/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:48:15,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:48:15,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:48:15,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:48:15,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:48:15,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:48:15,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:48:15,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:48:15,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:48:15,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:48:15,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:48:15,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:48:15,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:48:15,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:48:15,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:48:15,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:48:15,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:48:15,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:48:15,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:48:15,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:48:15,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:48:15,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:48:15,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:48:15,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:48:15,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:48:15,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:48:15,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:48:15,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:48:15,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:48:15,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:48:15,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:48:15,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:48:15,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:48:15,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:48:15,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:48:15,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:48:15,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:48:15,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:48:15,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:48:15,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:48:15,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:48:15,887 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 20:48:15,946 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:48:15,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:48:15,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:48:15,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:48:15,954 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:48:15,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:48:15,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:48:15,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:48:15,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:48:15,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:48:15,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:48:15,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:48:15,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:48:15,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:48:15,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:48:15,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:48:15,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:48:15,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:48:15,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:48:15,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:48:15,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:48:15,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:48:15,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:48:15,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:48:15,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:48:15,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:48:15,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:48:15,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:48:15,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:48:15,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:48:16,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:48:16,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:48:16,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:48:16,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:48:16,412 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:48:16,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label33.c [2020-10-26 20:48:16,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563c70ef2/b86d2c46cbc04959a421eb5eac30b9bb/FLAGd0deb0efd [2020-10-26 20:48:17,288 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:48:17,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label33.c [2020-10-26 20:48:17,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563c70ef2/b86d2c46cbc04959a421eb5eac30b9bb/FLAGd0deb0efd [2020-10-26 20:48:17,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563c70ef2/b86d2c46cbc04959a421eb5eac30b9bb [2020-10-26 20:48:17,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:48:17,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:48:17,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:17,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:48:17,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:48:17,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:17" (1/1) ... [2020-10-26 20:48:17,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d463e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:17, skipping insertion in model container [2020-10-26 20:48:17,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:17" (1/1) ... [2020-10-26 20:48:17,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:48:17,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:48:18,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:18,413 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:48:18,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:18,747 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:48:18,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18 WrapperNode [2020-10-26 20:48:18,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:18,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:48:18,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:48:18,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:48:18,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (1/1) ... [2020-10-26 20:48:18,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (1/1) ... [2020-10-26 20:48:18,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (1/1) ... [2020-10-26 20:48:18,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (1/1) ... [2020-10-26 20:48:18,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (1/1) ... [2020-10-26 20:48:18,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (1/1) ... [2020-10-26 20:48:18,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (1/1) ... [2020-10-26 20:48:18,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:48:18,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:48:18,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:48:18,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:48:18,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (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 20:48:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:48:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:48:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:48:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:48:19,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:48:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:48:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:48:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:48:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:48:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:48:19,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:48:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:48:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:48:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:48:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:48:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:48:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:48:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:48:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:48:21,034 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:48:21,034 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:48:21,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:21 BoogieIcfgContainer [2020-10-26 20:48:21,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:48:21,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:48:21,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:48:21,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:48:21,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:48:17" (1/3) ... [2020-10-26 20:48:21,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f324f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:21, skipping insertion in model container [2020-10-26 20:48:21,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:18" (2/3) ... [2020-10-26 20:48:21,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f324f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:21, skipping insertion in model container [2020-10-26 20:48:21,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:21" (3/3) ... [2020-10-26 20:48:21,047 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label33.c [2020-10-26 20:48:21,060 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:48:21,066 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:48:21,080 