/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:51:12,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:51:12,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:51:12,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:51:12,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:51:12,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:51:12,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:51:12,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:51:12,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:51:12,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:51:12,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:51:12,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:51:12,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:51:12,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:51:12,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:51:12,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:51:12,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:51:12,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:51:12,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:51:12,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:51:12,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:51:12,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:51:12,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:51:12,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:51:12,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:51:12,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:51:12,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:51:12,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:51:12,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:51:12,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:51:12,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:51:12,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:51:12,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:51:12,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:51:12,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:51:12,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:51:12,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:51:12,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:51:12,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:51:12,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:51:12,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:51:12,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:51:12,878 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:51:12,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:51:12,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:51:12,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:51:12,880 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:51:12,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:51:12,881 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:51:12,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:51:12,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:51:12,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:51:12,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:51:12,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:51:12,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:51:12,883 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:51:12,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:51:12,883 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:51:12,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:51:12,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:51:12,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:51:12,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:51:12,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:51:12,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:51:12,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:51:12,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:51:12,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:51:12,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:51:12,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:51:12,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:51:12,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:51:12,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 16:51:13,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:51:13,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:51:13,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:51:13,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:51:13,233 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:51:13,234 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-18 16:51:13,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34ee5451e/265ebea545004eaf925d275b0d3fb5ab/FLAG0417502c9 [2020-08-18 16:51:13,892 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:51:13,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-18 16:51:13,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34ee5451e/265ebea545004eaf925d275b0d3fb5ab/FLAG0417502c9 [2020-08-18 16:51:14,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34ee5451e/265ebea545004eaf925d275b0d3fb5ab [2020-08-18 16:51:14,236 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:51:14,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:51:14,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:51:14,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:51:14,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:51:14,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:14,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461dafa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14, skipping insertion in model container [2020-08-18 16:51:14,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:14,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:51:14,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:51:14,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:51:14,821 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:51:14,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:51:14,940 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:51:14,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14 WrapperNode [2020-08-18 16:51:14,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:51:14,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:51:14,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:51:14,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:51:14,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:14,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:14,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:14,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:15,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:15,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:15,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (1/1) ... [2020-08-18 16:51:15,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:51:15,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:51:15,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:51:15,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:51:15,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:51:15,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:51:15,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:51:15,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 16:51:15,114 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 16:51:15,114 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 16:51:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 16:51:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 16:51:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 16:51:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 16:51:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 16:51:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 16:51:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 16:51:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 16:51:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 16:51:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 16:51:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 16:51:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 16:51:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 16:51:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 16:51:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 16:51:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 16:51:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 16:51:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 16:51:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 16:51:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 16:51:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 16:51:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 16:51:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 16:51:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 16:51:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 16:51:15,120 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 16:51:15,120 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 16:51:15,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:51:15,120 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 16:51:15,120 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 16:51:15,121 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 16:51:15,121 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 16:51:15,121 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 16:51:15,121 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 16:51:15,121 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 16:51:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 16:51:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:51:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:51:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 