/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_product41.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:01:53,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:01:53,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:01:53,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:01:53,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:01:54,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:01:54,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:01:54,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:01:54,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:01:54,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:01:54,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:01:54,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:01:54,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:01:54,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:01:54,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:01:54,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:01:54,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:01:54,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:01:54,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:01:54,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:01:54,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:01:54,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:01:54,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:01:54,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:01:54,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:01:54,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:01:54,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:01:54,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:01:54,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:01:54,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:01:54,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:01:54,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:01:54,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:01:54,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:01:54,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:01:54,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:01:54,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:01:54,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:01:54,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:01:54,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:01:54,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:01:54,069 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 10:01:54,118 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:01:54,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:01:54,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:01:54,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:01:54,121 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:01:54,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:01:54,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:01:54,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:01:54,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:01:54,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:01:54,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:01:54,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:01:54,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:01:54,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:01:54,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:01:54,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:01:54,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:01:54,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:01:54,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:01:54,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:01:54,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:01:54,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:01:54,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:01:54,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:01:54,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:01:54,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:01:54,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:01:54,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:01:54,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:01:54,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:01:54,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:01:54,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:01:54,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:01:54,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:01:54,591 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:01:54,592 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-09-21 10:01:54,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2428edb97/d2fa89d12a8a4c058c19c0af16390b1a/FLAG178e254b5 [2020-09-21 10:01:55,314 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:01:55,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-09-21 10:01:55,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2428edb97/d2fa89d12a8a4c058c19c0af16390b1a/FLAG178e254b5 [2020-09-21 10:01:55,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2428edb97/d2fa89d12a8a4c058c19c0af16390b1a [2020-09-21 10:01:55,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:01:55,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:01:55,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:01:55,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:01:55,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:01:55,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:01:55" (1/1) ... [2020-09-21 10:01:55,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1c8c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:55, skipping insertion in model container [2020-09-21 10:01:55,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:01:55" (1/1) ... [2020-09-21 10:01:55,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:01:55,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:01:56,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:01:56,183 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:01:56,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:01:56,315 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:01:56,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56 WrapperNode [2020-09-21 10:01:56,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:01:56,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:01:56,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:01:56,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:01:56,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (1/1) ... [2020-09-21 10:01:56,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (1/1) ... [2020-09-21 10:01:56,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (1/1) ... [2020-09-21 10:01:56,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (1/1) ... [2020-09-21 10:01:56,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (1/1) ... [2020-09-21 10:01:56,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (1/1) ... [2020-09-21 10:01:56,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (1/1) ... [2020-09-21 10:01:56,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:01:56,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:01:56,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:01:56,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:01:56,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (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 10:01:56,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:01:56,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:01:56,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-21 10:01:56,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-21 10:01:56,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-21 10:01:56,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-21 10:01:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-21 10:01:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-21 10:01:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-21 10:01:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-21 10:01:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-21 10:01:56,497 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-21 10:01:56,497 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-21 10:01:56,497 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-21 10:01:56,497 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-21 10:01:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-21 10:01:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-21 10:01:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-21 10:01:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-21 10:01:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-21 10:01:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-09-21 10:01:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-21 10:01:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-21 10:01:56,500 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-21 10:01:56,500 