/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:02:20,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:02:20,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:02:20,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:02:20,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:02:20,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:02:20,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:02:20,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:02:20,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:02:20,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:02:20,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:02:20,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:02:20,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:02:20,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:02:20,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:02:20,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:02:20,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:02:20,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:02:20,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:02:20,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:02:20,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:02:20,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:02:20,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:02:20,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:02:20,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:02:20,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:02:20,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:02:20,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:02:20,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:02:20,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:02:20,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:02:20,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:02:20,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:02:20,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:02:20,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:02:20,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:02:20,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:02:20,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:02:20,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:02:20,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:02:20,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:02:20,442 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 [2020-09-21 10:02:20,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:02:20,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:02:20,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:02:20,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:02:20,496 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:02:20,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:02:20,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:02:20,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:02:20,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:02:20,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:02:20,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:02:20,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:02:20,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:02:20,499 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:02:20,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:02:20,500 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:02:20,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:02:20,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:02:20,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:02:20,501 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:02:20,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:02:20,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:02:20,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:02:20,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:02:20,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:02:20,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:02:20,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:02:20,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:02:20,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:02:20,503 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 -> false [2020-09-21 10:02:20,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:02:20,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:02:20,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:02:20,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:02:20,938 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:02:20,939 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-09-21 10:02:21,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/567226a8a/d3a49baba4564821b392986a67d32422/FLAGb919da397 [2020-09-21 10:02:21,606 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:02:21,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-09-21 10:02:21,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/567226a8a/d3a49baba4564821b392986a67d32422/FLAGb919da397 [2020-09-21 10:02:21,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/567226a8a/d3a49baba4564821b392986a67d32422 [2020-09-21 10:02:21,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:02:21,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:02:21,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:02:21,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:02:21,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:02:21,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:02:21" (1/1) ... [2020-09-21 10:02:21,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2894617f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:21, skipping insertion in model container [2020-09-21 10:02:21,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:02:21" (1/1) ... [2020-09-21 10:02:21,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:02:22,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:02:22,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:02:22,437 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:02:22,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:02:22,641 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:02:22,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22 WrapperNode [2020-09-21 10:02:22,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:02:22,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:02:22,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:02:22,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:02:22,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (1/1) ... [2020-09-21 10:02:22,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (1/1) ... [2020-09-21 10:02:22,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (1/1) ... [2020-09-21 10:02:22,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (1/1) ... [2020-09-21 10:02:22,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (1/1) ... [2020-09-21 10:02:22,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (1/1) ... [2020-09-21 10:02:22,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (1/1) ... [2020-09-21 10:02:22,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:02:22,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:02:22,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:02:22,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:02:22,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (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 [2020-09-21 10:02:22,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:02:22,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:02:22,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-21 10:02:22,812 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-21 10:02:22,812 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-21 10:02:22,813 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-21 10:02:22,813 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:02:22,814 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-21 10:02:22,814 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-21 10:02:22,814 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-21 10:02:22,814 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-21 10:02:22,815 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-21 10:02:22,815 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-21 10:02:22,816 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-21 10:02:22,816 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-09-21 10:02:22,817 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-09-21 10:02:22,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-21 10:02:22,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-21 10:02:22,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-21 10:02:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-21 10:02:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-21 10:02:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-21 