/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:22:43,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:22:43,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:22:43,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:22:43,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:22:43,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:22:43,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:22:43,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:22:43,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:22:43,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:22:43,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:22:43,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:22:43,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:22:43,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:22:43,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:22:43,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:22:43,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:22:43,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:22:43,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:22:43,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:22:43,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:22:43,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:22:43,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:22:43,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:22:43,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 19:22:43,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 19:22:43,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 19:22:43,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 19:22:43,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 19:22:43,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 19:22:43,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 19:22:43,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 19:22:43,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 19:22:43,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 19:22:43,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 19:22:43,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 19:22:43,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 19:22:43,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 19:22:43,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:22:43,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:22:43,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:22:43,856 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 [2020-08-18 19:22:43,879 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:22:43,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:22:43,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:22:43,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:22:43,883 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:22:43,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:22:43,883 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:22:43,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:22:43,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:22:43,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:22:43,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:22:43,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:22:43,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:22:43,885 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:22:43,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:22:43,885 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:22:43,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:22:43,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:22:43,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:22:43,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:22:43,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:22:43,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:22:43,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:22:43,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:22:43,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:22:43,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:22:43,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:22:43,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:22:43,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:22:43,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:22:44,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:22:44,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:22:44,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:22:44,230 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:22:44,230 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:22:44,231 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-18 19:22:44,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e890ef0d3/83a61139804f4d44a7a8a2ad39ed92d6/FLAGde0104d1a [2020-08-18 19:22:44,892 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:22:44,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-18 19:22:44,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e890ef0d3/83a61139804f4d44a7a8a2ad39ed92d6/FLAGde0104d1a [2020-08-18 19:22:45,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e890ef0d3/83a61139804f4d44a7a8a2ad39ed92d6 [2020-08-18 19:22:45,156 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:22:45,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:22:45,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:22:45,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:22:45,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:22:45,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:45,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f51854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45, skipping insertion in model container [2020-08-18 19:22:45,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:45,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:22:45,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:22:45,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:22:45,747 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:22:45,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:22:45,912 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:22:45,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45 WrapperNode [2020-08-18 19:22:45,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:22:45,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:22:45,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:22:45,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:22:45,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:45,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:45,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:45,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:45,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:46,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:46,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (1/1) ... [2020-08-18 19:22:46,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:22:46,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:22:46,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:22:46,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:22:46,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (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 [2020-08-18 19:22:46,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:22:46,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:22:46,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 19:22:46,105 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 19:22:46,106 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 19:22:46,106 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 19:22:46,106 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 19:22:46,106 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 19:22:46,106 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 19:22:46,107 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 19:22:46,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 19:22:46,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 19:22:46,108 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 19:22:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 19:22:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 19:22:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 19:22:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 19:22:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 19:22:46,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 19:22:46,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 19:22:46,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 19:22:46,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 19:22:46,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 19:22:46,112 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 19:22:46,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 19:22:46,113 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 19:22:46,113 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 19:22:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 19:22:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 19:22:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:22:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 19:22:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 19:22:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 19:22:46,115 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 19:22:46,115 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 19:22:46,115 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 19:22:46,115 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 19:22:46,115 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 19:22:46,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 19:22:46,116 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 19:22:46,116 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 19:22:46,116 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 19:22:46,116 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 19:22:46,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:22:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:22:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 19:22:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 19:22:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 