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-21 10:01:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-21 10:01:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-21 10:01:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-21 10:01:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-21 10:01:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-21 10:01:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-21 10:01:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:01:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-21 10:01:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-21 10:01:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-21 10:01:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-21 10:01:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-21 10:01:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-09-21 10:01:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:01:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:01:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-21 10:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-21 10:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:01:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-21 10:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-21 10:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-21 10:01:56,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:01:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-21 10:01:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-21 10:01:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:01:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-21 10:01:56,506 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-21 10:01:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-21 10:01:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-21 10:01:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-21 10:01:56,507 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-21 10:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-21 10:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-21 10:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-21 10:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-21 10:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-21 10:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-21 10:01:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-21 10:01:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-21 10:01:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-21 10:01:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-09-21 10:01:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-21 10:01:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-21 10:01:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-21 10:01:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-09-21 10:01:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-21 10:01:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-21 10:01:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-21 10:01:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-21 10:01:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-21 10:01:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-21 10:01:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-21 10:01:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:01:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-21 10:01:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-21 10:01:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:01:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:01:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:01:57,623 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:01:57,623 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 10:01:57,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:01:57 BoogieIcfgContainer [2020-09-21 10:01:57,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:01:57,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:01:57,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:01:57,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:01:57,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:01:55" (1/3) ... [2020-09-21 10:01:57,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404b2f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:01:57, skipping insertion in model container [2020-09-21 10:01:57,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:01:56" (2/3) ... [2020-09-21 10:01:57,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404b2f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:01:57, skipping insertion in model container [2020-09-21 10:01:57,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:01:57" (3/3) ... [2020-09-21 10:01:57,639 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product41.cil.c [2020-09-21 10:01:57,651 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:01:57,661 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:01:57,684 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:01:57,715 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:01:57,715 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:01:57,715 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:01:57,715 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:01:57,715 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:01:57,715 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:01:57,715 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:01:57,716 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:01:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-09-21 10:01:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 10:01:57,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:01:57,753 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 10:01:57,754 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:01:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:01:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1904787813, now seen corresponding path program 1 times [2020-09-21 10:01:57,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:01:57,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972028650] [2020-09-21 10:01:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:01:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:01:58,421 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:01:58,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:01:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:01:58,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:01:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:01:58,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:01:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:01:58,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:01:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:01:58,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:01:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:01:58,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:01:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:01:58,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:01:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:01:58,551 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 10:01:58,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972028650] [2020-09-21 10:01:58,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:01:58,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:01:58,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275809646] [2020-09-21 10:01:58,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:01:58,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:01:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:01:58,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:01:58,591 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 3 states. [2020-09-21 10:01:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:01:59,682 INFO L93 Difference]: Finished difference Result 275 states and 361 transitions. [2020-09-21 10:01:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:01:59,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-09-21 10:01:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:01:59,702 INFO L225 Difference]: With dead ends: 275 [2020-09-21 10:01:59,702 INFO L226 Difference]: Without dead ends: 149 [2020-09-21 10:01:59,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:01:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-21 10:01:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2020-09-21 10:01:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-21 10:01:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-09-21 10:01:59,802 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 46 [2020-09-21 10:01:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:01:59,802 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-09-21 10:01:59,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:01:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-09-21 10:01:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 10:01:59,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:01:59,807 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 