/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:39:39,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:39:39,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:39:39,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:39:39,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:39:39,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:39:39,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:39:39,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:39:39,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:39:39,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:39:39,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:39:39,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:39:39,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:39:39,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:39:39,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:39:39,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:39:39,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:39:39,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:39:39,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:39:39,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:39:39,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:39:39,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:39:39,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:39:39,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:39:39,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:39:39,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:39:39,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:39:39,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:39:39,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:39:39,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:39:39,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:39:39,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:39:39,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:39:39,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:39:39,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:39:39,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:39:39,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:39:39,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:39:39,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:39:39,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:39:39,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:39:39,178 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 17:39:39,215 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:39:39,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:39:39,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:39:39,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:39:39,217 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:39:39,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:39:39,218 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:39:39,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:39:39,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:39:39,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:39:39,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:39:39,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:39:39,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:39:39,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:39:39,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:39:39,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:39:39,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:39:39,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:39:39,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:39:39,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:39:39,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:39:39,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:39:39,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:39:39,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:39:39,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:39:39,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:39:39,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:39:39,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:39:39,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:39:39,223 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:39:39,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:39:39,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:39:39,535 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:39:39,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:39:39,537 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:39:39,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c [2020-08-18 17:39:39,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bca71804b/5272f2602d414680b3c3b11388bfe0c4/FLAGbaf3620bc [2020-08-18 17:39:40,180 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:39:40,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c [2020-08-18 17:39:40,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bca71804b/5272f2602d414680b3c3b11388bfe0c4/FLAGbaf3620bc [2020-08-18 17:39:40,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bca71804b/5272f2602d414680b3c3b11388bfe0c4 [2020-08-18 17:39:40,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:39:40,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:39:40,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:39:40,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:39:40,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:39:40,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:39:40" (1/1) ... [2020-08-18 17:39:40,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:40, skipping insertion in model container [2020-08-18 17:39:40,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:39:40" (1/1) ... [2020-08-18 17:39:40,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:39:40,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:39:40,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:39:40,940 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:39:41,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:39:41,153 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:39:41,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41 WrapperNode [2020-08-18 17:39:41,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:39:41,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:39:41,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:39:41,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:39:41,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (1/1) ... [2020-08-18 17:39:41,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (1/1) ... [2020-08-18 17:39:41,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (1/1) ... [2020-08-18 17:39:41,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (1/1) ... [2020-08-18 17:39:41,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (1/1) ... [2020-08-18 17:39:41,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (1/1) ... [2020-08-18 17:39:41,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (1/1) ... [2020-08-18 17:39:41,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:39:41,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:39:41,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:39:41,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:39:41,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (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 17:39:41,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:39:41,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:39:41,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 17:39:41,341 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 17:39:41,342 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 17:39:41,342 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 17:39:41,342 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 17:39:41,343 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 17:39:41,343 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 17:39:41,343 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 17:39:41,344 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 17:39:41,344 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 17:39:41,344 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 17:39:41,344 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 17:39:41,345 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 17:39:41,345 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 17:39:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 17:39:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 