/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:36:23,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:36:23,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:36:24,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:36:24,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:36:24,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:36:24,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:36:24,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:36:24,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:36:24,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:36:24,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:36:24,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:36:24,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:36:24,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:36:24,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:36:24,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:36:24,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:36:24,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:36:24,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:36:24,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:36:24,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:36:24,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:36:24,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:36:24,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:36:24,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:36:24,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:36:24,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:36:24,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:36:24,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:36:24,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:36:24,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:36:24,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:36:24,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:36:24,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:36:24,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:36:24,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:36:24,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:36:24,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:36:24,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:36:24,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:36:24,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:36:24,072 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 [2020-08-21 15:36:24,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:36:24,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:36:24,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:36:24,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:36:24,122 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:36:24,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:36:24,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:36:24,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:36:24,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:36:24,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:36:24,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:36:24,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:36:24,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:36:24,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:36:24,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:36:24,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:36:24,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:36:24,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:36:24,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:36:24,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:36:24,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:36:24,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:36:24,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:36:24,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:36:24,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:36:24,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:36:24,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:36:24,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:36:24,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:36:24,128 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=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:36:24,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:36:24,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:36:24,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:36:24,469 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:36:24,469 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:36:24,470 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c [2020-08-21 15:36:24,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0abee023/a95d05a35a5d40ef819139ca74869c05/FLAGea074c538 [2020-08-21 15:36:25,120 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:36:25,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c [2020-08-21 15:36:25,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0abee023/a95d05a35a5d40ef819139ca74869c05/FLAGea074c538 [2020-08-21 15:36:25,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0abee023/a95d05a35a5d40ef819139ca74869c05 [2020-08-21 15:36:25,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:36:25,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:36:25,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:36:25,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:36:25,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:36:25,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:36:25" (1/1) ... [2020-08-21 15:36:25,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e7b983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:25, skipping insertion in model container [2020-08-21 15:36:25,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:36:25" (1/1) ... [2020-08-21 15:36:25,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:36:25,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:36:25,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:36:25,919 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:36:26,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:36:26,079 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:36:26,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26 WrapperNode [2020-08-21 15:36:26,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:36:26,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:36:26,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:36:26,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:36:26,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (1/1) ... [2020-08-21 15:36:26,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (1/1) ... [2020-08-21 15:36:26,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (1/1) ... [2020-08-21 15:36:26,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (1/1) ... [2020-08-21 15:36:26,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (1/1) ... [2020-08-21 15:36:26,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (1/1) ... [2020-08-21 15:36:26,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (1/1) ... [2020-08-21 15:36:26,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:36:26,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:36:26,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:36:26,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:36:26,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (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 [2020-08-21 15:36:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:36:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:36:26,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 15:36:26,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 15:36:26,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 15:36:26,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 15:36:26,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 15:36:26,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 15:36:26,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 15:36:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 15:36:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 15:36:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 15:36:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 15:36:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 15:36:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 15:36:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:36:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 15:36:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 15:36:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 15:36:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 15:36:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-21 15:36:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 15:36:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 