10:01:59,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:01:59,807 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:01:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:01:59,808 INFO L82 PathProgramCache]: Analyzing trace with hash -8679295, now seen corresponding path program 1 times [2020-09-21 10:01:59,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:01:59,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501390328] [2020-09-21 10:01:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:01:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:00,223 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:00,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:00,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:00,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:00,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:00,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:00,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:02:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:00,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:00,280 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 10:02:00,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501390328] [2020-09-21 10:02:00,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:00,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:02:00,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591966850] [2020-09-21 10:02:00,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:02:00,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:02:00,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:02:00,284 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 4 states. [2020-09-21 10:02:00,734 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:01,611 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2020-09-21 10:02:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:02:01,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-09-21 10:02:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:01,616 INFO L225 Difference]: With dead ends: 208 [2020-09-21 10:02:01,616 INFO L226 Difference]: Without dead ends: 133 [2020-09-21 10:02:01,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:02:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-21 10:02:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-09-21 10:02:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-21 10:02:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-09-21 10:02:01,657 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 47 [2020-09-21 10:02:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:01,658 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-09-21 10:02:01,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:02:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-09-21 10:02:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:02:01,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:01,660 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 10:02:01,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:02:01,661 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1364944070, now seen corresponding path program 1 times [2020-09-21 10:02:01,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:01,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011313605] [2020-09-21 10:02:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:02,100 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:02,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:02,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:02,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:02,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:02,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:02,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:02:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:02,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:02:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:02,200 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 10:02:02,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011313605] [2020-09-21 10:02:02,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:02,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:02:02,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426661465] [2020-09-21 10:02:02,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:02:02,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:02:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:02:02,202 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 8 states. [2020-09-21 10:02:02,562 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:02,936 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:03,274 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:03,563 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:04,631 INFO L93 Difference]: Finished difference Result 217 states and 266 transitions. [2020-09-21 10:02:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:02:04,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-21 10:02:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:04,635 INFO L225 Difference]: With dead ends: 217 [2020-09-21 10:02:04,636 INFO L226 Difference]: Without dead ends: 133 [2020-09-21 10:02:04,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:02:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-21 10:02:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-09-21 10:02:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-21 10:02:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-09-21 10:02:04,667 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 51 [2020-09-21 10:02:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:04,667 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-09-21 10:02:04,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:02:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-09-21 10:02:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 10:02:04,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:04,669 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] [2020-09-21 10:02:04,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:02:04,670 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1317252167, now seen corresponding path program 1 times [2020-09-21 10:02:04,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:04,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708438021] [2020-09-21 10:02:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,026 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:05,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:02:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:02:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:02:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:05,153 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 10:02:05,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708438021] [2020-09-21 10:02:05,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:05,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:02:05,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151026972] [2020-09-21 10:02:05,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:02:05,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:05,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:02:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:02:05,157 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 6 states. [2020-09-21 10:02:05,539 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:06,708 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:07,330 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2020-09-21 10:02:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:02:07,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-09-21 10:02:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:07,334 INFO L225 Difference]: With dead ends: 300 [2020-09-21 10:02:07,335 INFO L226 Difference]: Without dead ends: 216 [2020-09-21 10:02:07,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:02:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-21 10:02:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2020-09-21 10:02:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-21 10:02:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2020-09-21 10:02:07,380 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 59 [2020-09-21 10:02:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:07,380 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2020-09-21 10:02:07,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:02:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2020-09-21 10:02:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 10:02:07,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:07,383 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] [2020-09-21 10:02:07,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:02:07,383 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash 19293366, now seen corresponding path program 1 times [2020-09-21 10:02:07,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:07,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427577988] [2020-09-21 