17:39:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 17:39:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 17:39:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 17:39:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 17:39:41,347 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 17:39:41,347 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 17:39:41,347 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 17:39:41,348 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 17:39:41,348 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 17:39:41,348 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 17:39:41,349 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 17:39:41,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 17:39:41,349 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 17:39:41,349 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 17:39:41,349 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 17:39:41,350 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 17:39:41,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:39:41,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 17:39:41,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 17:39:41,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 17:39:41,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 17:39:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 17:39:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 17:39:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 17:39:41,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:39:41,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:39:41,352 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 17:39:41,352 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 17:39:41,353 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 17:39:41,353 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 17:39:41,354 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 17:39:41,354 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 17:39:41,354 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 17:39:41,354 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 17:39:41,354 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 17:39:41,354 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 17:39:41,354 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 17:39:41,355 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 17:39:41,355 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 17:39:41,356 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 17:39:41,356 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 17:39:41,356 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 17:39:41,356 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 17:39:41,356 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 17:39:41,356 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 17:39:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 17:39:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 17:39:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 17:39:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 17:39:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 17:39:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 17:39:41,357 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 17:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 17:39:41,358 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 17:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:39:41,359 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 17:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 17:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 17:39:41,360 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 17:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 17:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 17:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:39:41,361 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 17:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 17:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:39:41,362 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 17:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 17:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 17:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 17:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 17:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 17:39:41,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:39:41,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 17:39:41,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:39:42,550 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:39:42,550 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 17:39:42,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:39:42 BoogieIcfgContainer [2020-08-18 17:39:42,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:39:42,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:39:42,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:39:42,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:39:42,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:39:40" (1/3) ... [2020-08-18 17:39:42,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d1b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:39:42, skipping insertion in model container [2020-08-18 17:39:42,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:39:41" (2/3) ... [2020-08-18 17:39:42,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d1b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:39:42, skipping insertion in model container [2020-08-18 17:39:42,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:39:42" (3/3) ... [2020-08-18 17:39:42,566 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product55.cil.c [2020-08-18 17:39:42,577 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:39:42,586 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:39:42,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:39:42,628 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:39:42,629 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:39:42,629 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:39:42,629 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:39:42,629 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:39:42,630 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:39:42,630 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:39:42,630 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:39:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states. [2020-08-18 17:39:42,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 17:39:42,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:39:42,667 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 17:39:42,667 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:39:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:39:42,674 INFO L82 PathProgramCache]: Analyzing trace with hash 616057763, now seen corresponding path program 1 times [2020-08-18 17:39:42,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:39:42,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115248272] [2020-08-18 17:39:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:39:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:43,281 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:39:43,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:39:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:43,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:39:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:43,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:39:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:43,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:39:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:43,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:39:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:43,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 17:39:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:43,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 17:39:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:43,401 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 17:39:43,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115248272] [2020-08-18 17:39:43,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:39:43,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:39:43,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077608910] [2020-08-18 