16:51:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 16:51:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 16:51:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 16:51:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 16:51:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 16:51:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 16:51:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 16:51:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 16:51:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 16:51:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 16:51:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 16:51:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 16:51:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 16:51:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 16:51:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 16:51:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 16:51:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 16:51:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 16:51:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 16:51:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 16:51:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 16:51:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 16:51:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:51:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 16:51:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:51:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:51:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 16:51:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:51:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:51:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:51:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:51:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 16:51:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:51:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 16:51:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 16:51:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:51:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 16:51:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 16:51:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 16:51:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 16:51:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 16:51:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 16:51:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 16:51:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 16:51:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 16:51:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 16:51:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 16:51:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:51:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 16:51:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:51:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 16:51:15,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:51:16,279 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:51:16,280 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 16:51:16,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:51:16 BoogieIcfgContainer [2020-08-18 16:51:16,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:51:16,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:51:16,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:51:16,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:51:16,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:51:14" (1/3) ... [2020-08-18 16:51:16,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63276a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:51:16, skipping insertion in model container [2020-08-18 16:51:16,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:51:14" (2/3) ... [2020-08-18 16:51:16,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63276a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:51:16, skipping insertion in model container [2020-08-18 16:51:16,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:51:16" (3/3) ... [2020-08-18 16:51:16,294 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product51.cil.c [2020-08-18 16:51:16,305 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:51:16,313 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:51:16,327 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:51:16,353 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:51:16,353 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:51:16,353 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:51:16,353 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:51:16,354 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:51:16,354 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:51:16,354 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:51:16,354 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:51:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-08-18 16:51:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 16:51:16,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:16,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:51:16,390 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:16,396 INFO L82 PathProgramCache]: Analyzing trace with hash -199381509, now seen corresponding path program 1 times [2020-08-18 16:51:16,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:16,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488667866] [2020-08-18 16:51:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:17,073 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:51:17,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:51:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:17,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:51:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:17,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:51:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:17,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:51:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:17,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:51:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:17,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 16:51:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:17,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 16:51:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:51:17,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488667866] [2020-08-18 16:51:17,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:51:17,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:51:17,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432229719] [2020-08-18 16:51:17,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:51:17,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:51:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:51:17,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:51:17,199 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-08-18 16:51:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:51:18,304 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-08-18 16:51:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:51:18,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 16:51:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:51:18,322 INFO L225 Difference]: With dead ends: 311 [2020-08-18 16:51:18,322 INFO L226 Difference]: Without dead ends: 168 [2020-08-18 16:51:18,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:51:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-18 16:51:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-08-18 16:51:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 16:51:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-08-18 16:51:18,420 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-08-18 16:51:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:51:18,420 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-08-18 16:51:18,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:51:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-08-18 16:51:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 16:51:18,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:18,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:51:18,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:51:18,424 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:18,425 INFO L82 PathProgramCache]: Analyzing trace with hash 822116352, now seen corresponding path program 1 times [2020-08-18 16:51:18,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:18,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098027664] [2020-08-18 16:51:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:18,777 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:51:18,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:51:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:18,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:51:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:18,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:51:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:18,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:51:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:18,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:51:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:18,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 16:51:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:18,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:51:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:51:18,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098027664] [2020-08-18 