10:02:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-21 10:02:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-21 10:02:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-21 10:02:22,819 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-21 10:02:22,819 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-21 10:02:22,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-09-21 10:02:22,820 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-21 10:02:22,820 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-21 10:02:22,820 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-21 10:02:22,820 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-21 10:02:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:02:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-21 10:02:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-21 10:02:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-21 10:02:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-21 10:02:22,821 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-21 10:02:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-21 10:02:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-21 10:02:22,822 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-09-21 10:02:22,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:02:22,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:02:22,822 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:02:22,823 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-21 10:02:22,823 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-21 10:02:22,823 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-09-21 10:02:22,823 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-21 10:02:22,823 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-21 10:02:22,823 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-21 10:02:22,823 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-21 10:02:22,824 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-21 10:02:22,824 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-21 10:02:22,824 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-21 10:02:22,824 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-09-21 10:02:22,824 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-21 10:02:22,824 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-21 10:02:22,825 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-21 10:02:22,825 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-21 10:02:22,825 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-09-21 10:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-21 10:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-21 10:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-21 10:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-09-21 10:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-21 10:02:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:02:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-21 10:02:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:02:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:02:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-21 10:02:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:02:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:02:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:02:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:02:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-21 10:02:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:02:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-21 10:02:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-21 10:02:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:02:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-21 10:02:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-21 10:02:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-21 10:02:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-21 10:02:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-21 10:02:22,831 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-21 10:02:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-21 10:02:22,832 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-21 10:02:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-21 10:02:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-21 10:02:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-21 10:02:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:02:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-21 10:02:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:02:22,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:02:22,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:02:23,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:02:23,831 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 10:02:23,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:02:23 BoogieIcfgContainer [2020-09-21 10:02:23,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:02:23,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:02:23,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:02:23,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:02:23,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:02:21" (1/3) ... [2020-09-21 10:02:23,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44cef68a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:02:23, skipping insertion in model container [2020-09-21 10:02:23,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:02:22" (2/3) ... [2020-09-21 10:02:23,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44cef68a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:02:23, skipping insertion in model container [2020-09-21 10:02:23,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:02:23" (3/3) ... [2020-09-21 10:02:23,846 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product51.cil.c [2020-09-21 10:02:23,854 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:02:23,864 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:02:23,883 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:02:23,908 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:02:23,908 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:02:23,908 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:02:23,908 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:02:23,908 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:02:23,908 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:02:23,908 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:02:23,909 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:02:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-09-21 10:02:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 10:02:23,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:23,947 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] [2020-09-21 10:02:23,947 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash -199381509, now seen corresponding path program 1 times [2020-09-21 10:02:23,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:23,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910434800] [2020-09-21 10:02:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,700 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:24,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:02:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:02:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:02:24,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910434800] [2020-09-21 10:02:24,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:24,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:02:24,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740458791] [2020-09-21 10:02:24,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:02:24,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:24,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:02:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:02:24,823 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-09-21 10:02:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:25,994 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-09-21 10:02:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:02:25,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-09-21 10:02:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:26,014 INFO L225 Difference]: With dead ends: 311 [2020-09-21 10:02:26,015 INFO L226 Difference]: Without dead ends: 168 [2020-09-21 10:02:26,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:02:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-21 10:02:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-09-21 10:02:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-21 10:02:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-09-21 10:02:26,122 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-09-21 10:02:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:26,122 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-09-21 10:02:26,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:02:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-09-21 