17:39:43,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:39:43,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:39:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:39:43,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:39:43,430 INFO L87 Difference]: Start difference. First operand 192 states. Second operand 3 states. [2020-08-18 17:39:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:39:44,709 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2020-08-18 17:39:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:39:44,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 17:39:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:39:44,727 INFO L225 Difference]: With dead ends: 343 [2020-08-18 17:39:44,728 INFO L226 Difference]: Without dead ends: 185 [2020-08-18 17:39:44,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:39:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-18 17:39:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 149. [2020-08-18 17:39:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 17:39:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2020-08-18 17:39:44,856 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 46 [2020-08-18 17:39:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:39:44,857 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2020-08-18 17:39:44,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:39:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2020-08-18 17:39:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 17:39:44,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:39:44,869 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 17:39:44,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:39:44,869 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:39:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:39:44,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2016430514, now seen corresponding path program 1 times [2020-08-18 17:39:44,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:39:44,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130304305] [2020-08-18 17:39:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:39:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:45,246 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:39:45,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:39:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:45,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:39:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:45,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:39:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:45,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:39:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:45,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:39:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:45,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:39:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:45,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:39:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:45,287 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 17:39:45,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130304305] [2020-08-18 17:39:45,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:39:45,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:39:45,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610289945] [2020-08-18 17:39:45,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:39:45,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:39:45,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:39:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:39:45,291 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 4 states. [2020-08-18 17:39:45,705 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:39:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:39:46,742 INFO L93 Difference]: Finished difference Result 270 states and 333 transitions. [2020-08-18 17:39:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:39:46,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 17:39:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:39:46,746 INFO L225 Difference]: With dead ends: 270 [2020-08-18 17:39:46,747 INFO L226 Difference]: Without dead ends: 169 [2020-08-18 17:39:46,749 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 17:39:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-18 17:39:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2020-08-18 17:39:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 17:39:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2020-08-18 17:39:46,790 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 47 [2020-08-18 17:39:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:39:46,791 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2020-08-18 17:39:46,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:39:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2020-08-18 17:39:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 17:39:46,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:39:46,793 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 17:39:46,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:39:46,794 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:39:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:39:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1603631393, now seen corresponding path program 1 times [2020-08-18 17:39:46,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:39:46,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487372020] [2020-08-18 17:39:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:39:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:47,098 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:39:47,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:39:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:47,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:39:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:47,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:39:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:47,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:39:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:47,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:39:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:47,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:39:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:47,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 17:39:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:47,193 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 17:39:47,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487372020] [2020-08-18 17:39:47,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:39:47,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:39:47,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807526246] [2020-08-18 17:39:47,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:39:47,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:39:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:39:47,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:39:47,196 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand 8 states. [2020-08-18 17:39:47,562 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:39:47,882 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:48,116 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:48,339 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:49,044 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:39:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:39:51,090 INFO L93 Difference]: Finished difference Result 476 states and 596 transitions. [2020-08-18 17:39:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:39:51,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 17:39:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:39:51,102 INFO L225 Difference]: With dead ends: 476 [2020-08-18 17:39:51,102 INFO L226 Difference]: Without dead ends: 360 [2020-08-18 17:39:51,104 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 17:39:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-08-18 17:39:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 298. [2020-08-18 17:39:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-08-18 17:39:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2020-08-18 17:39:51,189 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 51 [2020-08-18 17:39:51,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:39:51,190 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2020-08-18 17:39:51,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:39:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2020-08-18 