16:51:18,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:51:18,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:51:18,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623465079] [2020-08-18 16:51:18,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:51:18,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:51:18,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:51:18,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:51:18,834 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-08-18 16:51:19,274 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:51:20,155 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-18 16:51:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:51:20,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 16:51:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:51:20,158 INFO L225 Difference]: With dead ends: 238 [2020-08-18 16:51:20,159 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 16:51:20,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:51:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 16:51:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-08-18 16:51:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 16:51:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-08-18 16:51:20,204 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-08-18 16:51:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:51:20,204 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-08-18 16:51:20,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:51:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-08-18 16:51:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 16:51:20,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:20,207 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] [2020-08-18 16:51:20,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:51:20,207 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:20,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1772796698, now seen corresponding path program 1 times [2020-08-18 16:51:20,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:20,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080361309] [2020-08-18 16:51:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:20,498 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:51:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:51:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:20,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:51:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:20,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:51:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:20,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:51:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:20,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:51:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:20,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 16:51:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:20,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 16:51:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:51:20,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080361309] [2020-08-18 16:51:20,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:51:20,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 16:51:20,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32312105] [2020-08-18 16:51:20,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:51:20,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:51:20,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:51:20,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:51:20,595 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-08-18 16:51:20,952 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:51:21,293 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:21,543 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:21,770 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:22,496 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:51:24,242 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-08-18 16:51:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:51:24,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 16:51:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:51:24,249 INFO L225 Difference]: With dead ends: 427 [2020-08-18 16:51:24,249 INFO L226 Difference]: Without dead ends: 326 [2020-08-18 16:51:24,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 16:51:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-18 16:51:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-08-18 16:51:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-18 16:51:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-08-18 16:51:24,326 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-08-18 16:51:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:51:24,327 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-08-18 16:51:24,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:51:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-08-18 16:51:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 16:51:24,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:24,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:51:24,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:51:24,331 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:24,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1539786498, now seen corresponding path program 1 times [2020-08-18 16:51:24,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:24,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552903213] [2020-08-18 16:51:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,592 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:51:24,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:51:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:51:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:51:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:51:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:51:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 16:51:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 16:51:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 16:51:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:51:24,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552903213] [2020-08-18 16:51:24,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:51:24,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 16:51:24,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729872503] [2020-08-18 16:51:24,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:51:24,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:51:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:51:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:51:24,716 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 8 states. [2020-08-18 16:51:25,079 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:51:26,120 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:26,466 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:26,769 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:27,045 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:51:27,475 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:51:28,342 INFO L93 Difference]: Finished difference Result 862 states and 1117 transitions. [2020-08-18 16:51:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:51:28,344 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 16:51:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:51:28,350 INFO L225 Difference]: With dead ends: 862 [2020-08-18 16:51:28,350 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 16:51:28,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:51:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 16:51:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 491. [2020-08-18 16:51:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-08-18 16:51:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 598 transitions. [2020-08-18 16:51:28,477 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 598 transitions. Word has length 57 [2020-08-18 16:51:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:51:28,478 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 598 transitions. [2020-08-18 16:51:28,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:51:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 598 transitions. [2020-08-18 16:51:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 16:51:28,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:28,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:51:28,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:51:28,482 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:28,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1493126654, now seen corresponding path program 1 times [2020-08-18 16:51:28,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:28,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532373590] [2020-08-18 16:51:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,773 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:51:28,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:51:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:51:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:51:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:51:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:51:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:51:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 16:51:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 16:51:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 16:51:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:51:28,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532373590] [2020-08-18 16:51:28,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:51:28,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 