10:02:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 10:02:26,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:26,127 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] [2020-09-21 10:02:26,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:02:26,128 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:26,128 INFO L82 PathProgramCache]: Analyzing trace with hash 822116352, now seen corresponding path program 1 times [2020-09-21 10:02:26,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:26,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439068934] [2020-09-21 10:02:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:26,524 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:26,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:26,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:26,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:26,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:26,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:26,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:02:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:26,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:02:26,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439068934] [2020-09-21 10:02:26,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:26,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:02:26,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972380624] [2020-09-21 10:02:26,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:02:26,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:26,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:02:26,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:02:26,588 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-09-21 10:02:27,017 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:27,844 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-09-21 10:02:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:02:27,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-09-21 10:02:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:27,848 INFO L225 Difference]: With dead ends: 238 [2020-09-21 10:02:27,848 INFO L226 Difference]: Without dead ends: 152 [2020-09-21 10:02:27,850 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 [2020-09-21 10:02:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-21 10:02:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-09-21 10:02:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-21 10:02:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-09-21 10:02:27,903 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-09-21 10:02:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:27,903 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-09-21 10:02:27,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:02:27,904 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-09-21 10:02:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:02:27,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:27,911 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] [2020-09-21 10:02:27,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:02:27,911 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1772796698, now seen corresponding path program 1 times [2020-09-21 10:02:27,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:27,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138534120] [2020-09-21 10:02:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,360 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:28,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:02:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:02:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:02:28,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138534120] [2020-09-21 10:02:28,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:28,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:02:28,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025454618] [2020-09-21 10:02:28,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:02:28,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:02:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:02:28,471 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-09-21 10:02:28,896 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:29,299 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:29,613 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:29,901 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:30,743 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:32,698 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-09-21 10:02:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:02:32,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-21 10:02:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:32,706 INFO L225 Difference]: With dead ends: 427 [2020-09-21 10:02:32,706 INFO L226 Difference]: Without dead ends: 326 [2020-09-21 10:02:32,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:02:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-09-21 10:02:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-09-21 10:02:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-09-21 10:02:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-09-21 10:02:32,780 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-09-21 10:02:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:32,780 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-09-21 10:02:32,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:02:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-09-21 10:02:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:02:32,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:32,783 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] [2020-09-21 10:02:32,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:02:32,784 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1539786498, now seen corresponding path program 1 times [2020-09-21 10:02:32,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:32,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178302397] [2020-09-21 10:02:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,177 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:33,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:02:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:02:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:02:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:02:33,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178302397] [2020-09-21 10:02:33,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:33,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:02:33,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075503534] [2020-09-21 10:02:33,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:02:33,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:33,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:02:33,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:02:33,293 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 8 states. [2020-09-21 10:02:33,650 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:34,836 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:35,227 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:35,569 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:35,920 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:36,468 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:37,475 INFO L93 Difference]: Finished difference Result 862 states and 1117 transitions. [2020-09-21 10:02:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:02:37,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-09-21 10:02:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:37,483 INFO L225 Difference]: With dead ends: 862 [2020-09-21 10:02:37,483 INFO L226 Difference]: Without dead ends: 618 [2020-09-21 10:02:37,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:02:37,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-09-21 10:02:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 491. [2020-09-21 10:02:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-09-21 10:02:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 598 transitions. [2020-09-21 10:02:37,608 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 598 transitions. Word has length 57 [2020-09-21 10:02:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:37,608 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 598 transitions. [2020-09-21 10:02:37,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:02:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 598 transitions. [2020-09-21 10:02:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:02:37,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:37,612 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] [2020-09-21 10:02:37,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:02:37,612 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1493126654, now seen corresponding path program 