41,715 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 43 [2020-10-26 19:22:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:41,715 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-26 19:22:41,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:22:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-26 19:22:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:22:41,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:41,716 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:41,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:22:41,718 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:41,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1774077550, now seen corresponding path program 24 times [2020-10-26 19:22:41,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:41,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096368389] [2020-10-26 19:22:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:41,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:42,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:45,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:22:45,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3376 [2020-10-26 19:22:45,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:22:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:22:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:47,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:47,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:47,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:47,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:47,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:47,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:47,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 56 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:47,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096368389] [2020-10-26 19:22:47,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:47,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:22:47,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020251769] [2020-10-26 19:22:47,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:22:47,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:47,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:22:47,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=757, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:22:47,258 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 35 states. [2020-10-26 19:22:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:47,979 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-10-26 19:22:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:22:47,980 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-10-26 19:22:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:47,980 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:22:47,981 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:22:47,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=529, Invalid=1111, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:22:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:22:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2020-10-26 19:22:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:22:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-26 19:22:47,990 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 44 [2020-10-26 19:22:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:47,991 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-26 19:22:47,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:22:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-26 19:22:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:22:47,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:47,991 INFO L422 BasicCegarLoop]: trace histogram [15, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:47,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:22:47,992 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 353897185, now seen corresponding path program 25 times [2020-10-26 19:22:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:47,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329885175] [2020-10-26 19:22:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:48,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:49,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:51,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:51,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:22:51,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:51,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3305 [2020-10-26 19:22:51,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:22:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:22:51,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:51,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:51,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:51,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:51,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:51,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:51,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:51,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:51,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:51,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:51,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:51,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-26 19:22:51,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329885175] [2020-10-26 19:22:51,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:51,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:22:51,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096723975] [2020-10-26 19:22:51,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:22:51,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:51,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:22:51,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:22:51,533 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 17 states. [2020-10-26 19:22:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:51,729 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-10-26 19:22:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:22:51,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-26 19:22:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:51,731 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:22:51,731 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:22:51,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:22:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:22:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-26 19:22:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:22:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-26 19:22:51,744 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 45 [2020-10-26 19:22:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:51,745 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-26 19:22:51,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:22:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-26 19:22:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:22:51,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:51,745 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:51,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:22:51,746 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:51,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:51,750 INFO L82 PathProgramCache]: Analyzing trace with hash 853761329, now seen corresponding path program 26 times [2020-10-26 19:22:51,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:51,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795949243] [2020-10-26 19:22:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:51,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:51,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:55,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:55,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:22:55,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3460 [2020-10-26 19:22:55,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:22:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:22:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:56,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:56,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:56,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:56,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:56,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:56,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:56,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:56,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 67 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:56,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795949243] [2020-10-26 19:22:56,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:56,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:22:56,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115431682] [2020-10-26 19:22:56,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:22:56,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:56,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:22:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=839, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:22:56,701 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 37 states. [2020-10-26 19:22:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:57,427 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-26 19:22:57,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:22:57,428 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-26 19:22:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:57,429 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:22:57,429 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:22:57,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=594, Invalid=1212, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:22:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:22:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-10-26 19:22:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:22:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-26 19:22:57,443 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 46 [2020-10-26 19:22:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:57,443 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-26 19:22:57,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:22:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-26 19:22:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:22:57,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:57,444 INFO L422 BasicCegarLoop]: trace histogram [16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:57,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:22:57,444 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:57,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:57,444 INFO L82 PathProgramCache]: Analyzing trace with hash 212523810, now seen corresponding path program 27 times [2020-10-26 19:22:57,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:57,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958028127] [2020-10-26 19:22:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:57,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:57,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3878 [2020-10-26 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:23:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:01,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:23:01,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:01,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:01,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:01,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:01,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:01,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:23:01,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:01,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:01,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:01,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:01,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-26 19:23:01,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958028127] [2020-10-26 19:23:01,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:01,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:23:01,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895769136] [2020-10-26 19:23:01,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:23:01,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:23:01,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:23:01,569 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 18 states. [2020-10-26 19:23:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:01,714 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-26 19:23:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:23:01,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-26 19:23:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:01,716 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:23:01,716 