16:51:28,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44035592] [2020-08-18 16:51:28,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:51:28,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:51:28,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:51:28,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:51:28,896 INFO L87 Difference]: Start difference. First operand 491 states and 598 transitions. Second operand 9 states. [2020-08-18 16:51:29,242 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:51:30,176 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:30,438 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:30,694 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:31,203 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:51:31,506 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:51:32,300 INFO L93 Difference]: Finished difference Result 1371 states and 1840 transitions. [2020-08-18 16:51:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 16:51:32,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 16:51:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:51:32,308 INFO L225 Difference]: With dead ends: 1371 [2020-08-18 16:51:32,308 INFO L226 Difference]: Without dead ends: 904 [2020-08-18 16:51:32,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 16:51:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-08-18 16:51:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 723. [2020-08-18 16:51:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-08-18 16:51:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 891 transitions. [2020-08-18 16:51:32,467 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 891 transitions. Word has length 61 [2020-08-18 16:51:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:51:32,467 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 891 transitions. [2020-08-18 16:51:32,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:51:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 891 transitions. [2020-08-18 16:51:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 16:51:32,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:32,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:51:32,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:51:32,471 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash 807556796, now seen corresponding path program 1 times [2020-08-18 16:51:32,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:32,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331066175] [2020-08-18 16:51:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,754 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:51:32,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:51:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:51:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:51:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:51:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:51:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:51:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:51:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:51:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:51:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:51:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:51:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 16:51:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:51:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:51:32,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331066175] [2020-08-18 16:51:32,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:51:32,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 16:51:32,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039525925] [2020-08-18 16:51:32,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 16:51:32,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:51:32,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 16:51:32,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 16:51:32,920 INFO L87 Difference]: Start difference. First operand 723 states and 891 transitions. Second operand 9 states. [2020-08-18 16:51:33,995 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:34,244 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 16:51:34,511 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:34,774 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:51:35,792 INFO L93 Difference]: Finished difference Result 1679 states and 2233 transitions. [2020-08-18 16:51:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:51:35,792 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-18 16:51:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:51:35,800 INFO L225 Difference]: With dead ends: 1679 [2020-08-18 16:51:35,800 INFO L226 Difference]: Without dead ends: 980 [2020-08-18 16:51:35,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 16:51:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-08-18 16:51:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 749. [2020-08-18 16:51:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-08-18 16:51:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 919 transitions. [2020-08-18 16:51:35,988 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 919 transitions. Word has length 83 [2020-08-18 16:51:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:51:35,989 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 919 transitions. [2020-08-18 16:51:35,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 16:51:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 919 transitions. [2020-08-18 16:51:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 16:51:35,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:35,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:51:35,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:51:35,992 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:35,992 INFO L82 PathProgramCache]: Analyzing trace with hash 830189050, now seen corresponding path program 1 times [2020-08-18 16:51:35,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:35,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078460082] [2020-08-18 16:51:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,328 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:51:36,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:51:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:51:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:51:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:51:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:51:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:51:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:51:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:51:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:51:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:51:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:51:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 16:51:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:51:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:51:36,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078460082] [2020-08-18 16:51:36,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:51:36,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 16:51:36,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790651524] [2020-08-18 16:51:36,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:51:36,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:51:36,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:51:36,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:51:36,454 INFO L87 Difference]: Start difference. First operand 749 states and 919 transitions. Second operand 11 states. [2020-08-18 16:51:37,213 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 16:51:37,462 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:37,694 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:38,385 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:38,674 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:38,908 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 16:51:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:51:40,062 INFO L93 Difference]: Finished difference Result 1733 states and 2344 transitions. [2020-08-18 16:51:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:51:40,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-18 16:51:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:51:40,069 INFO L225 Difference]: With dead ends: 1733 [2020-08-18 16:51:40,070 INFO L226 Difference]: Without dead ends: 1008 [2020-08-18 16:51:40,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 16:51:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-08-18 16:51:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 765. [2020-08-18 16:51:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-18 16:51:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-18 16:51:40,290 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 83 [2020-08-18 16:51:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:51:40,291 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-18 16:51:40,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:51:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-18 16:51:40,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 16:51:40,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:40,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:51:40,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:51:40,295 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:40,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:40,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1855681049, now seen corresponding path program 1 times [2020-08-18 16:51:40,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:40,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024927477] [2020-08-18 