10:02:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,780 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:07,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:02:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:02:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:02:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:07,924 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 10:02:07,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427577988] [2020-09-21 10:02:07,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:07,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:02:07,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890610096] [2020-09-21 10:02:07,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:02:07,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:02:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:02:07,927 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 8 states. [2020-09-21 10:02:08,303 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:09,335 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:09,708 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:10,335 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:10,623 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:10,951 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:11,759 INFO L93 Difference]: Finished difference Result 520 states and 648 transitions. [2020-09-21 10:02:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:02:11,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-09-21 10:02:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:11,765 INFO L225 Difference]: With dead ends: 520 [2020-09-21 10:02:11,765 INFO L226 Difference]: Without dead ends: 369 [2020-09-21 10:02:11,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 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 10:02:11,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-09-21 10:02:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 305. [2020-09-21 10:02:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-21 10:02:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 352 transitions. [2020-09-21 10:02:11,835 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 352 transitions. Word has length 73 [2020-09-21 10:02:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:11,835 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 352 transitions. [2020-09-21 10:02:11,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:02:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 352 transitions. [2020-09-21 10:02:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-21 10:02:11,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:11,838 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] [2020-09-21 10:02:11,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:02:11,838 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:11,839 INFO L82 PathProgramCache]: Analyzing trace with hash -989642822, now seen corresponding path program 1 times [2020-09-21 10:02:11,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:11,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572787703] [2020-09-21 10:02:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,264 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:12,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:02:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:02:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:02:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:12,391 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 10:02:12,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572787703] [2020-09-21 10:02:12,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:12,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:02:12,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921247060] [2020-09-21 10:02:12,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:02:12,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:02:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:02:12,393 INFO L87 Difference]: Start difference. First operand 305 states and 352 transitions. Second operand 9 states. [2020-09-21 10:02:12,792 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:14,000 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:14,336 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:15,221 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:15,579 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:15,880 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:16,059 INFO L93 Difference]: Finished difference Result 408 states and 516 transitions. [2020-09-21 10:02:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:02:16,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-09-21 10:02:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:16,064 INFO L225 Difference]: With dead ends: 408 [2020-09-21 10:02:16,064 INFO L226 Difference]: Without dead ends: 405 [2020-09-21 10:02:16,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:02:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-09-21 10:02:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 305. [2020-09-21 10:02:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-21 10:02:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 351 transitions. [2020-09-21 10:02:16,131 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 351 transitions. Word has length 77 [2020-09-21 10:02:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:16,132 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 351 transitions. [2020-09-21 10:02:16,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:02:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 351 transitions. [2020-09-21 10:02:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:02:16,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:16,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:16,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:02:16,135 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash 636453553, now seen corresponding path program 1 times [2020-09-21 10:02:16,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:16,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605002251] [2020-09-21 10:02:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,457 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:16,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:02:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:02:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:02:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:02:16,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605002251] [2020-09-21 10:02:16,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:16,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:02:16,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499670981] [2020-09-21 10:02:16,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:02:16,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:02:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:02:16,615 INFO L87 Difference]: Start difference. First operand 305 states and 351 transitions. Second operand 9 states. [2020-09-21 10:02:17,607 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-21 10:02:17,930 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:02:18,245 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:18,551 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:19,583 INFO L93 Difference]: Finished difference Result 694 states and 873 transitions. [2020-09-21 10:02:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:02:19,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-09-21 10:02:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:19,587 INFO L225 Difference]: With dead ends: 694 [2020-09-21 10:02:19,587 INFO L226 Difference]: Without dead ends: 413 [2020-09-21 10:02:19,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:02:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-09-21 10:02:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 315. [2020-09-21 10:02:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-09-21 10:02:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 361 transitions. [2020-09-21 10:02:19,677 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 361 transitions. Word has length 93 [2020-09-21 10:02:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:19,677 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 361 transitions. [2020-09-21 10:02:19,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:02:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 361 transitions. [2020-09-21 10:02:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:02:19,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:19,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:19,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:02:19,681 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash -260939725, now seen corresponding path program 1 times [2020-09-21 10:02:19,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:19,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281157767] [2020-09-21 