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:23:01,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:23:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:23:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-26 19:23:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:23:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-26 19:23:01,728 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 47 [2020-10-26 19:23:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:01,728 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-26 19:23:01,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:23:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-26 19:23:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:23:01,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:01,733 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:01,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:23:01,733 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:01,734 INFO L82 PathProgramCache]: Analyzing trace with hash -454370958, now seen corresponding path program 28 times [2020-10-26 19:23:01,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:01,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107538468] [2020-10-26 19:23:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:01,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:03,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:06,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:06,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:23:06,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:06,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4257 [2020-10-26 19:23:06,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:23:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:23:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:08,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:08,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:08,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:08,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:08,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:08,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:08,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:08,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 79 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:08,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107538468] [2020-10-26 19:23:08,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:08,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:23:08,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820498175] [2020-10-26 19:23:08,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:23:08,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:08,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:23:08,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=925, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:23:08,654 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 39 states. [2020-10-26 19:23:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:09,460 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-26 19:23:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:23:09,462 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 48 [2020-10-26 19:23:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:09,464 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:23:09,464 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:23:09,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=663, Invalid=1317, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:23:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:23:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-10-26 19:23:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:23:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-26 19:23:09,474 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 48 [2020-10-26 19:23:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:09,474 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-26 19:23:09,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:23:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-26 19:23:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:23:09,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:09,475 INFO L422 BasicCegarLoop]: trace histogram [17, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:09,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:23:09,475 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1684871423, now seen corresponding path program 29 times [2020-10-26 19:23:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:09,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617915047] [2020-10-26 19:23:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:09,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:10,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:14,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:14,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:23:14,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:14,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4616 [2020-10-26 19:23:14,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:23:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:14,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:23:14,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:14,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:14,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:14,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:14,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:14,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:14,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:14,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:14,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-26 19:23:14,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617915047] [2020-10-26 19:23:14,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:14,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:23:14,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565771178] [2020-10-26 19:23:14,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:23:14,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:23:14,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:23:14,382 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 19 states. [2020-10-26 19:23:14,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:14,579 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2020-10-26 19:23:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:23:14,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-26 19:23:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:14,581 INFO L225 Difference]: With dead ends: 101 [2020-10-26 19:23:14,581 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:23:14,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:23:14,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:23:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-26 19:23:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:23:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-26 19:23:14,591 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 49 [2020-10-26 19:23:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:14,591 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-26 19:23:14,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:23:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-26 19:23:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:23:14,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:14,592 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:14,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:23:14,592 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:14,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1674350929, now seen corresponding path program 30 times [2020-10-26 19:23:14,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:14,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164814115] [2020-10-26 19:23:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:14,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:14,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:18,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:19,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:19,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:23:19,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:19,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4842 [2020-10-26 19:23:19,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:19,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:23:19,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:19,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:23:19,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:21,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:21,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:21,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:21,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:21,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:21,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:21,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:21,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:21,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:21,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 92 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:21,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164814115] [2020-10-26 19:23:21,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:21,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:23:21,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859528505] [2020-10-26 19:23:21,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:23:21,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:23:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=996, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:23:21,297 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 41 states. [2020-10-26 19:23:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:22,024 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-10-26 19:23:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:23:22,025 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-26 19:23:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:22,027 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:23:22,027 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:23:22,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=755, Invalid=1407, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:23:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:23:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2020-10-26 19:23:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:23:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-26 19:23:22,039 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 50 [2020-10-26 19:23:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:22,040 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-26 19:23:22,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:23:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-26 19:23:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:23:22,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:22,041 INFO L422 BasicCegarLoop]: trace histogram [18, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:22,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:23:22,042 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:22,043 INFO L82 PathProgramCache]: Analyzing trace with hash -119002366, now seen corresponding path program 31 times [2020-10-26 19:23:22,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:22,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923299855] [2020-10-26 19:23:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:22,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:26,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:27,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:27,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:23:27,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:27,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:23:27,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:23:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:23:27,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:29,508 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 20 [2020-10-26 19:23:29,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:29,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:29,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:29,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:29,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:29,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:29,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:29,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 92 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:29,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923299855] [2020-10-26 19:23:29,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:29,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:23:29,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692592779] [2020-10-26 