15:36:26,260 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 15:36:26,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 15:36:26,261 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 15:36:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 15:36:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 15:36:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 15:36:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 15:36:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 15:36:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 15:36:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 15:36:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 15:36:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 15:36:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 15:36:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 15:36:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 15:36:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 15:36:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 15:36:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 15:36:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:36:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:36:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 15:36:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 15:36:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 15:36:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 15:36:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 15:36:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 15:36:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 15:36:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 15:36:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 15:36:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 15:36:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 15:36:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:36:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 15:36:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 15:36:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:36:26,268 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 15:36:26,268 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 15:36:26,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:36:26,268 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 15:36:26,268 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 15:36:26,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:36:26,268 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 15:36:26,269 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 15:36:26,269 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 15:36:26,269 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 15:36:26,269 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 15:36:26,269 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 15:36:26,269 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 15:36:26,269 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 15:36:26,270 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 15:36:26,270 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 15:36:26,270 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 15:36:26,270 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 15:36:26,270 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 15:36:26,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:36:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 15:36:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 15:36:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 15:36:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 15:36:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 15:36:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 15:36:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 15:36:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 15:36:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 15:36:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 15:36:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 15:36:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 15:36:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 15:36:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-21 15:36:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 15:36:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:36:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 15:36:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:36:27,303 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:36:27,304 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 15:36:27,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:36:27 BoogieIcfgContainer [2020-08-21 15:36:27,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:36:27,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:36:27,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:36:27,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:36:27,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:36:25" (1/3) ... [2020-08-21 15:36:27,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f2ef7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:36:27, skipping insertion in model container [2020-08-21 15:36:27,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:36:26" (2/3) ... [2020-08-21 15:36:27,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f2ef7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:36:27, skipping insertion in model container [2020-08-21 15:36:27,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:36:27" (3/3) ... [2020-08-21 15:36:27,318 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product48.cil.c [2020-08-21 15:36:27,329 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:36:27,337 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:36:27,352 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:36:27,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:36:27,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:36:27,379 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:36:27,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:36:27,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:36:27,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:36:27,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:36:27,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:36:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-08-21 15:36:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 15:36:27,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:27,414 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] [2020-08-21 15:36:27,415 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash 267821041, now seen corresponding path program 1 times [2020-08-21 15:36:27,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:27,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902128152] [2020-08-21 15:36:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:28,189 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:28,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:28,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:28,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:28,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:28,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:28,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 15:36:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:28,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 15:36:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:36:28,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902128152] [2020-08-21 15:36:28,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:36:28,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:36:28,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109772106] [2020-08-21 15:36:28,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:36:28,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:28,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:36:28,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:36:28,344 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 3 states. [2020-08-21 15:36:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:36:29,648 INFO L93 Difference]: Finished difference Result 332 states and 431 transitions. [2020-08-21 15:36:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:36:29,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 15:36:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:36:29,665 INFO L225 Difference]: With dead ends: 332 [2020-08-21 15:36:29,665 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 15:36:29,670 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 [2020-08-21 15:36:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 15:36:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 143. [2020-08-21 15:36:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-21 15:36:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-08-21 15:36:29,767 