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:48:21,112 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:48:21,112 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:48:21,112 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:48:21,112 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:48:21,113 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:48:21,113 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:48:21,113 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:48:21,113 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:48:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:48:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-26 20:48:21,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:21,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:21,155 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1979258264, now seen corresponding path program 1 times [2020-10-26 20:48:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:21,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144038999] [2020-10-26 20:48:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:22,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:26,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:26,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 20:48:26,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:26,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4838 [2020-10-26 20:48:26,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:48:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:48:26,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:48:28,284 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 85 [2020-10-26 20:48:28,641 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 85 [2020-10-26 20:48:29,294 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 94 [2020-10-26 20:48:29,865 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 88 [2020-10-26 20:48:30,408 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 81 [2020-10-26 20:48:30,986 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 74 [2020-10-26 20:48:31,439 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 59 [2020-10-26 20:48:31,764 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:31,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:31,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:31,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:31,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:31,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:31,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:48:31,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:31,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:32,701 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 20:48:32,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144038999] [2020-10-26 20:48:32,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:32,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:48:32,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274406073] [2020-10-26 20:48:32,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:48:32,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:32,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:48:32,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:48:32,725 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:48:33,307 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:48:34,444 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 208 DAG size of output: 208 [2020-10-26 20:48:35,779 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 236 DAG size of output: 211 [2020-10-26 20:48:37,304 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 256 DAG size of output: 231 [2020-10-26 20:48:38,972 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 269 DAG size of output: 228 [2020-10-26 20:48:41,370 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 269 DAG size of output: 225 [2020-10-26 20:48:44,008 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 272 DAG size of output: 222 [2020-10-26 20:48:48,769 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 273 DAG size of output: 219 [2020-10-26 20:48:50,958 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 275 DAG size of output: 214 [2020-10-26 20:48:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:54,256 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:48:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:48:54,258 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2020-10-26 20:48:54,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:54,274 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:48:54,275 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:48:54,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:48:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:48:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:48:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:48:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:48:54,367 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 166 [2020-10-26 20:48:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:54,368 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:48:54,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:48:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:48:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 20:48:54,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:54,374 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:54,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:48:54,375 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash -787091563, now seen corresponding path program 1 times [2020-10-26 20:48:54,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:54,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098262763] [2020-10-26 20:48:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:54,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:54,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:59,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:59,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-26 20:48:59,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4960 [2020-10-26 20:48:59,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:59,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:59,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:59,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-26 20:48:59,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 20:48:59,861 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:59,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:59,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:59,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:59,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:59,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:48:59,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:59,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:59,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:59,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:59,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:00,073 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:49:00,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:00,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:00,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:00,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 20:49:00,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:00,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:49:00,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098262763] [2020-10-26 20:49:00,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:00,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:49:00,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605794484] [2020-10-26 20:49:00,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:49:00,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:00,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:49:00,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:49:00,279 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:49:00,519 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:03,509 INFO L93 Difference]: Finished difference Result 842 states and 1306 transitions. [2020-10-26 20:49:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:49:03,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2020-10-26 20:49:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:03,528 INFO L225 Difference]: With dead ends: 842 [2020-10-26 20:49:03,529 INFO L226 Difference]: Without dead ends: 598 [2020-10-26 20:49:03,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-10-26 20:49:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 595. [2020-10-26 20:49:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-26 20:49:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 856 transitions. [2020-10-26 20:49:03,600 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 856 transitions. Word has length 177 [2020-10-26 20:49:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:03,601 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 856 transitions. [2020-10-26 20:49:03,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:49:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 856 transitions. [2020-10-26 20:49:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 20:49:03,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:03,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:03,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:49:03,611 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash -722801332, now seen corresponding path program 1 times [2020-10-26 20:49:03,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:03,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137345113] [2020-10-26 