17:39:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 17:39:51,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:39:51,192 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 17:39:51,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:39:51,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:39:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:39:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1180849517, now seen corresponding path program 1 times [2020-08-18 17:39:51,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:39:51,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976931661] [2020-08-18 17:39:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:39:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,488 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:39:51,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:39:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:39:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:39:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:39:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:39:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:39:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 17:39:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 17:39:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:51,602 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 17:39:51,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976931661] [2020-08-18 17:39:51,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:39:51,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:39:51,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806965033] [2020-08-18 17:39:51,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:39:51,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:39:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:39:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:39:51,605 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand 8 states. [2020-08-18 17:39:51,962 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:39:52,829 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:53,270 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:39:53,587 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:53,849 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:54,488 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:39:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:39:55,682 INFO L93 Difference]: Finished difference Result 960 states and 1249 transitions. [2020-08-18 17:39:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:39:55,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 17:39:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:39:55,689 INFO L225 Difference]: With dead ends: 960 [2020-08-18 17:39:55,689 INFO L226 Difference]: Without dead ends: 686 [2020-08-18 17:39:55,692 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 17:39:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-08-18 17:39:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 551. [2020-08-18 17:39:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-08-18 17:39:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 678 transitions. [2020-08-18 17:39:55,812 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 678 transitions. Word has length 57 [2020-08-18 17:39:55,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:39:55,813 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 678 transitions. [2020-08-18 17:39:55,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:39:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 678 transitions. [2020-08-18 17:39:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:39:55,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:39:55,816 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 17:39:55,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:39:55,816 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:39:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:39:55,817 INFO L82 PathProgramCache]: Analyzing trace with hash -687352489, now seen corresponding path program 1 times [2020-08-18 17:39:55,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:39:55,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351282343] [2020-08-18 17:39:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:39:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,092 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:39:56,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:39:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:39:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:39:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:39:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:39:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:39:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:39:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 17:39:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 17:39:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:39:56,205 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 17:39:56,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351282343] [2020-08-18 17:39:56,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:39:56,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 17:39:56,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529018109] [2020-08-18 17:39:56,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:39:56,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:39:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:39:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:39:56,207 INFO L87 Difference]: Start difference. First operand 551 states and 678 transitions. Second operand 9 states. [2020-08-18 17:39:56,609 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:39:57,497 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:57,775 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:58,023 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:39:58,703 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:39:58,997 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:40:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:40:00,205 INFO L93 Difference]: Finished difference Result 1523 states and 2048 transitions. [2020-08-18 17:40:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:40:00,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 17:40:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:40:00,213 INFO L225 Difference]: With dead ends: 1523 [2020-08-18 17:40:00,213 INFO L226 Difference]: Without dead ends: 996 [2020-08-18 17:40:00,216 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 17:40:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-08-18 17:40:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 815. [2020-08-18 17:40:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 815 states. [2020-08-18 17:40:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1007 transitions. [2020-08-18 17:40:00,373 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1007 transitions. Word has length 61 [2020-08-18 17:40:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:40:00,373 INFO L479 AbstractCegarLoop]: Abstraction has 815 states and 1007 transitions. [2020-08-18 17:40:00,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:40:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1007 transitions. [2020-08-18 17:40:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 17:40:00,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:40:00,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:40:00,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:40:00,377 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:40:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:40:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1185420344, now seen corresponding path program 1 times [2020-08-18 17:40:00,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:40:00,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571980538] [2020-08-18 17:40:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:40:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,630 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:40:00,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:40:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:40:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:40:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:40:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:40:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:40:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:40:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:40:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:40:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 