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 46 [2020-08-21 15:36:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:36:29,767 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-08-21 15:36:29,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:36:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-08-21 15:36:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 15:36:29,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:29,771 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] [2020-08-21 15:36:29,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:36:29,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:29,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:29,772 INFO L82 PathProgramCache]: Analyzing trace with hash -395653053, now seen corresponding path program 1 times [2020-08-21 15:36:29,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:29,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441465256] [2020-08-21 15:36:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:30,105 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:30,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:30,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:30,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:30,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:30,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:30,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 15:36:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:30,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 15:36:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:36:30,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441465256] [2020-08-21 15:36:30,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:36:30,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:36:30,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291138950] [2020-08-21 15:36:30,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:36:30,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:30,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:36:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:36:30,150 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 4 states. [2020-08-21 15:36:30,520 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:36:31,476 INFO L93 Difference]: Finished difference Result 255 states and 310 transitions. [2020-08-21 15:36:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:36:31,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 15:36:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:36:31,481 INFO L225 Difference]: With dead ends: 255 [2020-08-21 15:36:31,481 INFO L226 Difference]: Without dead ends: 164 [2020-08-21 15:36:31,483 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 [2020-08-21 15:36:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-08-21 15:36:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-08-21 15:36:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 15:36:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2020-08-21 15:36:31,523 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 47 [2020-08-21 15:36:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:36:31,524 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2020-08-21 15:36:31,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:36:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2020-08-21 15:36:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 15:36:31,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:31,527 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] [2020-08-21 15:36:31,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:36:31,527 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:31,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1814461049, now seen corresponding path program 1 times [2020-08-21 15:36:31,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:31,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130082873] [2020-08-21 15:36:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:31,874 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:31,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:31,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:31,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:31,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:31,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:31,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 15:36:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:31,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 15:36:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:36:31,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130082873] [2020-08-21 15:36:31,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:36:31,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:36:31,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204511046] [2020-08-21 15:36:31,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:36:31,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:31,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:36:31,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:36:31,972 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand 5 states. [2020-08-21 15:36:32,257 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:36:32,891 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:36:34,472 INFO L93 Difference]: Finished difference Result 459 states and 568 transitions. [2020-08-21 15:36:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:36:34,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-21 15:36:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:36:34,477 INFO L225 Difference]: With dead ends: 459 [2020-08-21 15:36:34,478 INFO L226 Difference]: Without dead ends: 349 [2020-08-21 15:36:34,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:36:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-21 15:36:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 282. [2020-08-21 15:36:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-21 15:36:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 340 transitions. [2020-08-21 15:36:34,561 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 340 transitions. Word has length 52 [2020-08-21 15:36:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:36:34,562 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 340 transitions. [2020-08-21 15:36:34,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:36:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 340 transitions. [2020-08-21 15:36:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:36:34,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:34,565 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] [2020-08-21 15:36:34,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:36:34,565 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1060505325, now seen corresponding path program 1 times [2020-08-21 15:36:34,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:34,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396694798] [2020-08-21 15:36:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:34,912 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:34,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:34,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:34,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:34,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:34,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:34,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 15:36:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:34,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 15:36:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:35,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 15:36:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:36:35,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396694798] [2020-08-21 15:36:35,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:36:35,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 15:36:35,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785960392] [2020-08-21 15:36:35,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 15:36:35,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 15:36:35,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:36:35,026 INFO L87 Difference]: Start difference. First operand 282 states and 340 transitions. Second operand 12 states. [2020-08-21 15:36:35,444 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:36:35,737 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:36:35,972 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:36:36,216 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:36:36,739 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:37,484 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:36:37,848 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 15:36:38,137 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 15:36:38,427 