19:23:29,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:23:29,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:29,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:23:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=1061, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:23:29,930 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 42 states. [2020-10-26 19:23:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:30,619 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-10-26 19:23:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:23:30,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-10-26 19:23:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:30,621 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:23:30,621 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:23:30,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=775, Invalid=1481, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:23:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:23:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2020-10-26 19:23:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:23:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-26 19:23:30,632 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 51 [2020-10-26 19:23:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:30,632 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-26 19:23:30,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:23:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-26 19:23:30,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:23:30,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:30,633 INFO L422 BasicCegarLoop]: trace histogram [19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:30,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:23:30,633 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash 121620337, now seen corresponding path program 32 times [2020-10-26 19:23:30,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:30,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181143691] [2020-10-26 19:23:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:30,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:34,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:35,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:35,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:23:35,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:35,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:23:35,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:23:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:23:35,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:37,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:37,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:37,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:37,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:37,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:37,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:37,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:37,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:37,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:37,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:37,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 92 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:37,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181143691] [2020-10-26 19:23:37,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:37,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:23:37,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762551207] [2020-10-26 19:23:37,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:23:37,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:37,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:23:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=1108, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:23:37,879 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 43 states. [2020-10-26 19:23:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:38,723 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-10-26 19:23:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:23:38,724 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 52 [2020-10-26 19:23:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:38,724 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:23:38,725 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:23:38,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=815, Invalid=1537, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:23:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:23:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-26 19:23:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:23:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-26 19:23:38,735 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 52 [2020-10-26 19:23:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:38,735 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-26 19:23:38,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:23:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-26 19:23:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:23:38,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:38,736 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:38,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:23:38,737 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1009010462, now seen corresponding path program 33 times [2020-10-26 19:23:38,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:38,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112574451] [2020-10-26 19:23:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:38,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:38,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:42,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:43,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:43,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:23:43,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:43,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:23:43,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:43,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:23:43,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:43,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:23:43,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:44,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:44,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:44,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:44,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:44,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:44,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:44,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:44,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:44,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:44,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:44,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:23:44,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112574451] [2020-10-26 19:23:44,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:44,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:23:44,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983654424] [2020-10-26 19:23:44,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:23:44,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:44,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:23:44,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:23:44,071 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 20 states. [2020-10-26 19:23:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:44,301 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-26 19:23:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:23:44,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-26 19:23:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:44,303 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:23:44,303 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:23:44,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:23:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:23:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:23:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:23:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-26 19:23:44,312 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 53 [2020-10-26 19:23:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:44,312 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-26 19:23:44,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:23:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-26 19:23:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:23:44,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:44,313 INFO L422 BasicCegarLoop]: trace histogram [20, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:44,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:23:44,314 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:44,314 INFO L82 PathProgramCache]: Analyzing trace with hash 664255282, now seen corresponding path program 34 times [2020-10-26 19:23:44,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:44,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372358359] [2020-10-26 19:23:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:44,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:44,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:49,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:49,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:23:49,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:23:49,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:23:49,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:49,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:23:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:23:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:49,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:49,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:49,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:49,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:49,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:49,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:49,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:49,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:23:49,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372358359] [2020-10-26 19:23:49,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:49,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:23:49,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500697658] [2020-10-26 19:23:49,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:23:49,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:23:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:23:49,674 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 21 states. [2020-10-26 19:23:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:49,844 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-10-26 19:23:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:23:49,846 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-10-26 19:23:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:49,847 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:23:49,847 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:23:49,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:23:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:23:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-26 19:23:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:23:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-26 19:23:49,856 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 54 [2020-10-26 19:23:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:49,856 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-26 19:23:49,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:23:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-26 19:23:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:23:49,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:49,856 INFO L422 BasicCegarLoop]: trace histogram [20, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:49,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:23:49,857 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:49,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:49,857 INFO L82 PathProgramCache]: Analyzing trace with hash 995885794, now seen corresponding path program 35 times [2020-10-26 19:23:49,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:49,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108383330] [2020-10-26 