19:22:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 19:22:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 19:22:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 19:22:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 19:22:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 19:22:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 19:22:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 19:22:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 19:22:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 19:22:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 19:22:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 19:22:46,120 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 19:22:46,120 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 19:22:46,120 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 19:22:46,120 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 19:22:46,120 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 19:22:46,120 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 19:22:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 19:22:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:22:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 19:22:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 19:22:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 19:22:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 19:22:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 19:22:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 19:22:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:22:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 19:22:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 19:22:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:22:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 19:22:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 19:22:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:22:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 19:22:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 19:22:46,126 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 19:22:46,126 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 19:22:46,126 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 19:22:46,127 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 19:22:46,127 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 19:22:46,127 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 19:22:46,128 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 19:22:46,128 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 19:22:46,128 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 19:22:46,128 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 19:22:46,128 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 19:22:46,128 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 19:22:46,129 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 19:22:46,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:22:46,129 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 19:22:46,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:22:46,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 19:22:46,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:22:47,324 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:22:47,324 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 19:22:47,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:22:47 BoogieIcfgContainer [2020-08-18 19:22:47,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:22:47,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:22:47,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:22:47,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:22:47,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:22:45" (1/3) ... [2020-08-18 19:22:47,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2f5f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:22:47, skipping insertion in model container [2020-08-18 19:22:47,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:22:45" (2/3) ... [2020-08-18 19:22:47,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2f5f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:22:47, skipping insertion in model container [2020-08-18 19:22:47,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:22:47" (3/3) ... [2020-08-18 19:22:47,338 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2020-08-18 19:22:47,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:22:47,356 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:22:47,370 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:22:47,393 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:22:47,393 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:22:47,394 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:22:47,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:22:47,395 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:22:47,395 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:22:47,395 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:22:47,395 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:22:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-08-18 19:22:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 19:22:47,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:47,431 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] [2020-08-18 19:22:47,431 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:47,438 INFO L82 PathProgramCache]: Analyzing trace with hash -559348317, now seen corresponding path program 1 times [2020-08-18 19:22:47,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:47,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240166574] [2020-08-18 19:22:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:48,143 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:48,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:48,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:48,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:48,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:48,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:48,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 19:22:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:48,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 19:22:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:48,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240166574] [2020-08-18 19:22:48,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:48,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:22:48,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861528548] [2020-08-18 19:22:48,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:22:48,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:22:48,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:22:48,321 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2020-08-18 19:22:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:49,692 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2020-08-18 19:22:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:22:49,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 19:22:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:49,710 INFO L225 Difference]: With dead ends: 358 [2020-08-18 19:22:49,711 INFO L226 Difference]: Without dead ends: 193 [2020-08-18 19:22:49,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:22:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-18 19:22:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2020-08-18 19:22:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 19:22:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2020-08-18 19:22:49,816 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 46 [2020-08-18 19:22:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:49,817 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2020-08-18 19:22:49,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:22:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2020-08-18 19:22:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 19:22:49,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:49,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:22:49,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:22:49,821 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:49,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1620740414, now seen corresponding path program 1 times [2020-08-18 19:22:49,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:49,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896042997] [2020-08-18 19:22:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,140 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:50,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:22:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 19:22:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:50,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896042997] [2020-08-18 19:22:50,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:50,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:22:50,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104643770] [2020-08-18 19:22:50,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:22:50,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:22:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:22:50,211 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 4 states. [2020-08-18 19:22:50,632 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:51,679 INFO L93 Difference]: Finished difference Result 281 states and 343 transitions. [2020-08-18 19:22:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:22:51,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 19:22:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:51,685 INFO L225 Difference]: With dead ends: 281 [2020-08-18 19:22:51,685 INFO L226 Difference]: Without dead ends: 177 [2020-08-18 19:22:51,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:22:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-18 19:22:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2020-08-18 19:22:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-18 19:22:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2020-08-18 19:22:51,736 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 47 [2020-08-18 19:22:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:51,737 