17:40:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 17:40:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:00,768 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 17:40:00,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571980538] [2020-08-18 17:40:00,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:40:00,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 17:40:00,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859611682] [2020-08-18 17:40:00,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:40:00,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:40:00,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:40:00,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:40:00,771 INFO L87 Difference]: Start difference. First operand 815 states and 1007 transitions. Second operand 9 states. [2020-08-18 17:40:01,795 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:40:02,072 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 17:40:02,355 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:40:02,634 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:40:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:40:03,892 INFO L93 Difference]: Finished difference Result 1863 states and 2473 transitions. [2020-08-18 17:40:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:40:03,893 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-08-18 17:40:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:40:03,904 INFO L225 Difference]: With dead ends: 1863 [2020-08-18 17:40:03,904 INFO L226 Difference]: Without dead ends: 1072 [2020-08-18 17:40:03,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:40:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-08-18 17:40:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 841. [2020-08-18 17:40:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2020-08-18 17:40:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1035 transitions. [2020-08-18 17:40:04,107 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1035 transitions. Word has length 88 [2020-08-18 17:40:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:40:04,108 INFO L479 AbstractCegarLoop]: Abstraction has 841 states and 1035 transitions. [2020-08-18 17:40:04,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:40:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1035 transitions. [2020-08-18 17:40:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 17:40:04,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:40:04,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:40:04,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:40:04,113 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:40:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:40:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -910660730, now seen corresponding path program 1 times [2020-08-18 17:40:04,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:40:04,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589324816] [2020-08-18 17:40:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:40:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,382 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:40:04,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:40:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:40:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:40:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:40:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:40:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:40:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:40:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:40:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:40:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 17:40:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 17:40:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:04,585 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 17:40:04,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589324816] [2020-08-18 17:40:04,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:40:04,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 17:40:04,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106026953] [2020-08-18 17:40:04,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:40:04,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:40:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:40:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:40:04,598 INFO L87 Difference]: Start difference. First operand 841 states and 1035 transitions. Second operand 11 states. [2020-08-18 17:40:05,226 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:40:05,495 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:40:05,772 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:40:06,504 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:40:06,775 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:40:07,038 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:40:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:40:08,448 INFO L93 Difference]: Finished difference Result 1917 states and 2592 transitions. [2020-08-18 17:40:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:40:08,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 88 [2020-08-18 17:40:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:40:08,458 INFO L225 Difference]: With dead ends: 1917 [2020-08-18 17:40:08,458 INFO L226 Difference]: Without dead ends: 1100 [2020-08-18 17:40:08,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:40:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-08-18 17:40:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 857. [2020-08-18 17:40:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-08-18 17:40:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1051 transitions. [2020-08-18 17:40:08,689 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1051 transitions. Word has length 88 [2020-08-18 17:40:08,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:40:08,690 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1051 transitions. [2020-08-18 17:40:08,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:40:08,690 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1051 transitions. [2020-08-18 17:40:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 17:40:08,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:40:08,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:40:08,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:40:08,694 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:40:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:40:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1039639525, now seen corresponding path program 1 times [2020-08-18 17:40:08,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:40:08,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564872293] [2020-08-18 17:40:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:40:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:08,978 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:40:08,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:40:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:40:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:40:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:40:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:40:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:40:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:40:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:40:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:40:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:40:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 17:40:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 17:40:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:40:09,133 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 17:40:09,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564872293] [2020-08-18 17:40:09,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:40:09,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:40:09,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873571511] [2020-08-18 17:40:09,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:40:09,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:40:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:40:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:40:09,137 