19:23:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:49,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:49,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:54,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:54,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:23:54,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:23:54,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:23:54,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:54,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:23:54,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:54,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:23:54,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:55,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:55,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:55,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:55,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:55,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:55,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:55,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:55,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:55,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:23:55,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108383330] [2020-10-26 19:23:55,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:55,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:23:55,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740781407] [2020-10-26 19:23:55,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:23:55,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:55,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:23:55,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:23:55,239 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 22 states. [2020-10-26 19:23:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:55,473 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-26 19:23:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:23:55,474 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-26 19:23:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:55,476 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:23:55,476 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:23:55,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:23:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:23:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-26 19:23:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:23:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-26 19:23:55,486 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 55 [2020-10-26 19:23:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:55,487 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-26 19:23:55,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:23:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-26 19:23:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:23:55,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:55,488 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:55,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:23:55,488 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1608470222, now seen corresponding path program 36 times [2020-10-26 19:23:55,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:55,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886887592] [2020-10-26 19:23:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:55,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:55,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:00,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:00,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:24:00,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:00,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:24:00,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:00,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:24:00,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:00,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:24:00,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:00,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:00,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:00,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:00,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:00,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:24:00,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:00,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:00,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:00,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:00,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:24:00,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886887592] [2020-10-26 19:24:00,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:00,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:24:00,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761140355] [2020-10-26 19:24:00,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:24:00,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:00,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:24:00,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:24:00,889 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 23 states. [2020-10-26 19:24:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:01,065 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-26 19:24:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:24:01,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-26 19:24:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:01,067 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:24:01,067 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:24:01,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:24:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:24:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-26 19:24:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:24:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-26 19:24:01,079 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2020-10-26 19:24:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:01,079 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-26 19:24:01,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:24:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-26 19:24:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:24:01,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:01,080 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:01,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:24:01,081 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash -739128094, now seen corresponding path program 37 times [2020-10-26 19:24:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:01,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889104172] [2020-10-26 19:24:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:01,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:06,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:06,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:24:06,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:06,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:24:06,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:06,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:24:06,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:06,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:24:06,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:06,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:06,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:06,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:06,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:06,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:06,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:24:06,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:06,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:06,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:24:06,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889104172] [2020-10-26 19:24:06,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:06,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:24:06,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359124155] [2020-10-26 19:24:06,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:24:06,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:24:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:24:06,586 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 24 states. [2020-10-26 19:24:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:06,812 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-10-26 19:24:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:24:06,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-26 19:24:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:06,814 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:24:06,815 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:24:06,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:24:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:24:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-26 19:24:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:24:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-26 19:24:06,832 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-26 19:24:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:06,832 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-26 19:24:06,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:24:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-26 19:24:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:24:06,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:06,833 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:06,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:24:06,833 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash 291721537, now seen corresponding path program 38 times [2020-10-26 19:24:06,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:06,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005695188] [2020-10-26 19:24:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:06,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:11,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:11,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:24:11,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:11,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:24:11,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:11,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:24:11,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:11,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:24:11,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:12,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:12,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:12,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:12,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:12,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:12,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:12,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:12,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:12,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:12,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:12,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-26 19:24:12,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005695188] [2020-10-26 19:24:12,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:12,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:24:12,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409359924] [2020-10-26 19:24:12,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:24:12,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:12,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:24:12,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:24:12,338 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 25 states. [2020-10-26 19:24:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:12,559 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-10-26 19:24:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:24:12,560 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-26 19:24:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:12,561 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:24:12,561 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:24:12,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:24:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:24:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:24:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:24:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-26 19:24:12,570 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-26 19:24:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:12,570 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-26 19:24:12,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:24:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-26 19:24:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:24:12,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:12,571 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:12,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:24:12,571 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1738878146, now seen corresponding path program 39 times [2020-10-26 19:24:12,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:12,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524445425] [2020-10-26 