20:49:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:03,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:08,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:08,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:08,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 20:49:08,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:49:08,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 20:49:08,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:08,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:49:08,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,115 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:09,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:09,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:09,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:49:09,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:09,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:09,313 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:49:09,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:09,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:09,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 20:49:09,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:09,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:09,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:09,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:49:09,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:09,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:49:09,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:09,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:09,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:49:09,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:49:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 20:49:09,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137345113] [2020-10-26 20:49:09,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:09,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:49:09,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184138697] [2020-10-26 20:49:09,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:09,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:09,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:09,533 INFO L87 Difference]: Start difference. First operand 595 states and 856 transitions. Second operand 7 states. [2020-10-26 20:49:09,826 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:13,742 INFO L93 Difference]: Finished difference Result 1566 states and 2354 transitions. [2020-10-26 20:49:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:49:13,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2020-10-26 20:49:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:13,752 INFO L225 Difference]: With dead ends: 1566 [2020-10-26 20:49:13,752 INFO L226 Difference]: Without dead ends: 1092 [2020-10-26 20:49:13,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:49:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2020-10-26 20:49:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1075. [2020-10-26 20:49:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1075 states. [2020-10-26 20:49:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1594 transitions. [2020-10-26 20:49:13,825 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1594 transitions. Word has length 186 [2020-10-26 20:49:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:13,826 INFO L481 AbstractCegarLoop]: Abstraction has 1075 states and 1594 transitions. [2020-10-26 20:49:13,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1594 transitions. [2020-10-26 20:49:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 20:49:13,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:13,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:13,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:49:13,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash -813101503, now seen corresponding path program 1 times [2020-10-26 20:49:13,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:13,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923904391] [2020-10-26 20:49:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:14,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:14,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:15,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:15,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 20:49:15,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:15,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-10-26 20:49:15,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 20:49:15,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:16,198 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:16,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:16,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:16,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:16,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:16,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:49:16,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:16,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:16,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:16,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:16,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:16,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:16,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:16,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:16,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:16,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:16,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:16,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 20:49:16,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:16,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:16,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:16,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:49:16,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:49:16,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923904391] [2020-10-26 20:49:16,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:16,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:49:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904397032] [2020-10-26 20:49:16,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:49:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:49:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:49:16,591 INFO L87 Difference]: Start difference. First operand 1075 states and 1594 transitions. Second operand 6 states. [2020-10-26 20:49:16,832 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:20,207 INFO L93 Difference]: Finished difference Result 2941 states and 4531 transitions. [2020-10-26 20:49:20,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:49:20,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2020-10-26 20:49:20,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:20,221 INFO L225 Difference]: With dead ends: 2941 [2020-10-26 20:49:20,222 INFO L226 Difference]: Without dead ends: 1987 [2020-10-26 20:49:20,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2020-10-26 20:49:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1947. [2020-10-26 20:49:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1947 states. [2020-10-26 20:49:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2917 transitions. [2020-10-26 20:49:20,299 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2917 transitions. Word has length 187 [2020-10-26 20:49:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:20,300 INFO L481 AbstractCegarLoop]: Abstraction has 1947 states and 2917 transitions. [2020-10-26 20:49:20,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:49:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2917 transitions. [2020-10-26 20:49:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-26 20:49:20,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:20,307 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:20,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:49:20,307 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:20,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1923180120, now seen corresponding path program 1 times [2020-10-26 20:49:20,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:20,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937222450] [2020-10-26 20:49:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:20,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:20,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:24,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:24,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:24,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-26 20:49:24,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:24,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4506 [2020-10-26 20:49:24,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:24,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:49:24,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:24,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-26 20:49:24,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:25,197 