16:51:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,578 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 16:51:40,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:51:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:51:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:51:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 16:51:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 16:51:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 16:51:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:51:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:51:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:51:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 16:51:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 16:51:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 16:51:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 16:51:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:51:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:51:40,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024927477] [2020-08-18 16:51:40,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:51:40,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 16:51:40,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712529307] [2020-08-18 16:51:40,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:51:40,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:51:40,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:51:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:51:40,718 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 7 states. [2020-08-18 16:51:41,200 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:51:41,784 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 16:51:44,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:51:44,203 INFO L93 Difference]: Finished difference Result 2622 states and 3569 transitions. [2020-08-18 16:51:44,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 16:51:44,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-08-18 16:51:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:51:44,217 INFO L225 Difference]: With dead ends: 2622 [2020-08-18 16:51:44,217 INFO L226 Difference]: Without dead ends: 1881 [2020-08-18 16:51:44,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:51:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-08-18 16:51:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1579. [2020-08-18 16:51:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-08-18 16:51:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1949 transitions. [2020-08-18 16:51:44,579 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1949 transitions. Word has length 83 [2020-08-18 16:51:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:51:44,580 INFO L479 AbstractCegarLoop]: Abstraction has 1579 states and 1949 transitions. [2020-08-18 16:51:44,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:51:44,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1949 transitions. [2020-08-18 16:51:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 16:51:44,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:51:44,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:51:44,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:51:44,584 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:51:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:51:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1308897473, now seen corresponding path program 1 times [2020-08-18 16:51:44,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:51:44,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680156133] [2020-08-18 16:51:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:51:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:51:44,657 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:51:44,657 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:51:44,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:51:44,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:51:44 BoogieIcfgContainer [2020-08-18 16:51:44,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:51:44,705 INFO L168 Benchmark]: Toolchain (without parser) took 30467.92 ms. Allocated memory was 141.6 MB in the beginning and 663.2 MB in the end (delta: 521.7 MB). Free memory was 103.6 MB in the beginning and 492.8 MB in the end (delta: -389.2 MB). Peak memory consumption was 132.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:51:44,706 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:51:44,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 704.50 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 103.4 MB in the beginning and 169.0 MB in the end (delta: -65.6 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:51:44,714 INFO L168 Benchmark]: Boogie Preprocessor took 92.96 ms. Allocated memory is still 202.9 MB. Free memory was 169.0 MB in the beginning and 164.6 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:51:44,719 INFO L168 Benchmark]: RCFGBuilder took 1249.06 ms. Allocated memory was 202.9 MB in the beginning and 233.3 MB in the end (delta: 30.4 MB). Free memory was 164.6 MB in the beginning and 185.3 MB in the end (delta: -20.7 MB). Peak memory consumption was 77.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:51:44,721 INFO L168 Benchmark]: TraceAbstraction took 28416.71 ms. Allocated memory was 233.3 MB in the beginning and 663.2 MB in the end (delta: 429.9 MB). Free memory was 185.3 MB in the beginning and 492.8 MB in the end (delta: -307.5 MB). Peak memory consumption was 122.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:51:44,733 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 704.50 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 103.4 MB in the beginning and 169.0 MB in the end (delta: -65.6 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 92.96 ms. Allocated memory is still 202.9 MB. Free memory was 169.0 MB in the beginning and 164.6 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1249.06 ms. Allocated memory was 202.9 MB in the beginning and 233.3 MB in the end (delta: 30.4 MB). Free memory was 164.6 MB in the beginning and 185.3 MB in the end (delta: -20.7 MB). Peak memory consumption was 77.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28416.71 ms. Allocated memory was 233.3 MB in the beginning and 663.2 MB in the end (delta: 429.9 MB). Free memory was 185.3 MB in the beginning and 492.8 MB in the end (delta: -307.5 MB). Peak memory consumption was 122.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 704]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L121] int pumpRunning = 0; [L122] int systemActive = 1; [L503] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L773] int cleanupTimeShifts = 4; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; [L846] int retValue_acc ; [L847] int tmp ; [L851] FCALL select_helpers() [L852] FCALL select_features() [L853] CALL, EXPR valid_product() [L738] int retValue_acc ; [L741] retValue_acc = 1 [L742] return (retValue_acc); [L853] RET, EXPR valid_product() [L853] tmp = valid_product() [L855] COND TRUE \read(tmp) [L857] FCALL setup() [L858] CALL runTest() [L840] CALL test() [L46] int splverifierCounter ; [L47] int tmp ; [L48] int tmp___0 ; [L49] int tmp___1 ; [L50] int tmp___2 ; [L53] splverifierCounter = 0 [L55] COND TRUE 1 [L57] COND TRUE splverifierCounter < 4 [L63] tmp = __VERIFIER_nondet_int() [L65] COND TRUE \read(tmp) [L67] CALL waterRise() [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 [L67] RET waterRise() [L73] tmp___0 = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp___0) [L77] CALL changeMethaneLevel() [L900] COND FALSE !(\read(methaneLevelCritical)) [L903] methaneLevelCritical = 1 [L77] RET changeMethaneLevel() [L83] tmp___2 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___2) [L100] CALL timeShift() [L129] COND FALSE !(\read(pumpRunning)) [L136] COND TRUE \read(systemActive) [L138] CALL processEnvironment() [L184] int tmp ; [L187] COND FALSE !(\read(pumpRunning)) [L202] CALL processEnvironment__wrappee__highWaterSensor() [L158] int tmp ; [L161] COND TRUE ! pumpRunning [L163] CALL, EXPR isHighWaterLevel() [L281] int retValue_acc ; [L282] int tmp ; [L283] int tmp___0 ; [L287] CALL, EXPR isHighWaterSensorDry() [L950] int retValue_acc ; [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); [L287] RET, EXPR isHighWaterSensorDry() [L287] tmp = isHighWaterSensorDry() [L289] COND FALSE !(\read(tmp)) [L292] tmp___0 = 1 [L294] retValue_acc = tmp___0 [L295] return (retValue_acc); [L163] RET, EXPR isHighWaterLevel() [L163] tmp = isHighWaterLevel() [L165] COND TRUE \read(tmp) [L167] CALL activatePump() [L212] pumpRunning = 1 [L167] RET activatePump() [L202] RET processEnvironment__wrappee__highWaterSensor() [L138] RET processEnvironment() [L144] CALL __utac_acc__Specification1_spec__1() [L748] int tmp ; [L749] int tmp___0 ; [L753] CALL, EXPR isMethaneLevelCritical() [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); [L753] RET, EXPR isMethaneLevelCritical() [L753] tmp = isMethaneLevelCritical() [L755] COND TRUE \read(tmp) [L757] CALL, EXPR isPumpRunning() [L236] int retValue_acc ; [L239] retValue_acc = pumpRunning [L240] return (retValue_acc); [L757] RET, EXPR isPumpRunning() [L757] tmp___0 = isPumpRunning() [L759] COND TRUE \read(tmp___0) [L761] CALL __automaton_fail() [L704] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 241 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.3s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 23.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 988 SDtfs, 1945 SDslu, 1033 SDs, 0 SdLazy, 5149 SolverSat, 1211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 1203 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 150744 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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...