19:24:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:12,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:12,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:17,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:17,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:24:17,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:24:17,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:17,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:24:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:24:17,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:18,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:18,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:18,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:18,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:18,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:18,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:18,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-26 19:24:18,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524445425] [2020-10-26 19:24:18,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:18,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:24:18,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19206408] [2020-10-26 19:24:18,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:24:18,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:18,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:24:18,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:24:18,103 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 26 states. [2020-10-26 19:24:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:18,391 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-10-26 19:24:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:24:18,392 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-26 19:24:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:18,393 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:24:18,393 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:24:18,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:24:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:24:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-26 19:24:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:24:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-26 19:24:18,404 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-26 19:24:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:18,404 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-26 19:24:18,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:24:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-26 19:24:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:24:18,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:18,405 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:18,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:24:18,405 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966689, now seen corresponding path program 40 times [2020-10-26 19:24:18,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:18,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366123073] [2020-10-26 19:24:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:18,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:23,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:24:23,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:23,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:24:23,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:23,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:24:23,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:23,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:24:23,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:23,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:23,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:23,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:23,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:23,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:23,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:23,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:23,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:23,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-26 19:24:23,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366123073] [2020-10-26 19:24:23,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:23,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:24:23,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327334633] [2020-10-26 19:24:23,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:24:23,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:24:23,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:24:23,979 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 27 states. [2020-10-26 19:24:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:24,288 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2020-10-26 19:24:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:24:24,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-26 19:24:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:24,290 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:24:24,290 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:24:24,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:24:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:24:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-26 19:24:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:24:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-26 19:24:24,302 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-26 19:24:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:24,302 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-26 19:24:24,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:24:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-26 19:24:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:24:24,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:24,303 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:24,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:24:24,303 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:24,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1433725790, now seen corresponding path program 41 times [2020-10-26 19:24:24,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:24,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143795690] [2020-10-26 19:24:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:24,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:29,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:29,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:24:29,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:29,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:24:29,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:29,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:24:29,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:29,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:24:29,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:29,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:29,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:29,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:29,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:29,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:29,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:29,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:29,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:29,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:29,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:29,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-26 19:24:29,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143795690] [2020-10-26 19:24:29,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:29,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:24:29,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428793847] [2020-10-26 19:24:29,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:24:29,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:29,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:24:29,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:24:29,918 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2020-10-26 19:24:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:30,243 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2020-10-26 19:24:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:24:30,244 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-26 19:24:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:30,245 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:24:30,245 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:24:30,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:24:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:24:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-26 19:24:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:24:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-26 19:24:30,256 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-10-26 19:24:30,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:30,256 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-26 19:24:30,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:24:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-26 19:24:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:24:30,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:30,258 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:30,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:24:30,258 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:30,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1755337089, now seen corresponding path program 42 times [2020-10-26 19:24:30,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:30,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272915176] [2020-10-26 19:24:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:30,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:30,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:35,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:35,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:24:35,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:35,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:24:35,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:35,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:24:35,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:35,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:24:35,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:35,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:35,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:35,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:35,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:35,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:35,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:24:35,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:35,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:35,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:35,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:35,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-26 19:24:35,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272915176] [2020-10-26 19:24:35,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:35,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:24:35,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991806607] [2020-10-26 19:24:35,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:24:35,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:24:35,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:24:35,897 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-10-26 19:24:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:36,100 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-10-26 19:24:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:24:36,101 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-26 19:24:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:36,102 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:24:36,102 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:24:36,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:24:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:24:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-26 19:24:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:24:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-26 19:24:36,113 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-26 19:24:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:36,113 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-26 19:24:36,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:24:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-26 19:24:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:24:36,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:36,115 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:36,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:24:36,115 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1554089090, now seen corresponding path program 43 times [2020-10-26 19:24:36,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:36,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389580410] [2020-10-26 