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:25,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:25,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:25,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:25,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:25,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:25,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:49:25,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:25,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:25,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:25,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:25,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:25,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:25,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:25,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:49:25,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:25,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:25,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:25,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:25,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:25,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:25,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:25,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:25,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 20:49:25,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:25,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 20:49:25,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:25,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:49:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:49:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937222450] [2020-10-26 20:49:25,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:25,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:25,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802431835] [2020-10-26 20:49:25,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:25,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:25,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:25,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:25,579 INFO L87 Difference]: Start difference. First operand 1947 states and 2917 transitions. Second operand 8 states. [2020-10-26 20:49:25,917 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:29,123 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:29,973 INFO L93 Difference]: Finished difference Result 5714 states and 9022 transitions. [2020-10-26 20:49:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:29,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 195 [2020-10-26 20:49:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:30,001 INFO L225 Difference]: With dead ends: 5714 [2020-10-26 20:49:30,001 INFO L226 Difference]: Without dead ends: 3888 [2020-10-26 20:49:30,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:49:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2020-10-26 20:49:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 3794. [2020-10-26 20:49:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3794 states. [2020-10-26 20:49:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 5565 transitions. [2020-10-26 20:49:30,170 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 5565 transitions. Word has length 195 [2020-10-26 20:49:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:30,170 INFO L481 AbstractCegarLoop]: Abstraction has 3794 states and 5565 transitions. [2020-10-26 20:49:30,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 5565 transitions. [2020-10-26 20:49:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-26 20:49:30,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:30,182 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:30,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:49:30,183 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash 897915420, now seen corresponding path program 1 times [2020-10-26 20:49:30,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:30,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863634843] [2020-10-26 20:49:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:30,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:30,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:32,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 20:49:32,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:32,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-26 20:49:32,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:32,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:49:32,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-26 20:49:32,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:32,482 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:32,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:32,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:32,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:32,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:32,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:49:32,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:32,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:32,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:32,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:32,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:32,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:32,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:49:32,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:49:32,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:32,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:32,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:32,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:32,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 20:49:32,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:32,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:49:32,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863634843] [2020-10-26 20:49:32,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:32,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:49:32,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395634308] [2020-10-26 20:49:32,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:49:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:49:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:49:32,847 INFO L87 Difference]: Start difference. First operand 3794 states and 5565 transitions. Second operand 6 states. [2020-10-26 20:49:33,298 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:36,618 INFO L93 Difference]: Finished difference Result 11187 states and 18112 transitions. [2020-10-26 20:49:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:49:36,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 198 [2020-10-26 20:49:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:36,670 INFO L225 Difference]: With dead ends: 11187 [2020-10-26 20:49:36,671 INFO L226 Difference]: Without dead ends: 7514 [2020-10-26 20:49:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7514 states. [2020-10-26 20:49:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7514 to 7354. [2020-10-26 20:49:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7354 states. [2020-10-26 20:49:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7354 states to 7354 states and 10033 transitions. [2020-10-26 20:49:36,974 INFO L78 Accepts]: Start accepts. Automaton has 7354 states and 10033 transitions. Word has length 198 [2020-10-26 20:49:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:36,974 INFO L481 AbstractCegarLoop]: Abstraction has 7354 states and 10033 transitions. [2020-10-26 20:49:36,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:49:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7354 states and 10033 transitions. [2020-10-26 20:49:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 20:49:36,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:36,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:36,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:49:36,995 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1664338033, now seen corresponding path program 1 times [2020-10-26 20:49:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:36,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911362584] [2020-10-26 20:49:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:37,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:37,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:39,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:41,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-26 20:49:42,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:49:42,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 20:49:42,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:42,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:42,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:49:42,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,387 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:42,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:42,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:42,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:42,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:49:42,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:42,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:42,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:42,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,545 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:49:42,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:42,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:42,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:49:42,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:42,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:42,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:49:42,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 20:49:42,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:49:42,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 20:49:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:42,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 20:49:42,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:42,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:49:42,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:42,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-26 