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:36:38,782 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:36:39,244 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 15:36:39,565 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 15:36:39,821 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:36:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:36:41,956 INFO L93 Difference]: Finished difference Result 1153 states and 1576 transitions. [2020-08-21 15:36:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 15:36:41,956 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 15:36:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:36:41,965 INFO L225 Difference]: With dead ends: 1153 [2020-08-21 15:36:41,965 INFO L226 Difference]: Without dead ends: 895 [2020-08-21 15:36:41,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 15:36:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-08-21 15:36:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 794. [2020-08-21 15:36:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-21 15:36:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1006 transitions. [2020-08-21 15:36:42,154 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1006 transitions. Word has length 57 [2020-08-21 15:36:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:36:42,154 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1006 transitions. [2020-08-21 15:36:42,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 15:36:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1006 transitions. [2020-08-21 15:36:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 15:36:42,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:42,159 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] [2020-08-21 15:36:42,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:36:42,159 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:42,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1254258393, now seen corresponding path program 1 times [2020-08-21 15:36:42,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:42,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241162410] [2020-08-21 15:36:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,430 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:42,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 15:36:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 15:36:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 15:36:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 15:36:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:36:42,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241162410] [2020-08-21 15:36:42,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:36:42,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:36:42,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827754781] [2020-08-21 15:36:42,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:36:42,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:36:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:36:42,518 INFO L87 Difference]: Start difference. First operand 794 states and 1006 transitions. Second operand 6 states. [2020-08-21 15:36:42,818 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:36:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:36:44,849 INFO L93 Difference]: Finished difference Result 1951 states and 2621 transitions. [2020-08-21 15:36:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:36:44,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 15:36:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:36:44,862 INFO L225 Difference]: With dead ends: 1951 [2020-08-21 15:36:44,862 INFO L226 Difference]: Without dead ends: 1181 [2020-08-21 15:36:44,866 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 [2020-08-21 15:36:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2020-08-21 15:36:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1090. [2020-08-21 15:36:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-08-21 15:36:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1352 transitions. [2020-08-21 15:36:45,116 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1352 transitions. Word has length 61 [2020-08-21 15:36:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:36:45,117 INFO L479 AbstractCegarLoop]: Abstraction has 1090 states and 1352 transitions. [2020-08-21 15:36:45,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:36:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1352 transitions. [2020-08-21 15:36:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 15:36:45,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:45,120 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] [2020-08-21 15:36:45,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:36:45,121 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash 909865268, now seen corresponding path program 1 times [2020-08-21 15:36:45,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:45,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869116018] [2020-08-21 15:36:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,401 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:45,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 15:36:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 15:36:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 15:36:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 15:36:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 15:36:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 15:36:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 15:36:45,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869116018] [2020-08-21 15:36:45,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:36:45,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:36:45,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229901244] [2020-08-21 15:36:45,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:36:45,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:45,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:36:45,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:36:45,551 INFO L87 Difference]: Start difference. First operand 1090 states and 1352 transitions. Second operand 10 states. [2020-08-21 15:36:46,102 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 15:36:46,666 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:36:48,839 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:36:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:36:50,755 INFO L93 Difference]: Finished difference Result 2091 states and 2705 transitions. [2020-08-21 15:36:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 15:36:50,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-21 15:36:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:36:50,766 INFO L225 Difference]: With dead ends: 2091 [2020-08-21 15:36:50,766 INFO L226 Difference]: Without dead ends: 1310 [2020-08-21 15:36:50,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 15:36:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2020-08-21 15:36:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1197. [2020-08-21 15:36:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-08-21 15:36:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1463 transitions. [2020-08-21 15:36:51,046 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1463 transitions. Word has length 89 [2020-08-21 15:36:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:36:51,049 INFO L479 AbstractCegarLoop]: Abstraction has 1197 states and 1463 transitions. [2020-08-21 15:36:51,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:36:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1463 transitions. [2020-08-21 15:36:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 15:36:51,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:51,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:36:51,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:36:51,057 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash -920784732, now seen corresponding path program 1 times [2020-08-21 15:36:51,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:51,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182507553] [2020-08-21 15:36:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,371 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:51,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 15:36:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:36:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 15:36:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 15:36:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 15:36:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 15:36:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 15:36:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 15:36:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 15:36:51,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182507553] [2020-08-21 