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2020-08-18 19:22:51,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:22:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2020-08-18 19:22:51,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 19:22:51,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:51,740 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] [2020-08-18 19:22:51,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:22:51,740 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:51,740 INFO L82 PathProgramCache]: Analyzing trace with hash -396868600, now seen corresponding path program 1 times [2020-08-18 19:22:51,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:51,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436923316] [2020-08-18 19:22:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:52,067 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:52,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:52,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:52,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:52,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:52,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 19:22:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:52,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 19:22:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:52,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436923316] [2020-08-18 19:22:52,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:52,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 19:22:52,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054347446] [2020-08-18 19:22:52,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 19:22:52,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:52,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 19:22:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:22:52,159 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 8 states. [2020-08-18 19:22:52,539 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:22:52,858 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:53,093 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:53,320 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:54,090 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:22:56,316 INFO L93 Difference]: Finished difference Result 500 states and 619 transitions. [2020-08-18 19:22:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:22:56,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 19:22:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:22:56,322 INFO L225 Difference]: With dead ends: 500 [2020-08-18 19:22:56,323 INFO L226 Difference]: Without dead ends: 377 [2020-08-18 19:22:56,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 19:22:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-18 19:22:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 308. [2020-08-18 19:22:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-08-18 19:22:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2020-08-18 19:22:56,407 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 52 [2020-08-18 19:22:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:22:56,408 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2020-08-18 19:22:56,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 19:22:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2020-08-18 19:22:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 19:22:56,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:22:56,411 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] [2020-08-18 19:22:56,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:22:56,411 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:22:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:22:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1317156286, now seen corresponding path program 1 times [2020-08-18 19:22:56,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:22:56,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481438362] [2020-08-18 19:22:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:22:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,726 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:22:56,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:22:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:22:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:22:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:22:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:22:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:22:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 19:22:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 19:22:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:22:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:22:56,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481438362] [2020-08-18 19:22:56,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:22:56,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 19:22:56,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429639588] [2020-08-18 19:22:56,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:22:56,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:22:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:22:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:22:56,877 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand 12 states. [2020-08-18 19:22:57,412 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:22:57,717 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:57,991 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:58,225 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:58,752 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:22:59,626 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:22:59,990 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:23:00,338 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:23:00,610 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:00,937 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:01,319 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:23:01,715 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:23:02,133 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:04,550 INFO L93 Difference]: Finished difference Result 1257 states and 1722 transitions. [2020-08-18 19:23:04,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 19:23:04,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-18 19:23:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:04,566 INFO L225 Difference]: With dead ends: 1257 [2020-08-18 19:23:04,566 INFO L226 Difference]: Without dead ends: 973 [2020-08-18 19:23:04,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-18 19:23:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-08-18 19:23:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 872. [2020-08-18 19:23:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-18 19:23:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1114 transitions. [2020-08-18 19:23:04,815 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1114 transitions. Word has length 57 [2020-08-18 19:23:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:04,816 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1114 transitions. [2020-08-18 19:23:04,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:23:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1114 transitions. [2020-08-18 19:23:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 19:23:04,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:04,828 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] [2020-08-18 19:23:04,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:23:04,829 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:04,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1811637144, now seen corresponding path program 1 times [2020-08-18 19:23:04,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:04,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691271514] [2020-08-18 19:23:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,176 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:05,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:23:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 19:23:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 19:23:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 19:23:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:23:05,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691271514] [2020-08-18 19:23:05,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:23:05,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 19:23:05,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990899181] [2020-08-18 19:23:05,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 19:23:05,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 19:23:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:23:05,267 INFO L87 Difference]: Start difference. First operand 872 states and 1114 transitions. Second operand 6 states. [2020-08-18 19:23:05,762 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:07,958 INFO L93 Difference]: Finished difference Result 2053 states and 2819 transitions. [2020-08-18 19:23:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 19:23:07,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 19:23:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:07,970 INFO L225 Difference]: With dead ends: 2053 [2020-08-18 19:23:07,971 INFO L226 Difference]: Without dead ends: 1205 [2020-08-18 19:23:07,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:23:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-08-18 19:23:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1114. [2020-08-18 19:23:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2020-08-18 19:23:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1402 transitions. [2020-08-18 19:23:08,322 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1402 transitions. Word has length 61 [2020-08-18 19:23:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:08,323 INFO L479 AbstractCegarLoop]: Abstraction has 1114 states and 1402 transitions. [2020-08-18 19:23:08,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 19:23:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1402 transitions. [2020-08-18 19:23:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 