20:49:42,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:42,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:49:42,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911362584] [2020-10-26 20:49:42,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:42,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:49:42,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168713509] [2020-10-26 20:49:42,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:42,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:42,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:42,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:42,929 INFO L87 Difference]: Start difference. First operand 7354 states and 10033 transitions. Second operand 8 states. [2020-10-26 20:49:43,186 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:45,347 INFO L93 Difference]: Finished difference Result 14509 states and 19976 transitions. [2020-10-26 20:49:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:49:45,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 212 [2020-10-26 20:49:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:45,385 INFO L225 Difference]: With dead ends: 14509 [2020-10-26 20:49:45,385 INFO L226 Difference]: Without dead ends: 7276 [2020-10-26 20:49:45,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:49:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2020-10-26 20:49:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 7252. [2020-10-26 20:49:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7252 states. [2020-10-26 20:49:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 9518 transitions. [2020-10-26 20:49:45,629 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 9518 transitions. Word has length 212 [2020-10-26 20:49:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:45,630 INFO L481 AbstractCegarLoop]: Abstraction has 7252 states and 9518 transitions. [2020-10-26 20:49:45,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 9518 transitions. [2020-10-26 20:49:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-26 20:49:45,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:45,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:45,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:49:45,653 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash -883653411, now seen corresponding path program 1 times [2020-10-26 20:49:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:45,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230851375] [2020-10-26 20:49:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:45,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:46,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:47,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:49,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-26 20:49:49,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:49,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3618 [2020-10-26 20:49:49,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:49,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:49,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:49,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 20:49:49,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:49,726 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:49,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:49,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:49,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:49,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:49:49,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:49,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:49,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:49,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:49,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:49,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:49:49,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:49,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:49,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:50,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:50,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:49:50,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:50,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 20:49:50,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:50,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:50,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:50,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:49:50,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 20:49:50,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230851375] [2020-10-26 20:49:50,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:50,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:49:50,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333445715] [2020-10-26 20:49:50,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:50,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:50,163 INFO L87 Difference]: Start difference. First operand 7252 states and 9518 transitions. Second operand 7 states. [2020-10-26 20:49:50,453 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:51,893 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:54,499 INFO L93 Difference]: Finished difference Result 17989 states and 25072 transitions. [2020-10-26 20:49:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:49:54,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 222 [2020-10-26 20:49:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:54,552 INFO L225 Difference]: With dead ends: 17989 [2020-10-26 20:49:54,552 INFO L226 Difference]: Without dead ends: 10858 [2020-10-26 20:49:54,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10858 states. [2020-10-26 20:49:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10858 to 10762. [2020-10-26 20:49:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10762 states. [2020-10-26 20:49:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10762 states to 10762 states and 13741 transitions. [2020-10-26 20:49:54,871 INFO L78 Accepts]: Start accepts. Automaton has 10762 states and 13741 transitions. Word has length 222 [2020-10-26 20:49:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:54,871 INFO L481 AbstractCegarLoop]: Abstraction has 10762 states and 13741 transitions. [2020-10-26 20:49:54,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10762 states and 13741 transitions. [2020-10-26 20:49:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-26 20:49:54,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:54,898 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:54,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:49:54,898 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash -894612047, now seen corresponding path program 1 times [2020-10-26 20:49:54,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:54,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551284515] [2020-10-26 20:49:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:55,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:55,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:56,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3247 [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:49:58,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,487 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:58,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:58,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:49:58,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:58,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:58,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:58,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:58,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:58,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:49:58,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:49:58,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:49:58,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 20:49:58,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:58,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:58,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:49:58,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:49:59,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551284515] [2020-10-26 20:49:59,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:59,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:49:59,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043748287] [2020-10-26 20:49:59,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:59,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:59,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:59,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:59,182 INFO L87 Difference]: Start difference. First operand 10762 states and 13741 transitions. Second operand 7 states. [2020-10-26 20:49:59,453 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:01,074 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:50:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:03,365 INFO L93 Difference]: Finished difference Result 26635 states and 34220 transitions. [2020-10-26 20:50:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:50:03,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-10-26 20:50:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:03,422 INFO L225 Difference]: With dead ends: 26635 [2020-10-26 20:50:03,423 INFO L226 Difference]: Without dead ends: 15994 [2020-10-26 20:50:03,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:50:03,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15994 states. [2020-10-26 20:50:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15994 to 15978. [2020-10-26 20:50:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15978 states. [2020-10-26 20:50:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15978 states to 15978 states and 20390 transitions. [2020-10-26 