15:36:51,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:36:51,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:36:51,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641632896] [2020-08-21 15:36:51,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:36:51,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:36:51,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:36:51,636 INFO L87 Difference]: Start difference. First operand 1197 states and 1463 transitions. Second operand 10 states. [2020-08-21 15:36:52,669 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:52,918 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:36:53,206 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:53,451 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:36:54,655 INFO L93 Difference]: Finished difference Result 2526 states and 3300 transitions. [2020-08-21 15:36:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:36:54,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 143 [2020-08-21 15:36:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:36:54,664 INFO L225 Difference]: With dead ends: 2526 [2020-08-21 15:36:54,665 INFO L226 Difference]: Without dead ends: 1353 [2020-08-21 15:36:54,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:36:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2020-08-21 15:36:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1227. [2020-08-21 15:36:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-21 15:36:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1497 transitions. [2020-08-21 15:36:54,959 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1497 transitions. Word has length 143 [2020-08-21 15:36:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:36:54,961 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1497 transitions. [2020-08-21 15:36:54,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:36:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1497 transitions. [2020-08-21 15:36:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 15:36:54,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:54,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:36:54,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:36:54,970 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1804293722, now seen corresponding path program 1 times [2020-08-21 15:36:54,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:54,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776340390] [2020-08-21 15:36:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,298 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:55,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 15:36:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:36:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 15:36:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 15:36:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 15:36:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 15:36:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 15:36:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 15:36:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 15:36:55,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776340390] [2020-08-21 15:36:55,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:36:55,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 15:36:55,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082707726] [2020-08-21 15:36:55,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 15:36:55,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:55,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 15:36:55,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:36:55,552 INFO L87 Difference]: Start difference. First operand 1227 states and 1497 transitions. Second operand 12 states. [2020-08-21 15:36:56,380 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:56,618 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:56,845 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:57,551 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:57,817 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:58,080 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:36:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:36:59,087 INFO L93 Difference]: Finished difference Result 2251 states and 2835 transitions. [2020-08-21 15:36:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 15:36:59,088 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-21 15:36:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:36:59,094 INFO L225 Difference]: With dead ends: 2251 [2020-08-21 15:36:59,094 INFO L226 Difference]: Without dead ends: 1048 [2020-08-21 15:36:59,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 15:36:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-08-21 15:36:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 990. [2020-08-21 15:36:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-08-21 15:36:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1192 transitions. [2020-08-21 15:36:59,281 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1192 transitions. Word has length 143 [2020-08-21 15:36:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:36:59,281 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1192 transitions. [2020-08-21 15:36:59,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 15:36:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1192 transitions. [2020-08-21 15:36:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 15:36:59,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:36:59,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:36:59,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:36:59,287 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:36:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:36:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash -401491891, now seen corresponding path program 1 times [2020-08-21 15:36:59,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:36:59,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724402515] [2020-08-21 15:36:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:36:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,597 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:36:59,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:36:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:36:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:36:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:36:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 15:36:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 15:36:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:36:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:36:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 15:36:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-21 15:36:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-21 15:36:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:36:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:36:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 15:36:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-21 15:36:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-21 15:36:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:36:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-21 15:36:59,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724402515] [2020-08-21 15:36:59,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:36:59,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 15:36:59,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470683856] [2020-08-21 15:36:59,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 15:36:59,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:36:59,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 15:36:59,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:36:59,997 INFO L87 Difference]: Start difference. First operand 990 states and 1192 transitions. Second operand 15 states. [2020-08-21 15:37:00,660 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:37:01,506 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:37:03,043 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:03,384 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:03,637 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:03,869 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:37:04,148 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:37:04,386 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:37:04,876 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-21 15:37:05,354 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-21 15:37:06,173 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:06,424 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:06,699 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:37:06,950 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:37:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:37:07,850 INFO L93 Difference]: Finished