19:23:08,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:08,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:23:08,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:23:08,332 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:08,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1078445760, now seen corresponding path program 1 times [2020-08-18 19:23:08,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:08,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8626639] [2020-08-18 19:23:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,729 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:08,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 19:23:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:23:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 19:23:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 19:23:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 19:23:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 19:23:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 19:23:08,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8626639] [2020-08-18 19:23:08,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:08,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 19:23:08,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004993360] [2020-08-18 19:23:08,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 19:23:08,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 19:23:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:23:08,886 INFO L87 Difference]: Start difference. First operand 1114 states and 1402 transitions. Second operand 10 states. [2020-08-18 19:23:09,615 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-18 19:23:10,275 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:12,303 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:14,603 INFO L93 Difference]: Finished difference Result 2165 states and 2849 transitions. [2020-08-18 19:23:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 19:23:14,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-18 19:23:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:14,619 INFO L225 Difference]: With dead ends: 2165 [2020-08-18 19:23:14,619 INFO L226 Difference]: Without dead ends: 1340 [2020-08-18 19:23:14,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-18 19:23:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2020-08-18 19:23:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1227. [2020-08-18 19:23:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-18 19:23:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1523 transitions. [2020-08-18 19:23:14,873 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1523 transitions. Word has length 89 [2020-08-18 19:23:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:14,875 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1523 transitions. [2020-08-18 19:23:14,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 19:23:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1523 transitions. [2020-08-18 19:23:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 19:23:14,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:14,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:23:14,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:23:14,880 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1688312402, now seen corresponding path program 1 times [2020-08-18 19:23:14,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:14,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254731776] [2020-08-18 19:23:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,136 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:15,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:23:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 19:23:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 19:23:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 19:23:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:23:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-18 19:23:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 19:23:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 19:23:15,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254731776] [2020-08-18 19:23:15,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:15,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 19:23:15,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441043517] [2020-08-18 19:23:15,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 19:23:15,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:15,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 19:23:15,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:23:15,327 INFO L87 Difference]: Start difference. First operand 1227 states and 1523 transitions. Second operand 10 states. [2020-08-18 19:23:16,478 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:16,757 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 19:23:17,022 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:17,271 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:18,374 INFO L93 Difference]: Finished difference Result 2574 states and 3341 transitions. [2020-08-18 19:23:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:23:18,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-18 19:23:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:18,384 INFO L225 Difference]: With dead ends: 2574 [2020-08-18 19:23:18,384 INFO L226 Difference]: Without dead ends: 1371 [2020-08-18 19:23:18,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:23:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2020-08-18 19:23:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1257. [2020-08-18 19:23:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1257 states. [2020-08-18 19:23:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1557 transitions. [2020-08-18 19:23:18,697 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1557 transitions. Word has length 133 [2020-08-18 19:23:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:18,697 INFO L479 AbstractCegarLoop]: Abstraction has 1257 states and 1557 transitions. [2020-08-18 19:23:18,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 19:23:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1557 transitions. [2020-08-18 19:23:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-18 19:23:18,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:18,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:23:18,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:23:18,704 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:18,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1621468459, now seen corresponding path program 1 times [2020-08-18 19:23:18,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:18,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385879048] [2020-08-18 19:23:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,007 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:19,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 19:23:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:23:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 19:23:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 19:23:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 19:23:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:23:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 19:23:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 19:23:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 19:23:19,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385879048] [2020-08-18 19:23:19,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:19,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 19:23:19,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893435318] [2020-08-18 19:23:19,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 19:23:19,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:19,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 19:23:19,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 19:23:19,219 INFO L87 Difference]: Start difference. First operand 1257 states and 1557 transitions. Second operand 13 states. [2020-08-18 19:23:19,721 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:20,450 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:22,851 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:23,127 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:23,428 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:23,679 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:23,941 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:24,192 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:24,435 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:24,681 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:24,947 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:25,190 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:26,163 INFO L93 Difference]: Finished difference Result 3807 states and 4924 transitions. [2020-08-18 19:23:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 19:23:26,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-08-18 19:23:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:26,178 INFO L225 Difference]: With dead ends: 3807 [2020-08-18 19:23:26,178 INFO L226 Difference]: Without dead ends: 2574 [2020-08-18 19:23:26,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 19:23:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2020-08-18 19:23:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2369. [2020-08-18 19:23:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2369 states. [2020-08-18 19:23:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 2892 transitions. [2020-08-18 19:23:26,611 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 2892 transitions. Word has length 137 [2020-08-18 19:23:26,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:26,612 INFO L479 AbstractCegarLoop]: Abstraction has 2369 states and 2892 transitions. [2020-08-18 19:23:26,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 19:23:26,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 2892 transitions. [2020-08-18 19:23:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-18 19:23:26,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:26,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:23:26,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:23:26,623 