1 times [2020-09-21 10:02:37,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:37,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284412927] [2020-09-21 10:02:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,028 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:38,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:02:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:02:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:02:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:02:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:02:38,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284412927] [2020-09-21 10:02:38,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:38,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:02:38,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812837440] [2020-09-21 10:02:38,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:02:38,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:38,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:02:38,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:02:38,177 INFO L87 Difference]: Start difference. First operand 491 states and 598 transitions. Second operand 9 states. [2020-09-21 10:02:38,561 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:39,552 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:39,905 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:40,244 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:40,834 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:41,203 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:42,108 INFO L93 Difference]: Finished difference Result 1371 states and 1840 transitions. [2020-09-21 10:02:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:02:42,109 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-09-21 10:02:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:42,119 INFO L225 Difference]: With dead ends: 1371 [2020-09-21 10:02:42,119 INFO L226 Difference]: Without dead ends: 904 [2020-09-21 10:02:42,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:02:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-09-21 10:02:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 723. [2020-09-21 10:02:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-09-21 10:02:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 891 transitions. [2020-09-21 10:02:42,257 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 891 transitions. Word has length 61 [2020-09-21 10:02:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:42,258 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 891 transitions. [2020-09-21 10:02:42,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:02:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 891 transitions. [2020-09-21 10:02:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-21 10:02:42,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:42,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:42,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:02:42,261 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash 807556796, now seen corresponding path program 1 times [2020-09-21 10:02:42,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:42,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725112462] [2020-09-21 10:02:42,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,556 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:42,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:02:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:02:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:02:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:02:42,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725112462] [2020-09-21 10:02:42,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:42,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:02:42,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149898302] [2020-09-21 10:02:42,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:02:42,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:42,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:02:42,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:02:42,723 INFO L87 Difference]: Start difference. First operand 723 states and 891 transitions. Second operand 9 states. [2020-09-21 10:02:43,983 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:44,292 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:02:44,613 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:44,933 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:46,090 INFO L93 Difference]: Finished difference Result 1679 states and 2233 transitions. [2020-09-21 10:02:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:02:46,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-09-21 10:02:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:46,103 INFO L225 Difference]: With dead ends: 1679 [2020-09-21 10:02:46,103 INFO L226 Difference]: Without dead ends: 980 [2020-09-21 10:02:46,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:02:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-09-21 10:02:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 749. [2020-09-21 10:02:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-09-21 10:02:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 919 transitions. [2020-09-21 10:02:46,261 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 919 transitions. Word has length 83 [2020-09-21 10:02:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:46,262 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 919 transitions. [2020-09-21 10:02:46,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:02:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 919 transitions. [2020-09-21 10:02:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-21 10:02:46,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:46,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:46,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:02:46,267 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:46,268 INFO L82 PathProgramCache]: Analyzing trace with hash 830189050, now seen corresponding path program 1 times [2020-09-21 10:02:46,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:46,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87435217] [2020-09-21 10:02:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,684 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:46,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:02:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:02:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:02:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:02:46,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87435217] [2020-09-21 10:02:46,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:46,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:02:46,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559704806] [2020-09-21 10:02:46,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:02:46,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:02:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:02:46,866 INFO L87 Difference]: Start difference. First operand 749 states and 919 transitions. Second operand 11 states. [2020-09-21 10:02:47,379 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:47,677 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:47,975 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:48,712 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:49,047 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:49,348 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:50,742 INFO L93 Difference]: Finished difference Result 1733 states and 2344 transitions. [2020-09-21 10:02:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:02:50,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-09-21 10:02:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:50,750 INFO L225 Difference]: With dead ends: 1733 [2020-09-21 10:02:50,750 INFO L226 Difference]: Without dead ends: 1008 [2020-09-21 10:02:50,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:02:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-09-21 10:02:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 765. [2020-09-21 10:02:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-09-21 10:02:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-09-21 10:02:50,917 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 83 [2020-09-21 10:02:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:50,917 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-09-21 10:02:50,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:02:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-09-21 10:02:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-21 10:02:50,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:50,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:50,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:02:50,922 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1855681049, now seen