20:50:03,828 INFO L78 Accepts]: Start accepts. Automaton has 15978 states and 20390 transitions. Word has length 232 [2020-10-26 20:50:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:03,828 INFO L481 AbstractCegarLoop]: Abstraction has 15978 states and 20390 transitions. [2020-10-26 20:50:03,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 15978 states and 20390 transitions. [2020-10-26 20:50:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-26 20:50:03,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:03,869 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:03,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:50:03,869 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash -309692051, now seen corresponding path program 1 times [2020-10-26 20:50:03,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:03,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240928642] [2020-10-26 20:50:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:03,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:04,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:07,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:08,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:08,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-26 20:50:08,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:08,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 20:50:08,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:50:08,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,200 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:09,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:09,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:09,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:09,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:50:09,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:09,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:09,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:09,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 20:50:09,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:09,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:09,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:09,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:09,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:50:09,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:50:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:09,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:50:09,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:09,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:50:09,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:50:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:09,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 84 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:50:09,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240928642] [2020-10-26 20:50:09,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:09,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:50:09,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100929946] [2020-10-26 20:50:09,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:09,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:09,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:09,908 INFO L87 Difference]: Start difference. First operand 15978 states and 20390 transitions. Second operand 8 states. [2020-10-26 20:50:10,177 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:12,431 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:50:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:14,313 INFO L93 Difference]: Finished difference Result 44624 states and 57922 transitions. [2020-10-26 20:50:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:50:14,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 254 [2020-10-26 20:50:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:14,425 INFO L225 Difference]: With dead ends: 44624 [2020-10-26 20:50:14,425 INFO L226 Difference]: Without dead ends: 28767 [2020-10-26 20:50:14,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:50:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28767 states. [2020-10-26 20:50:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28767 to 28504. [2020-10-26 20:50:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28504 states. [2020-10-26 20:50:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28504 states to 28504 states and 36130 transitions. [2020-10-26 20:50:15,212 INFO L78 Accepts]: Start accepts. Automaton has 28504 states and 36130 transitions. Word has length 254 [2020-10-26 20:50:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:15,213 INFO L481 AbstractCegarLoop]: Abstraction has 28504 states and 36130 transitions. [2020-10-26 20:50:15,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 28504 states and 36130 transitions. [2020-10-26 20:50:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-26 20:50:15,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:15,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:15,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:50:15,278 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:15,279 INFO L82 PathProgramCache]: Analyzing trace with hash -696734886, now seen corresponding path program 1 times [2020-10-26 20:50:15,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:15,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010962550] [2020-10-26 20:50:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:15,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:17,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-26 20:50:20,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:20,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 20:50:20,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:50:20,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:20,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:50:20,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:20,772 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:20,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:20,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:50:20,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:20,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:20,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:20,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:20,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:20,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:20,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:20,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:50:20,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:50:20,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:20,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:20,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:20,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:21,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:21,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:21,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:50:21,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 20:50:21,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:50:21,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:21,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:50:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:21,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:21,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:21,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:50:21,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:21,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 20:50:21,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:50:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:21,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 20:50:21,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010962550] [2020-10-26 20:50:21,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:21,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:50:21,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140245579] [2020-10-26 20:50:21,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:50:21,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:21,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:50:21,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:50:21,338 INFO L87 Difference]: Start difference. First operand 28504 states and 36130 transitions. Second operand 10 states. [2020-10-26 20:50:21,632 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:22,043 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:50:24,704 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 160 [2020-10-26 20:50:27,978 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:50:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:28,789 INFO L93 Difference]: Finished difference Result 87210 states and 115790 transitions. [2020-10-26 20:50:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 20:50:28,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 257 [2020-10-26 20:50:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:29,032 INFO L225 Difference]: With dead ends: 87210 [2020-10-26 20:50:29,032 INFO L226 Difference]: Without dead ends: 58827 [2020-10-26 20:50:29,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-26 20:50:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58827 states. [2020-10-26 20:50:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58827 to 57987. [2020-10-26 20:50:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57987 states. [2020-10-26 20:50:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57987 states to 57987 states and 74689 transitions. [2020-10-26 20:50:31,202 INFO L78 Accepts]: Start accepts. Automaton has 57987 states and 74689 transitions. Word has length 257 [2020-10-26 