19:24:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:36,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:36,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:41,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:41,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:24:41,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:41,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:24:41,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:41,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:24:41,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:41,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:24:41,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:41,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:41,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:41,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:41,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:41,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:41,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:41,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:41,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:41,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:41,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-26 19:24:41,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389580410] [2020-10-26 19:24:41,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:41,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:24:41,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156932185] [2020-10-26 19:24:41,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:24:41,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:24:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:24:41,816 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 30 states. [2020-10-26 19:24:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:42,007 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-10-26 19:24:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:24:42,008 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-26 19:24:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:42,009 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:24:42,009 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:24:42,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:24:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:24:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-26 19:24:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:24:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-26 19:24:42,020 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-10-26 19:24:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:42,020 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-26 19:24:42,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:24:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-26 19:24:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:24:42,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:42,021 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:42,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:24:42,022 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1211071071, now seen corresponding path program 44 times [2020-10-26 19:24:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:42,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804200622] [2020-10-26 19:24:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:42,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:42,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:47,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:47,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:24:47,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:24:47,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:24:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:24:47,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:47,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:47,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:47,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:47,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:47,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:47,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:47,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-26 19:24:47,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804200622] [2020-10-26 19:24:47,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:47,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:24:47,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546769907] [2020-10-26 19:24:47,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:24:47,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:24:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:24:47,771 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-26 19:24:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:47,995 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2020-10-26 19:24:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:24:47,996 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-26 19:24:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:47,997 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:24:47,997 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:24:47,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:24:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:24:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-26 19:24:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:24:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-26 19:24:48,009 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2020-10-26 19:24:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:48,009 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-26 19:24:48,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:24:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-26 19:24:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:24:48,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:48,010 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:48,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:24:48,011 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash -161055646, now seen corresponding path program 45 times [2020-10-26 19:24:48,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:48,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75167586] [2020-10-26 19:24:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:48,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:48,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:53,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:53,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:24:53,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:24:53,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:24:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:24:53,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:53,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:53,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:53,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:53,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:53,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:53,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:24:53,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:53,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-26 19:24:53,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75167586] [2020-10-26 19:24:53,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:53,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:24:53,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419792119] [2020-10-26 19:24:53,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:24:53,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:24:53,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:24:53,811 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 32 states. [2020-10-26 19:24:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:54,139 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-10-26 19:24:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:24:54,140 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-26 19:24:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:54,141 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:24:54,141 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:24:54,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:24:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:24:54,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-26 19:24:54,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:24:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-26 19:24:54,153 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-26 19:24:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:54,153 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-26 19:24:54,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:24:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-26 19:24:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:24:54,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:54,154 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:54,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:24:54,154 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1485779393, now seen corresponding path program 46 times [2020-10-26 19:24:54,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:54,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724492603] [2020-10-26 19:24:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:54,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:54,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:59,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:59,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:24:59,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:24:59,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:24:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:24:59,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:59,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:59,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:59,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:59,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:59,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:59,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:59,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:59,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:59,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-10-26 19:24:59,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724492603] [2020-10-26 19:24:59,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:59,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:24:59,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430454171] [2020-10-26 19:24:59,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:24:59,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:59,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:24:59,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:59,991 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 33 states. [2020-10-26 19:25:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:00,356 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2020-10-26 19:25:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:25:00,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-26 19:25:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:00,358 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:25:00,358 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:25:00,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:25:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:25:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:25:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:25:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-26 19:25:00,369 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-26 19:25:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:00,369 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-26 19:25:00,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:25:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-26 19:25:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:25:00,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:00,370 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:00,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:25:00,370 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:00,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1999111102, now seen corresponding path program 47 times [2020-10-26 19:25:00,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:00,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328182533] [2020-10-26 19:25:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:00,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:00,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:05,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:05,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:25:05,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:05,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:25:05,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:05,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:25:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:25:05,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:06,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:06,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:06,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:06,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:06,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:25:06,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:06,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:06,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:06,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:06,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-26 