10:02:19,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,040 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:20,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:02:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:02:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:02:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:02:20,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281157767] [2020-09-21 10:02:20,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:20,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:02:20,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278646588] [2020-09-21 10:02:20,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:02:20,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:20,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:02:20,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:02:20,224 INFO L87 Difference]: Start difference. First operand 315 states and 361 transitions. Second operand 11 states. [2020-09-21 10:02:20,877 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:21,197 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:21,494 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:22,193 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:22,506 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:22,814 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:02:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:23,993 INFO L93 Difference]: Finished difference Result 714 states and 895 transitions. [2020-09-21 10:02:23,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:02:23,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-09-21 10:02:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:23,999 INFO L225 Difference]: With dead ends: 714 [2020-09-21 10:02:23,999 INFO L226 Difference]: Without dead ends: 423 [2020-09-21 10:02:24,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 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 10:02:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-09-21 10:02:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 323. [2020-09-21 10:02:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-09-21 10:02:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 369 transitions. [2020-09-21 10:02:24,062 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 369 transitions. Word has length 93 [2020-09-21 10:02:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:24,063 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 369 transitions. [2020-09-21 10:02:24,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:02:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 369 transitions. [2020-09-21 10:02:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:02:24,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:24,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:24,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:02:24,066 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:24,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1709999732, now seen corresponding path program 1 times [2020-09-21 10:02:24,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:24,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246203478] [2020-09-21 10:02:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,445 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:24,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:02:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:02:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:02:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:02:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:02:24,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246203478] [2020-09-21 10:02:24,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:02:24,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:02:24,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903105558] [2020-09-21 10:02:24,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:02:24,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:02:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:02:24,601 INFO L87 Difference]: Start difference. First operand 323 states and 369 transitions. Second operand 7 states. [2020-09-21 10:02:24,957 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:25,546 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:27,426 INFO L93 Difference]: Finished difference Result 997 states and 1285 transitions. [2020-09-21 10:02:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:02:27,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-09-21 10:02:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:27,432 INFO L225 Difference]: With dead ends: 997 [2020-09-21 10:02:27,433 INFO L226 Difference]: Without dead ends: 698 [2020-09-21 10:02:27,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:02:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-09-21 10:02:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 599. [2020-09-21 10:02:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-09-21 10:02:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 711 transitions. [2020-09-21 10:02:27,570 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 711 transitions. Word has length 93 [2020-09-21 10:02:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:27,570 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 711 transitions. [2020-09-21 10:02:27,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:02:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 711 transitions. [2020-09-21 10:02:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-21 10:02:27,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:27,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:27,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:02:27,578 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:27,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1136093798, now seen corresponding path program 1 times [2020-09-21 10:02:27,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:27,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216695093] [2020-09-21 10:02:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:27,982 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-21 10:02:27,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:02:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:02:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:02:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:02:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:02:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:02:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:02:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:02:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:02:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:02:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:02:28,452 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 83 [2020-09-21 10:02:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:02:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:02:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:02:28,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216695093] [2020-09-21 10:02:28,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:02:28,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:02:28,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973233643] [2020-09-21 10:02:28,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:02:28,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:02:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:02:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:02:28,496 INFO L87 Difference]: Start difference. First operand 599 states and 711 transitions. Second operand 17 states. [2020-09-21 10:02:29,363 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:29,751 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:30,089 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:30,397 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:31,148 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-21 10:02:32,162 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:32,540 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:32,871 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:33,191 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:33,621 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:33,977 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:02:34,696 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-09-21 10:02:35,411 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-09-21 10:02:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:02:37,054 INFO L93 Difference]: Finished difference Result 1238 states and 1532 transitions. [2020-09-21 10:02:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 10:02:37,054 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-09-21 10:02:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:02:37,059 INFO L225 Difference]: With dead ends: 1238 [2020-09-21 10:02:37,059 INFO L226 Difference]: Without dead ends: 663 [2020-09-21 10:02:37,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 