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash -671261639, now seen corresponding path program 1 times [2020-08-18 19:23:26,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:26,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033008012] [2020-08-18 19:23:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,925 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:26,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 19:23:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 19:23:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 19:23:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:26,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 19:23:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 19:23:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 19:23:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:23:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 19:23:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 19:23:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 19:23:27,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033008012] [2020-08-18 19:23:27,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:27,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 19:23:27,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776699204] [2020-08-18 19:23:27,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 19:23:27,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:27,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 19:23:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:23:27,071 INFO L87 Difference]: Start difference. First operand 2369 states and 2892 transitions. Second operand 11 states. [2020-08-18 19:23:27,759 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:30,388 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:30,716 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:30,964 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:31,273 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:31,551 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:32,225 INFO L93 Difference]: Finished difference Result 2879 states and 3812 transitions. [2020-08-18 19:23:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 19:23:32,226 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-08-18 19:23:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:32,244 INFO L225 Difference]: With dead ends: 2879 [2020-08-18 19:23:32,244 INFO L226 Difference]: Without dead ends: 2876 [2020-08-18 19:23:32,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-08-18 19:23:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2020-08-18 19:23:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2369. [2020-08-18 19:23:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2369 states. [2020-08-18 19:23:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 2882 transitions. [2020-08-18 19:23:32,657 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 2882 transitions. Word has length 141 [2020-08-18 19:23:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:32,658 INFO L479 AbstractCegarLoop]: Abstraction has 2369 states and 2882 transitions. [2020-08-18 19:23:32,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 19:23:32,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 2882 transitions. [2020-08-18 19:23:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 19:23:32,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:32,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 19:23:32,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:23:32,666 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:32,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1238254012, now seen corresponding path program 1 times [2020-08-18 19:23:32,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:32,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818109177] [2020-08-18 19:23:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:32,935 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:32,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:32,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:32,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:32,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:32,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:32,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:23:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 19:23:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 19:23:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 19:23:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 19:23:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-18 19:23:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 19:23:33,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818109177] [2020-08-18 19:23:33,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:33,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 19:23:33,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287542319] [2020-08-18 19:23:33,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:23:33,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:33,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:23:33,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:23:33,175 INFO L87 Difference]: Start difference. First operand 2369 states and 2882 transitions. Second operand 12 states. [2020-08-18 19:23:33,957 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:34,190 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:34,410 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:35,201 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:35,515 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:35,738 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:23:37,027 INFO L93 Difference]: Finished difference Result 4364 states and 5483 transitions. [2020-08-18 19:23:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 19:23:37,027 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2020-08-18 19:23:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:23:37,038 INFO L225 Difference]: With dead ends: 4364 [2020-08-18 19:23:37,038 INFO L226 Difference]: Without dead ends: 2019 [2020-08-18 19:23:37,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 19:23:37,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2020-08-18 19:23:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1917. [2020-08-18 19:23:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-08-18 19:23:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2278 transitions. [2020-08-18 19:23:37,423 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2278 transitions. Word has length 146 [2020-08-18 19:23:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:23:37,424 INFO L479 AbstractCegarLoop]: Abstraction has 1917 states and 2278 transitions. [2020-08-18 19:23:37,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:23:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2278 transitions. [2020-08-18 19:23:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 19:23:37,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:23:37,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:23:37,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 19:23:37,430 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:23:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:23:37,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1745517035, now seen corresponding path program 1 times [2020-08-18 19:23:37,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:23:37,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430539469] [2020-08-18 19:23:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:23:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,793 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 19:23:37,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:23:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:23:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 19:23:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 19:23:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 19:23:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 19:23:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:23:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 19:23:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 19:23:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 19:23:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 19:23:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:37,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:23:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 19:23:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 19:23:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:23:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 19:23:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-18 19:23:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:23:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 19:23:38,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430539469] [2020-08-18 19:23:38,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:23:38,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 19:23:38,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369716174] [2020-08-18 19:23:38,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:23:38,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:23:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:23:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:23:38,085 INFO L87 Difference]: Start difference. First operand 1917 states and 2278 transitions. Second operand 12 states. [2020-08-18 19:23:38,771 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 19:23:39,722 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 19:23:40,013 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:23:40,273 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:23:40,504 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:40,926 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:41,180 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 19:23:42,161 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 19:23:42,431 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 19:23:42,702 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 190