20:50:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:31,202 INFO L481 AbstractCegarLoop]: Abstraction has 57987 states and 74689 transitions. [2020-10-26 20:50:31,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:50:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 57987 states and 74689 transitions. [2020-10-26 20:50:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-26 20:50:31,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:31,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:31,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:50:31,430 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:31,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:31,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1890879028, now seen corresponding path program 1 times [2020-10-26 20:50:31,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:31,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075082907] [2020-10-26 20:50:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:31,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:34,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:34,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:34,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-26 20:50:34,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:50:34,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3084 [2020-10-26 20:50:34,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:50:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-26 20:50:34,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:35,055 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:35,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:35,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:35,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:35,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:35,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:50:35,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:35,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:35,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:35,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:50:35,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-26 20:50:35,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:50:35,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:35,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:50:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:35,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:35,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:35,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:50:35,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:35,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:50:35,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075082907] [2020-10-26 20:50:35,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:35,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:50:35,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412553986] [2020-10-26 20:50:35,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:35,830 INFO L87 Difference]: Start difference. First operand 57987 states and 74689 transitions. Second operand 7 states. [2020-10-26 20:50:36,103 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:36,701 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 20:50:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:41,595 INFO L93 Difference]: Finished difference Result 179691 states and 238715 transitions. [2020-10-26 20:50:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:50:41,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 277 [2020-10-26 20:50:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:42,119 INFO L225 Difference]: With dead ends: 179691 [2020-10-26 20:50:42,119 INFO L226 Difference]: Without dead ends: 121827 [2020-10-26 20:50:42,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:50:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121827 states. [2020-10-26 20:50:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121827 to 99641. [2020-10-26 20:50:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99641 states. [2020-10-26 20:50:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99641 states to 99641 states and 135150 transitions. [2020-10-26 20:50:46,253 INFO L78 Accepts]: Start accepts. Automaton has 99641 states and 135150 transitions. Word has length 277 [2020-10-26 20:50:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:46,254 INFO L481 AbstractCegarLoop]: Abstraction has 99641 states and 135150 transitions. [2020-10-26 20:50:46,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 99641 states and 135150 transitions. [2020-10-26 20:50:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-26 20:50:46,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:46,336 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:46,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:50:46,336 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash -944145217, now seen corresponding path program 1 times [2020-10-26 20:50:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:46,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705625590] [2020-10-26 20:50:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:46,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:47,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:48,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:48,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:51,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:51,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-26 20:50:51,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 20:50:51,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 20:50:51,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 20:50:51,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:51,883 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:51,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:51,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:51,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:51,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:51,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:50:51,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:51,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:50:52,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:52,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-26 20:50:52,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:52,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:52,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 20:50:52,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:50:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:50:52,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:52,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:50:52,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:52,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:50:52,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:52,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 20:50:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:50:52,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:50:52,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:52,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-26 20:50:52,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:52,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 20:50:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 20:50:52,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:50:52,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-26 20:50:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:52,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 141 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-26 20:50:52,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705625590] [2020-10-26 20:50:52,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:52,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:50:52,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412780064] [2020-10-26 20:50:52,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:50:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:50:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:50:52,479 INFO L87 Difference]: Start difference. First operand 99641 states and 135150 transitions. Second operand 5 states. [2020-10-26 20:50:52,790 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:55,481 INFO L93 Difference]: Finished difference Result 199226 states and 270278 transitions. [2020-10-26 20:50:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:50:55,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2020-10-26 20:50:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:56,383 INFO L225 Difference]: With dead ends: 199226 [2020-10-26 20:50:56,383 INFO L226 Difference]: Without dead ends: 99917 [2020-10-26 20:50:56,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:50:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99917 states. [2020-10-26 20:50:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99917 to 99609. [2020-10-26 20:50:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99609 states. [2020-10-26 20:50:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99609 states to 99609 states and 135044 transitions. [2020-10-26 20:50:59,460 INFO L78 Accepts]: Start accepts. Automaton has 99609 states and 135044 transitions. Word has length 310 [2020-10-26 20:50:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:59,461 INFO L481 AbstractCegarLoop]: Abstraction has 99609 states and 135044 transitions. [2020-10-26 20:50:59,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:50:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 99609 states and 135044 transitions. [2020-10-26 20:50:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-26 