19:25:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328182533] [2020-10-26 19:25:06,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:06,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:25:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436339395] [2020-10-26 19:25:06,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:25:06,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:06,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:25:06,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:25:06,296 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 34 states. [2020-10-26 19:25:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:06,646 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-10-26 19:25:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:25:06,647 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-26 19:25:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:06,648 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:25:06,648 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:25:06,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:25:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:25:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-26 19:25:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:25:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-26 19:25:06,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-26 19:25:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:06,660 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-26 19:25:06,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:25:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-26 19:25:06,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:25:06,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:06,660 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:06,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:25:06,661 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1013033503, now seen corresponding path program 48 times [2020-10-26 19:25:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:06,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742258492] [2020-10-26 19:25:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:06,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:06,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:11,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:11,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:25:11,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:11,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:25:11,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:11,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:25:11,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:11,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:25:11,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:12,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:12,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:12,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:12,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:12,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:12,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:25:12,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:12,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:12,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:12,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:12,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-26 19:25:12,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742258492] [2020-10-26 19:25:12,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:12,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:25:12,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552962639] [2020-10-26 19:25:12,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:25:12,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:25:12,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:25:12,640 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 35 states. [2020-10-26 19:25:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:12,916 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2020-10-26 19:25:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:25:12,917 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-26 19:25:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:12,918 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:25:12,918 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:25:12,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:25:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:25:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-26 19:25:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:25:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-26 19:25:12,931 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2020-10-26 19:25:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:12,931 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-26 19:25:12,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:25:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-26 19:25:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:25:12,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:12,932 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:12,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:25:12,932 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1653341150, now seen corresponding path program 49 times [2020-10-26 19:25:12,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:12,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134071282] [2020-10-26 19:25:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:12,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:17,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:17,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:25:17,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:17,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:25:17,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:17,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:25:17,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:17,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:25:17,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:18,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:18,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:18,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:18,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:18,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:18,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:18,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-26 19:25:18,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134071282] [2020-10-26 19:25:18,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:18,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:25:18,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834500694] [2020-10-26 19:25:18,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:25:18,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:18,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:25:18,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:25:18,974 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 36 states. [2020-10-26 19:25:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:19,233 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2020-10-26 19:25:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:25:19,234 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-26 19:25:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:19,235 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:25:19,235 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:25:19,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:25:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:25:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-26 19:25:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:25:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-26 19:25:19,246 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-10-26 19:25:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:19,247 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-26 19:25:19,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:25:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-26 19:25:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:25:19,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:19,247 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:19,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:25:19,248 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:19,248 INFO L82 PathProgramCache]: Analyzing trace with hash 155185665, now seen corresponding path program 50 times [2020-10-26 19:25:19,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:19,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058334702] [2020-10-26 19:25:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:19,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:24,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:24,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:25:24,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:24,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:25:24,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:25:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:25:24,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:25,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:25,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:25,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:25,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:25,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:25,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:25,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:25,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-10-26 19:25:25,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058334702] [2020-10-26 19:25:25,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:25,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:25:25,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127039272] [2020-10-26 19:25:25,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:25:25,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:25:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:25:25,336 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 37 states. [2020-10-26 19:25:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:25,666 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2020-10-26 19:25:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:25:25,667 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-26 19:25:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:25,669 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:25:25,669 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:25:25,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:25:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:25:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-26 19:25:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:25:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-26 19:25:25,681 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-10-26 19:25:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:25,681 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-26 19:25:25,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:25:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-26 19:25:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:25:25,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:25,682 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:25,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:25:25,682 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash 372806658, now seen corresponding path program 51 times [2020-10-26 19:25:25,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:25,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482615226] [2020-10-26 19:25:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:25,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:25,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:30,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:25:30,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:30,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:25:30,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:30,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:25:30,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:30,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:25:30,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0