10:02:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-09-21 10:02:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 567. [2020-09-21 10:02:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-09-21 10:02:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 660 transitions. [2020-09-21 10:02:37,155 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 660 transitions. Word has length 97 [2020-09-21 10:02:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:02:37,156 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 660 transitions. [2020-09-21 10:02:37,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:02:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 660 transitions. [2020-09-21 10:02:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-21 10:02:37,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:02:37,159 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:02:37,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:02:37,159 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:02:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:02:37,160 INFO L82 PathProgramCache]: Analyzing trace with hash 773081915, now seen corresponding path program 1 times [2020-09-21 10:02:37,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:02:37,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710023375] [2020-09-21 10:02:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:02:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:02:37,242 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:02:37,242 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:02:37,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:02:37,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:02:37 BoogieIcfgContainer [2020-09-21 10:02:37,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:02:37,281 INFO L168 Benchmark]: Toolchain (without parser) took 41685.60 ms. Allocated memory was 141.0 MB in the beginning and 628.6 MB in the end (delta: 487.6 MB). Free memory was 103.5 MB in the beginning and 132.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 458.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:37,282 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:02:37,283 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.50 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 102.9 MB in the beginning and 173.6 MB in the end (delta: -70.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:37,284 INFO L168 Benchmark]: Boogie Preprocessor took 98.68 ms. Allocated memory is still 205.0 MB. Free memory was 173.6 MB in the beginning and 169.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:37,284 INFO L168 Benchmark]: RCFGBuilder took 1214.06 ms. Allocated memory was 205.0 MB in the beginning and 235.4 MB in the end (delta: 30.4 MB). Free memory was 169.5 MB in the beginning and 195.2 MB in the end (delta: -25.7 MB). Peak memory consumption was 81.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:37,285 INFO L168 Benchmark]: TraceAbstraction took 39648.53 ms. Allocated memory was 235.4 MB in the beginning and 628.6 MB in the end (delta: 393.2 MB). Free memory was 195.2 MB in the beginning and 132.4 MB in the end (delta: 62.8 MB). Peak memory consumption was 456.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:02:37,288 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 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 714.50 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 102.9 MB in the beginning and 173.6 MB in the end (delta: -70.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 98.68 ms. Allocated memory is still 205.0 MB. Free memory was 173.6 MB in the beginning and 169.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1214.06 ms. Allocated memory was 205.0 MB in the beginning and 235.4 MB in the end (delta: 30.4 MB). Free memory was 169.5 MB in the beginning and 195.2 MB in the end (delta: -25.7 MB). Peak memory consumption was 81.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39648.53 ms. Allocated memory was 235.4 MB in the beginning and 628.6 MB in the end (delta: 393.2 MB). Free memory was 195.2 MB in the beginning and 132.4 MB in the end (delta: 62.8 MB). Peak memory consumption was 456.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 887]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L480] int waterLevel = 1; [L481] int methaneLevelCritical = 0; [L578] int pumpRunning = 0; [L579] int systemActive = 1; [L749] int cleanupTimeShifts = 4; [L825] int retValue_acc ; [L826] int tmp ; [L830] FCALL select_helpers() [L831] FCALL select_features() [L832] CALL, EXPR valid_product() [L874] int retValue_acc ; [L877] retValue_acc = 1 [L878] return (retValue_acc); [L832] RET, EXPR valid_product() [L832] tmp = valid_product() [L834] COND TRUE \read(tmp) [L836] FCALL setup() [L837] CALL runTest() [L816] CALL test() [L411] int splverifierCounter ; [L412] int tmp ; [L413] int tmp___0 ; [L414] int tmp___1 ; [L415] int tmp___2 ; [L418] splverifierCounter = 0 [L420] COND TRUE 1 [L422] COND TRUE splverifierCounter < 4 [L428] tmp = __VERIFIER_nondet_int() [L430] COND TRUE \read(tmp) [L432] CALL waterRise() [L498] COND TRUE waterLevel < 2 [L499] waterLevel = waterLevel + 1 [L432] RET waterRise() [L438] tmp___0 = __VERIFIER_nondet_int() [L440] COND FALSE !(\read(tmp___0)) [L448] tmp___2 = __VERIFIER_nondet_int() [L450] COND TRUE \read(tmp___2) [L463] CALL timeShift() [L586] COND FALSE !(\read(pumpRunning)) [L593] COND TRUE \read(systemActive) [L595] CALL processEnvironment() [L615] int tmp ; [L618] COND TRUE ! pumpRunning [L620] CALL, EXPR isHighWaterLevel() [L730] int retValue_acc ; [L731] int tmp ; [L732] int tmp___0 ; [L736] CALL, EXPR isHighWaterSensorDry() [L560] int retValue_acc ; [L563] COND FALSE !(waterLevel < 2) [L567] retValue_acc = 0 [L568] return (retValue_acc); [L736] RET, EXPR isHighWaterSensorDry() [L736] tmp = isHighWaterSensorDry() [L738] COND FALSE !(\read(tmp)) [L741] tmp___0 = 1 [L743] retValue_acc = tmp___0 [L744] return (retValue_acc); [L620] RET, EXPR isHighWaterLevel() [L620] tmp = isHighWaterLevel() [L622] COND TRUE \read(tmp) [L624] CALL activatePump() [L649] int tmp ; [L653] CALL, EXPR isMethaneAlarm() [L674] int retValue_acc ; [L678] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L678] RET, EXPR isMethaneLevelCritical() [L678] retValue_acc = isMethaneLevelCritical() [L680] return (retValue_acc); [L653] RET, EXPR isMethaneAlarm() [L653] tmp = isMethaneAlarm() [L655] COND FALSE !(\read(tmp)) [L659] CALL activatePump__wrappee__highWaterSensor() [L643] pumpRunning = 1 [L659] RET activatePump__wrappee__highWaterSensor() [L624] RET activatePump() [L595] RET processEnvironment() [L601] CALL __utac_acc__Specification1_spec__1() [L893] int tmp ; [L894] int tmp___0 ; [L898] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L898] RET, EXPR isMethaneLevelCritical() [L898] tmp = isMethaneLevelCritical() [L900] COND FALSE !(\read(tmp)) [L601] RET __utac_acc__Specification1_spec__1() [L463] RET timeShift() [L420] COND TRUE 1 [L422] COND TRUE splverifierCounter < 4 [L428] tmp = __VERIFIER_nondet_int() [L430] COND FALSE !(\read(tmp)) [L438] tmp___0 = __VERIFIER_nondet_int() [L440] COND TRUE \read(tmp___0) [L442] CALL changeMethaneLevel() [L510] COND FALSE !(\read(methaneLevelCritical)) [L513] methaneLevelCritical = 1 [L442] RET changeMethaneLevel() [L448] tmp___2 = __VERIFIER_nondet_int() [L450] COND TRUE \read(tmp___2) [L463] CALL timeShift() [L586] COND TRUE \read(pumpRunning) [L588] CALL lowerWaterLevel() [L486] COND TRUE waterLevel > 0 [L487] waterLevel = waterLevel - 1 [L588] RET lowerWaterLevel() [L593] COND TRUE \read(systemActive) [L595] CALL processEnvironment() [L615] int tmp ; [L618] COND FALSE !(! pumpRunning) [L633] FCALL processEnvironment__wrappee__base() [L595] RET processEnvironment() [L601] CALL __utac_acc__Specification1_spec__1() [L893] int tmp ; [L894] int tmp___0 ; [L898] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L898] RET, EXPR isMethaneLevelCritical() [L898] tmp = isMethaneLevelCritical() [L900] COND TRUE \read(tmp) [L902] CALL, EXPR isPumpRunning() [L685] int retValue_acc ; [L688] retValue_acc = pumpRunning [L689] return (retValue_acc); [L902] RET, EXPR isPumpRunning() [L902] tmp___0 = isPumpRunning() [L904] COND TRUE \read(tmp___0) [L906] CALL __automaton_fail() [L887] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 222 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.5s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 32.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1133 SDtfs, 2290 SDslu, 1326 SDs, 0 SdLazy, 6349 SolverSat, 1428 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 391 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 16.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=599occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 10 MinimizatonAttempts, 680 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 719 ConstructedInterpolants, 0 QuantifiedInterpolants, 229226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 9 PerfectInterpolantSequences, 10/12 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...