20:50:59,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:59,533 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:59,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:50:59,533 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1204354096, now seen corresponding path program 1 times [2020-10-26 20:50:59,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:59,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790615281] [2020-10-26 20:50:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:59,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:00,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:01,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:02,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:04,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:04,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-26 20:51:04,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:51:04,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 20:51:04,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:51:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:04,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-26 20:51:04,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:05,159 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:05,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:05,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:05,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:05,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:05,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:05,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:51:05,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:05,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:05,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:05,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:05,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:05,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:51:05,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:05,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-26 20:51:05,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:05,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:05,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:05,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:51:05,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:05,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:51:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:05,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:05,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:51:05,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:05,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 20:51:05,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:51:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:05,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:51:05,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:05,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-10-26 20:51:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:05,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:05,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:05,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:05,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:05,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:51:05,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:05,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:05,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:05,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:51:05,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 173 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 20:51:06,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790615281] [2020-10-26 20:51:06,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:06,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:51:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18559014] [2020-10-26 20:51:06,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 20:51:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 20:51:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:51:06,044 INFO L87 Difference]: Start difference. First operand 99609 states and 135044 transitions. Second operand 11 states. [2020-10-26 20:51:06,297 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:51:06,647 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:51:07,453 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:51:09,743 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:51:11,782 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:51:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:18,525 INFO L93 Difference]: Finished difference Result 401438 states and 554256 transitions. [2020-10-26 20:51:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 20:51:18,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 315 [2020-10-26 20:51:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:19,806 INFO L225 Difference]: With dead ends: 401438 [2020-10-26 20:51:19,807 INFO L226 Difference]: Without dead ends: 302161 [2020-10-26 20:51:19,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 20:51:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302161 states. [2020-10-26 20:51:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302161 to 283144. [2020-10-26 20:51:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283144 states. [2020-10-26 20:51:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283144 states to 283144 states and 369523 transitions. [2020-10-26 20:51:28,399 INFO L78 Accepts]: Start accepts. Automaton has 283144 states and 369523 transitions. Word has length 315 [2020-10-26 20:51:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:28,400 INFO L481 AbstractCegarLoop]: Abstraction has 283144 states and 369523 transitions. [2020-10-26 20:51:28,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 20:51:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 283144 states and 369523 transitions. [2020-10-26 20:51:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-26 20:51:28,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:28,510 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:28,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:51:28,510 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:28,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1006086182, now seen corresponding path program 1 times [2020-10-26 20:51:28,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:28,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674090079] [2020-10-26 20:51:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:28,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:28,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:29,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:31,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:33,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:33,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-26 20:51:33,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:51:33,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 20:51:33,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:33,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:51:33,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:33,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-26 20:51:33,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:33,887 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:33,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:33,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:33,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:33,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:33,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:33,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:51:33,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:33,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:33,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:33,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:34,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:34,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:34,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:51:34,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:34,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:51:34,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:34,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:34,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:34,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:51:34,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:34,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:51:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:34,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:34,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:34,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-26 20:51:34,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:34,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-26 20:51:34,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:34,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-26 20:51:34,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:51:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674090079] [2020-10-26 20:51:34,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:34,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:51:34,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11099067] [2020-10-26 20:51:34,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:51:34,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:34,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:51:34,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:51:34,515 INFO L87 Difference]: Start difference. First operand 283144 states and 369523 transitions. Second operand 7 states.