difference Result 2788 states and 3494 transitions. [2020-08-21 15:37:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 15:37:07,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2020-08-21 15:37:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:37:07,862 INFO L225 Difference]: With dead ends: 2788 [2020-08-21 15:37:07,863 INFO L226 Difference]: Without dead ends: 1822 [2020-08-21 15:37:07,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 15:37:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2020-08-21 15:37:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1717. [2020-08-21 15:37:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2020-08-21 15:37:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2029 transitions. [2020-08-21 15:37:08,219 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2029 transitions. Word has length 147 [2020-08-21 15:37:08,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:37:08,221 INFO L479 AbstractCegarLoop]: Abstraction has 1717 states and 2029 transitions. [2020-08-21 15:37:08,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 15:37:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2029 transitions. [2020-08-21 15:37:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 15:37:08,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:37:08,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:37:08,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:37:08,227 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:37:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:37:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash 628739049, now seen corresponding path program 1 times [2020-08-21 15:37:08,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:37:08,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197067874] [2020-08-21 15:37:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:37:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,532 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:37:08,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:37:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:37:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:37:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:37:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:37:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 15:37:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 15:37:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:37:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:37:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 15:37:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 15:37:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 15:37:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-21 15:37:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 15:37:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 15:37:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-21 15:37:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 15:37:08,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197067874] [2020-08-21 15:37:08,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:37:08,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 15:37:08,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758398767] [2020-08-21 15:37:08,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:37:08,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:37:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:37:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:37:08,724 INFO L87 Difference]: Start difference. First operand 1717 states and 2029 transitions. Second operand 11 states. [2020-08-21 15:37:09,101 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:37:11,247 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:11,501 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:37:11,761 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:12,009 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:12,246 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 15:37:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:37:12,846 INFO L93 Difference]: Finished difference Result 2048 states and 2598 transitions. [2020-08-21 15:37:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 15:37:12,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-08-21 15:37:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:37:12,860 INFO L225 Difference]: With dead ends: 2048 [2020-08-21 15:37:12,861 INFO L226 Difference]: Without dead ends: 2045 [2020-08-21 15:37:12,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-21 15:37:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-08-21 15:37:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1717. [2020-08-21 15:37:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2020-08-21 15:37:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2019 transitions. [2020-08-21 15:37:13,295 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2019 transitions. Word has length 151 [2020-08-21 15:37:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:37:13,296 INFO L479 AbstractCegarLoop]: Abstraction has 1717 states and 2019 transitions. [2020-08-21 15:37:13,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:37:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2019 transitions. [2020-08-21 15:37:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 15:37:13,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:37:13,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:37:13,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:37:13,302 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:37:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:37:13,302 INFO L82 PathProgramCache]: Analyzing trace with hash -220870584, now seen corresponding path program 1 times [2020-08-21 15:37:13,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:37:13,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895455997] [2020-08-21 15:37:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:37:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,598 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 15:37:13,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:37:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:37:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:37:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:37:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 15:37:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 15:37:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 15:37:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:37:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 15:37:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 15:37:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-21 15:37:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-21 15:37:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:37:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 15:37:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:37:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 15:37:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-21 15:37:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:37:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 15:37:13,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895455997] [2020-08-21 15:37:13,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:37:13,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 15:37:13,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788885257] [2020-08-21 15:37:13,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 15:37:13,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:37:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 15:37:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:37:13,830 INFO L87 Difference]: Start difference. First operand 1717 states and 2019 transitions. Second operand 12 states. [2020-08-21 15:37:14,296 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:37:14,880 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:37:15,445 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:15,734 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:15,983 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:16,286 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 15:37:16,562 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:37:16,801 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 15:37:18,684 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 15:37:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:37:19,483 INFO L93 Difference]: Finished difference Result 4124 states and 5229 transitions. [2020-08-21 15:37:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 15:37:19,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-08-21 15:37:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:37:19,499 INFO L225 Difference]: With dead ends: 4124 [2020-08-21 15:37:19,499 INFO L226 Difference]: Without dead ends: 