INFO L87 Difference]: Start difference. First operand 857 states and 1051 transitions. Second operand 7 states. [2020-08-18 17:40:09,534 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:40:10,029 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:40:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:40:12,661 INFO L93 Difference]: Finished difference Result 2846 states and 3865 transitions. [2020-08-18 17:40:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:40:12,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-08-18 17:40:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:40:12,676 INFO L225 Difference]: With dead ends: 2846 [2020-08-18 17:40:12,677 INFO L226 Difference]: Without dead ends: 2013 [2020-08-18 17:40:12,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:40:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2020-08-18 17:40:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1711. [2020-08-18 17:40:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1711 states. [2020-08-18 17:40:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2117 transitions. [2020-08-18 17:40:13,048 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2117 transitions. Word has length 88 [2020-08-18 17:40:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:40:13,049 INFO L479 AbstractCegarLoop]: Abstraction has 1711 states and 2117 transitions. [2020-08-18 17:40:13,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:40:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2117 transitions. [2020-08-18 17:40:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:40:13,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:40:13,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:40:13,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:40:13,052 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:40:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:40:13,053 INFO L82 PathProgramCache]: Analyzing trace with hash 745790239, now seen corresponding path program 1 times [2020-08-18 17:40:13,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:40:13,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079830215] [2020-08-18 17:40:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:40:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:40:13,118 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:40:13,118 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:40:13,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:40:13,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:40:13 BoogieIcfgContainer [2020-08-18 17:40:13,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:40:13,162 INFO L168 Benchmark]: Toolchain (without parser) took 32692.04 ms. Allocated memory was 140.5 MB in the beginning and 678.4 MB in the end (delta: 537.9 MB). Free memory was 102.6 MB in the beginning and 218.2 MB in the end (delta: -115.6 MB). Peak memory consumption was 422.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:40:13,163 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:40:13,167 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.60 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.4 MB in the beginning and 173.7 MB in the end (delta: -71.3 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:40:13,170 INFO L168 Benchmark]: Boogie Preprocessor took 90.54 ms. Allocated memory is still 204.5 MB. Free memory was 173.7 MB in the beginning and 169.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:40:13,172 INFO L168 Benchmark]: RCFGBuilder took 1310.94 ms. Allocated memory was 204.5 MB in the beginning and 237.0 MB in the end (delta: 32.5 MB). Free memory was 169.6 MB in the beginning and 196.1 MB in the end (delta: -26.5 MB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:40:13,173 INFO L168 Benchmark]: TraceAbstraction took 30602.93 ms. Allocated memory was 237.0 MB in the beginning and 678.4 MB in the end (delta: 441.5 MB). Free memory was 196.1 MB in the beginning and 218.2 MB in the end (delta: -22.1 MB). Peak memory consumption was 419.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:40:13,182 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 682.60 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.4 MB in the beginning and 173.7 MB in the end (delta: -71.3 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 90.54 ms. Allocated memory is still 204.5 MB. Free memory was 173.7 MB in the beginning and 169.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1310.94 ms. Allocated memory was 204.5 MB in the beginning and 237.0 MB in the end (delta: 32.5 MB). Free memory was 169.6 MB in the beginning and 196.1 MB in the end (delta: -26.5 MB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30602.93 ms. Allocated memory was 237.0 MB in the beginning and 678.4 MB in the end (delta: 441.5 MB). Free memory was 196.1 MB in the beginning and 218.2 MB in the end (delta: -22.1 MB). Peak memory consumption was 419.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 506]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L159] int pumpRunning = 0; [L160] int systemActive = 1; [L399] int waterLevel = 1; [L400] int methaneLevelCritical = 0; [L511] int cleanupTimeShifts = 4; [L802] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L584] int retValue_acc ; [L585] int tmp ; [L589] FCALL select_helpers() [L590] FCALL select_features() [L591] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L591] RET, EXPR valid_product() [L591] tmp = valid_product() [L593] COND TRUE \read(tmp) [L595] FCALL setup() [L596] CALL runTest() [L578] CALL test() [L84] int splverifierCounter ; [L85] int tmp ; [L86] int tmp___0 ; [L87] int tmp___1 ; [L88] int tmp___2 ; [L91] splverifierCounter = 0 [L93] COND TRUE 1 [L95] COND TRUE splverifierCounter < 4 [L101] tmp = __VERIFIER_nondet_int() [L103] COND TRUE \read(tmp) [L105] CALL waterRise() [L417] COND TRUE waterLevel < 2 [L418] waterLevel = waterLevel + 1 [L105] RET waterRise() [L111] tmp___0 = __VERIFIER_nondet_int() [L113] COND TRUE \read(tmp___0) [L115] CALL changeMethaneLevel() [L429] COND FALSE !(\read(methaneLevelCritical)) [L432] methaneLevelCritical = 1 [L115] RET changeMethaneLevel() [L121] tmp___2 = __VERIFIER_nondet_int() [L123] COND TRUE \read(tmp___2) [L138] CALL timeShift() [L167] COND FALSE !(\read(pumpRunning)) [L174] COND TRUE \read(systemActive) [L176] CALL processEnvironment() [L248] int tmp ; [L251] COND FALSE !(\read(pumpRunning)) [L266] CALL processEnvironment__wrappee__lowWaterSensor() [L222] int tmp ; [L225] COND FALSE !(\read(pumpRunning)) [L240] CALL processEnvironment__wrappee__highWaterSensor() [L196] int tmp ; [L199] COND TRUE ! pumpRunning [L201] CALL, EXPR isHighWaterLevel() [L345] int retValue_acc ; [L346] int tmp ; [L347] int tmp___0 ; [L351] CALL, EXPR isHighWaterSensorDry() [L479] int retValue_acc ; [L482] COND FALSE !(waterLevel < 2) [L486] retValue_acc = 0 [L487] return (retValue_acc); [L351] RET, EXPR isHighWaterSensorDry() [L351] tmp = isHighWaterSensorDry() [L353] COND FALSE !(\read(tmp)) [L356] tmp___0 = 1 [L358] retValue_acc = tmp___0 [L359] return (retValue_acc); [L201] RET, EXPR isHighWaterLevel() [L201] tmp = isHighWaterLevel() [L203] COND TRUE \read(tmp) [L205] CALL activatePump() [L276] pumpRunning = 1 [L205] RET activatePump() [L240] RET processEnvironment__wrappee__highWaterSensor() [L266] RET processEnvironment__wrappee__lowWaterSensor() [L176] RET processEnvironment() [L182] CALL __utac_acc__Specification1_spec__1() [L608] int tmp ; [L609] int tmp___0 ; [L613] CALL, EXPR isMethaneLevelCritical() [L438] int retValue_acc ; [L441] retValue_acc = methaneLevelCritical [L442] return (retValue_acc); [L613] RET, EXPR isMethaneLevelCritical() [L613] tmp = isMethaneLevelCritical() [L615] COND TRUE \read(tmp) [L617] CALL, EXPR isPumpRunning() [L300] int retValue_acc ; [L303] retValue_acc = pumpRunning [L304] return (retValue_acc); [L617] RET, EXPR isPumpRunning() [L617] tmp___0 = isPumpRunning() [L619] COND TRUE \read(tmp___0) [L621] CALL __automaton_fail() [L506] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 42 procedures, 251 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.4s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 25.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1102 SDtfs, 1942 SDslu, 1152 SDs, 0 SdLazy, 5840 SolverSat, 1210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1711occurred 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, 1219 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 618 NumberOfCodeBlocks, 618 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 157644 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...