corresponding path program 1 times [2020-09-21 10:02:50,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:50,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113222878] [2020-09-21 10:02:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,303 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:51,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:02:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:02:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:02:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:02:51,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113222878] [2020-09-21 10:02:51,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:51,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:02:51,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118406238] [2020-09-21 10:02:51,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:02:51,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:51,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:02:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:02:51,470 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 7 states. [2020-09-21 10:02:51,959 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:52,545 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:55,192 INFO L93 Difference]: Finished difference Result 2622 states and 3569 transitions. [2020-09-21 10:02:55,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:02:55,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-09-21 10:02:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:55,206 INFO L225 Difference]: With dead ends: 2622 [2020-09-21 10:02:55,206 INFO L226 Difference]: Without dead ends: 1881 [2020-09-21 10:02:55,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:02:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-09-21 10:02:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1579. [2020-09-21 10:02:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-09-21 10:02:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1949 transitions. [2020-09-21 10:02:55,499 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1949 transitions. Word has length 83 [2020-09-21 10:02:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:55,500 INFO L479 AbstractCegarLoop]: Abstraction has 1579 states and 1949 transitions. [2020-09-21 10:02:55,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:02:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1949 transitions. [2020-09-21 10:02:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 10:02:55,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:55,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:55,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:02:55,503 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1308897473, now seen corresponding path program 1 times [2020-09-21 10:02:55,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:55,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773793408] [2020-09-21 10:02:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:02:55,587 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:02:55,587 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:02:55,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:02:55,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:02:55 BoogieIcfgContainer [2020-09-21 10:02:55,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:02:55,637 INFO L168 Benchmark]: Toolchain (without parser) took 33719.06 ms. Allocated memory was 141.0 MB in the beginning and 633.3 MB in the end (delta: 492.3 MB). Free memory was 102.3 MB in the beginning and 221.6 MB in the end (delta: -119.3 MB). Peak memory consumption was 373.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:55,637 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-09-21 10:02:55,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 716.52 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 101.4 MB in the beginning and 174.5 MB in the end (delta: -73.1 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:55,648 INFO L168 Benchmark]: Boogie Preprocessor took 90.99 ms. Allocated memory is still 205.0 MB. Free memory was 174.5 MB in the beginning and 169.7 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:55,649 INFO L168 Benchmark]: RCFGBuilder took 1103.29 ms. Allocated memory was 205.0 MB in the beginning and 235.4 MB in the end (delta: 30.4 MB). Free memory was 169.7 MB in the beginning and 194.3 MB in the end (delta: -24.6 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:55,650 INFO L168 Benchmark]: TraceAbstraction took 31796.30 ms. Allocated memory was 235.4 MB in the beginning and 633.3 MB in the end (delta: 397.9 MB). Free memory was 192.7 MB in the beginning and 221.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 369.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:55,657 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 716.52 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 101.4 MB in the beginning and 174.5 MB in the end (delta: -73.1 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 90.99 ms. Allocated memory is still 205.0 MB. Free memory was 174.5 MB in the beginning and 169.7 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1103.29 ms. Allocated memory was 205.0 MB in the beginning and 235.4 MB in the end (delta: 30.4 MB). Free memory was 169.7 MB in the beginning and 194.3 MB in the end (delta: -24.6 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31796.30 ms. Allocated memory was 235.4 MB in the beginning and 633.3 MB in the end (delta: 397.9 MB). Free memory was 192.7 MB in the beginning and 221.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 369.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 704]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L121] int pumpRunning = 0; [L122] int systemActive = 1; [L503] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L773] int cleanupTimeShifts = 4; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; [L846] int retValue_acc ; [L847] int tmp ; [L851] FCALL select_helpers() [L852] FCALL select_features() [L853] CALL, EXPR valid_product() [L738] int retValue_acc ; [L741] retValue_acc = 1 [L742] return (retValue_acc); [L853] RET, EXPR valid_product() [L853] tmp = valid_product() [L855] COND TRUE \read(tmp) [L857] FCALL setup() [L858] CALL runTest() [L840] CALL test() [L46] int splverifierCounter ; [L47] int tmp ; [L48] int tmp___0 ; [L49] int tmp___1 ; [L50] int tmp___2 ; [L53] splverifierCounter = 0 [L55] COND TRUE 1 [L57] COND TRUE splverifierCounter < 4 [L63] tmp = __VERIFIER_nondet_int() [L65] COND TRUE \read(tmp) [L67] CALL waterRise() [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 [L67] RET waterRise() [L73] tmp___0 = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp___0) [L77] CALL changeMethaneLevel() [L900] COND FALSE !(\read(methaneLevelCritical)) [L903] methaneLevelCritical = 1 [L77] RET changeMethaneLevel() [L83] tmp___2 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___2) [L100] CALL timeShift() [L129] COND FALSE !(\read(pumpRunning)) [L136] COND TRUE \read(systemActive) [L138] CALL processEnvironment() [L184] int tmp ; [L187] COND FALSE !(\read(pumpRunning)) [L202] CALL processEnvironment__wrappee__highWaterSensor() [L158] int tmp ; [L161] COND TRUE ! pumpRunning [L163] CALL, EXPR isHighWaterLevel() [L281] int retValue_acc ; [L282] int tmp ; [L283] int tmp___0 ; [L287] CALL, EXPR isHighWaterSensorDry() [L950] int retValue_acc ; [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); [L287] RET, EXPR isHighWaterSensorDry() [L287] tmp = isHighWaterSensorDry() [L289] COND FALSE !(\read(tmp)) [L292] tmp___0 = 1 [L294] retValue_acc = tmp___0 [L295] return (retValue_acc); [L163] RET, EXPR isHighWaterLevel() [L163] tmp = isHighWaterLevel() [L165] COND TRUE \read(tmp) [L167] CALL activatePump() [L212] pumpRunning = 1 [L167] RET activatePump() [L202] RET processEnvironment__wrappee__highWaterSensor() [L138] RET processEnvironment() [L144] CALL __utac_acc__Specification1_spec__1() [L748] int tmp ; [L749] int tmp___0 ; [L753] CALL, EXPR isMethaneLevelCritical() [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); [L753] RET, EXPR isMethaneLevelCritical() [L753] tmp = isMethaneLevelCritical() [L755] COND TRUE \read(tmp) [L757] CALL, EXPR isPumpRunning() [L236] int retValue_acc ; [L239] retValue_acc = pumpRunning [L240] return (retValue_acc); [L757] RET, EXPR isPumpRunning() [L757] tmp___0 = isPumpRunning() [L759] COND TRUE \read(tmp___0) [L761] CALL __automaton_fail() [L704] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 241 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31.6s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 25.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 991 SDtfs, 1945 SDslu, 1035 SDs, 0 SdLazy, 5164 SolverSat, 1208 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 10.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 1203 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 150744 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...