2749 [2020-08-21 15:37:19,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-08-21 15:37:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2020-08-21 15:37:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2293. [2020-08-21 15:37:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2293 states. [2020-08-21 15:37:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 2743 transitions. [2020-08-21 15:37:19,863 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 2743 transitions. Word has length 151 [2020-08-21 15:37:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:37:19,864 INFO L479 AbstractCegarLoop]: Abstraction has 2293 states and 2743 transitions. [2020-08-21 15:37:19,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 15:37:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 2743 transitions. [2020-08-21 15:37:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-08-21 15:37:19,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:37:19,873 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:37:19,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:37:19,873 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:37:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:37:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 402231489, now seen corresponding path program 2 times [2020-08-21 15:37:19,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:37:19,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134523228] [2020-08-21 15:37:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:37:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:37:19,939 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:37:19,939 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:37:19,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:37:19,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:37:19 BoogieIcfgContainer [2020-08-21 15:37:19,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:37:19,982 INFO L168 Benchmark]: Toolchain (without parser) took 54568.80 ms. Allocated memory was 139.5 MB in the beginning and 926.4 MB in the end (delta: 787.0 MB). Free memory was 101.3 MB in the beginning and 318.9 MB in the end (delta: -217.5 MB). Peak memory consumption was 569.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:37:19,982 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-21 15:37:19,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.37 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.3 MB in the beginning and 169.8 MB in the end (delta: -68.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:37:19,983 INFO L168 Benchmark]: Boogie Preprocessor took 109.68 ms. Allocated memory is still 202.9 MB. Free memory was 169.8 MB in the beginning and 165.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-21 15:37:19,984 INFO L168 Benchmark]: RCFGBuilder took 1118.86 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 165.9 MB in the beginning and 194.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:37:19,985 INFO L168 Benchmark]: TraceAbstraction took 52669.06 ms. Allocated memory was 235.4 MB in the beginning and 926.4 MB in the end (delta: 691.0 MB). Free memory was 194.0 MB in the beginning and 318.9 MB in the end (delta: -124.9 MB). Peak memory consumption was 566.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:37:19,987 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 666.37 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.3 MB in the beginning and 169.8 MB in the end (delta: -68.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.68 ms. Allocated memory is still 202.9 MB. Free memory was 169.8 MB in the beginning and 165.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1118.86 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 165.9 MB in the beginning and 194.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 52669.06 ms. Allocated memory was 235.4 MB in the beginning and 926.4 MB in the end (delta: 691.0 MB). Free memory was 194.0 MB in the beginning and 318.9 MB in the end (delta: -124.9 MB). Peak memory consumption was 566.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 439]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L238] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L444] int cleanupTimeShifts = 4; [L556] int pumpRunning = 0; [L557] int systemActive = 1; [L774] int waterLevel = 1; [L775] int methaneLevelCritical = 0; [L525] int retValue_acc ; [L526] int tmp ; [L530] FCALL select_helpers() [L531] FCALL select_features() [L532] CALL, EXPR valid_product() [L963] int retValue_acc ; [L966] retValue_acc = 1 [L967] return (retValue_acc); [L532] RET, EXPR valid_product() [L532] tmp = valid_product() [L534] COND TRUE \read(tmp) [L536] FCALL setup() [L537] CALL runTest() [L516] CALL test() [L869] int splverifierCounter ; [L870] int tmp ; [L871] int tmp___0 ; [L872] int tmp___1 ; [L873] int tmp___2 ; [L876] splverifierCounter = 0 [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND TRUE \read(tmp) [L890] CALL waterRise() [L792] COND TRUE waterLevel < 2 [L793] waterLevel = waterLevel + 1 [L890] RET waterRise() [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND FALSE !(\read(pumpRunning)) [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND FALSE !(\read(pumpRunning)) [L636] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND TRUE ! pumpRunning [L597] CALL, EXPR isHighWaterLevel() [L732] int retValue_acc ; [L733] int tmp ; [L734] int tmp___0 ; [L738] CALL, EXPR isHighWaterSensorDry() [L854] int retValue_acc ; [L857] COND FALSE !(waterLevel < 2) [L861] retValue_acc = 0 [L862] return (retValue_acc); [L738] RET, EXPR isHighWaterSensorDry() [L738] tmp = isHighWaterSensorDry() [L740] COND FALSE !(\read(tmp)) [L743] tmp___0 = 1 [L745] retValue_acc = tmp___0 [L746] return (retValue_acc); [L597] RET, EXPR isHighWaterLevel() [L597] tmp = isHighWaterLevel() [L599] COND TRUE \read(tmp) [L601] CALL activatePump() [L651] int tmp ; [L655] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L655] RET, EXPR isMethaneAlarm() [L655] tmp = isMethaneAlarm() [L657] COND FALSE !(\read(tmp)) [L661] CALL activatePump__wrappee__highWaterSensor() [L646] pumpRunning = 1 [L661] RET activatePump__wrappee__highWaterSensor() [L601] RET activatePump() [L636] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L578] RET __utac_acc__Specification4_spec__1() [L925] RET timeShift() [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND FALSE !(\read(tmp)) [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND TRUE \read(pumpRunning) [L565] CALL lowerWaterLevel() [L780] COND TRUE waterLevel > 0 [L781] waterLevel = waterLevel - 1 [L565] RET lowerWaterLevel() [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND TRUE \read(pumpRunning) [L623] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L623] RET, EXPR isMethaneAlarm() [L623] tmp = isMethaneAlarm() [L625] COND FALSE !(\read(tmp)) [L631] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND FALSE !(! pumpRunning) [L610] FCALL processEnvironment__wrappee__base() [L631] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L578] RET __utac_acc__Specification4_spec__1() [L925] RET timeShift() [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND FALSE !(\read(tmp)) [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND TRUE \read(pumpRunning) [L565] CALL lowerWaterLevel() [L780] COND TRUE waterLevel > 0 [L781] waterLevel = waterLevel - 1 [L565] RET lowerWaterLevel() [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND TRUE \read(pumpRunning) [L623] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L623] RET, EXPR isMethaneAlarm() [L623] tmp = isMethaneAlarm() [L625] COND FALSE !(\read(tmp)) [L631] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND FALSE !(! pumpRunning) [L610] FCALL processEnvironment__wrappee__base() [L631] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND TRUE tmp == 0 [L53] CALL, EXPR isPumpRunning() [L687] int retValue_acc ; [L690] retValue_acc = pumpRunning [L691] return (retValue_acc); [L53] RET, EXPR isPumpRunning() [L53] tmp___0 = isPumpRunning() [L55] COND TRUE \read(tmp___0) [L57] CALL __automaton_fail() [L439] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 242 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 52.5s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 43.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1589 SDtfs, 4238 SDslu, 1798 SDs, 0 SdLazy, 11178 SolverSat, 3068 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 388 SyntacticMatches, 6 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 17.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2293occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 1512 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 1290 NumberOfCodeBlocks, 1290 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1076 ConstructedInterpolants, 0 QuantifiedInterpolants, 403327 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 172/193 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...