/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:54:22,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:54:22,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:54:22,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:54:22,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:54:22,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:54:22,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:54:22,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:54:22,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:54:22,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:54:22,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:54:22,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:54:22,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:54:22,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:54:22,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:54:22,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:54:22,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:54:22,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:54:22,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:54:22,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:54:22,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:54:22,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:54:22,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:54:22,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:54:22,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:54:22,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:54:22,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:54:22,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:54:22,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:54:22,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:54:22,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:54:22,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:54:22,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:54:22,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:54:22,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:54:22,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:54:22,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:54:22,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:54:22,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:54:22,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:54:22,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:54:22,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:54:22,846 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:54:22,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:54:22,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:54:22,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:54:22,848 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:54:22,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:54:22,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:54:22,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:54:22,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:54:22,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:54:22,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:54:22,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:54:22,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:54:22,850 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:54:22,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:54:22,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:54:22,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:54:22,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:54:22,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:54:22,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:54:22,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:54:22,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:54:22,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:54:22,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:54:22,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:54:22,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:54:22,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:54:22,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:54:22,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:54:22,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 11:54:23,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:54:23,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:54:23,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:54:23,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:54:23,200 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:54:23,201 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-08-18 11:54:23,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7ddbd17a/8ca944972d20441cbf13b549ea84b896/FLAG4236066c8 [2020-08-18 11:54:23,819 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:54:23,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-08-18 11:54:23,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7ddbd17a/8ca944972d20441cbf13b549ea84b896/FLAG4236066c8 [2020-08-18 11:54:24,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7ddbd17a/8ca944972d20441cbf13b549ea84b896 [2020-08-18 11:54:24,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:54:24,211 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:54:24,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:54:24,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:54:24,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:54:24,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e33c961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24, skipping insertion in model container [2020-08-18 11:54:24,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:54:24,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:54:24,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:54:24,710 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:54:24,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:54:24,848 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:54:24,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24 WrapperNode [2020-08-18 11:54:24,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:54:24,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:54:24,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:54:24,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:54:24,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (1/1) ... [2020-08-18 11:54:24,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:54:24,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:54:24,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:54:24,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:54:24,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:54:25,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:54:25,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:54:25,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 11:54:25,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 11:54:25,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 11:54:25,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 11:54:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 11:54:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 11:54:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 11:54:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 11:54:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 11:54:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 11:54:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 11:54:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 11:54:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 11:54:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 11:54:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 11:54:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 11:54:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 11:54:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 11:54:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-18 11:54:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 11:54:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 11:54:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 11:54:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 11:54:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 11:54:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 11:54:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 11:54:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 11:54:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 11:54:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 11:54:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:54:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 11:54:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 11:54:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 11:54:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 11:54:25,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 11:54:25,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 11:54:25,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:54:25,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:54:25,029 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 11:54:25,029 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 11:54:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:54:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:54:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 11:54:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 11:54:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:54:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:54:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:54:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 11:54:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:54:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 11:54:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 11:54:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:54:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 11:54:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 11:54:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:54:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 11:54:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 11:54:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 11:54:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 11:54:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 11:54:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 11:54:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 11:54:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 11:54:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 11:54:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 11:54:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 11:54:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 11:54:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 11:54:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 11:54:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 11:54:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 11:54:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 11:54:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 11:54:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 11:54:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-18 11:54:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 11:54:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 11:54:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 11:54:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 11:54:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 11:54:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 11:54:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 11:54:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:54:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 11:54:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 11:54:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:54:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 11:54:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:54:26,116 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:54:26,116 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 11:54:26,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:54:26 BoogieIcfgContainer [2020-08-18 11:54:26,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:54:26,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:54:26,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:54:26,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:54:26,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:54:24" (1/3) ... [2020-08-18 11:54:26,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa0b681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:54:26, skipping insertion in model container [2020-08-18 11:54:26,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:24" (2/3) ... [2020-08-18 11:54:26,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa0b681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:54:26, skipping insertion in model container [2020-08-18 11:54:26,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:54:26" (3/3) ... [2020-08-18 11:54:26,129 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product41.cil.c [2020-08-18 11:54:26,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:54:26,148 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:54:26,162 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:54:26,185 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:54:26,185 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:54:26,186 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:54:26,186 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:54:26,186 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:54:26,186 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:54:26,186 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:54:26,187 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:54:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-08-18 11:54:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 11:54:26,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:26,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:54:26,221 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:26,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1904787813, now seen corresponding path program 1 times [2020-08-18 11:54:26,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:26,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141614569] [2020-08-18 11:54:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,908 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:26,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:54:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:26,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 11:54:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:27,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141614569] [2020-08-18 11:54:27,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:27,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 11:54:27,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648245703] [2020-08-18 11:54:27,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 11:54:27,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:27,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 11:54:27,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:54:27,064 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 3 states. [2020-08-18 11:54:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:28,130 INFO L93 Difference]: Finished difference Result 275 states and 361 transitions. [2020-08-18 11:54:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:54:28,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 11:54:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:28,147 INFO L225 Difference]: With dead ends: 275 [2020-08-18 11:54:28,147 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 11:54:28,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:54:28,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 11:54:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2020-08-18 11:54:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-18 11:54:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-08-18 11:54:28,243 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 46 [2020-08-18 11:54:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:28,243 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-08-18 11:54:28,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 11:54:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-08-18 11:54:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 11:54:28,254 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:28,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:54:28,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:54:28,255 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:28,256 INFO L82 PathProgramCache]: Analyzing trace with hash -8679295, now seen corresponding path program 1 times [2020-08-18 11:54:28,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:28,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394723368] [2020-08-18 11:54:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,655 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:28,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:54:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:54:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:28,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394723368] [2020-08-18 11:54:28,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:28,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:54:28,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148316163] [2020-08-18 11:54:28,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:54:28,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:28,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:54:28,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:54:28,738 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 4 states. [2020-08-18 11:54:29,165 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:29,883 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2020-08-18 11:54:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:54:29,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 11:54:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:29,889 INFO L225 Difference]: With dead ends: 208 [2020-08-18 11:54:29,889 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 11:54:29,891 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 [2020-08-18 11:54:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 11:54:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-08-18 11:54:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 11:54:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-08-18 11:54:29,927 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 47 [2020-08-18 11:54:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:29,927 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-08-18 11:54:29,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:54:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-08-18 11:54:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 11:54:29,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:29,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:54:29,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:54:29,930 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1364944070, now seen corresponding path program 1 times [2020-08-18 11:54:29,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:29,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420405088] [2020-08-18 11:54:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:30,243 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:30,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:30,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:30,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:30,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:30,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:30,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:54:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:30,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:54:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:30,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420405088] [2020-08-18 11:54:30,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:30,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:54:30,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447865913] [2020-08-18 11:54:30,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:54:30,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:30,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:54:30,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:54:30,355 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 8 states. [2020-08-18 11:54:30,691 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:30,998 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:31,260 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:31,486 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:32,502 INFO L93 Difference]: Finished difference Result 217 states and 266 transitions. [2020-08-18 11:54:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:54:32,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 11:54:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:32,504 INFO L225 Difference]: With dead ends: 217 [2020-08-18 11:54:32,504 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 11:54:32,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:54:32,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 11:54:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-08-18 11:54:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 11:54:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-08-18 11:54:32,539 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 51 [2020-08-18 11:54:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:32,540 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-08-18 11:54:32,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:54:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-08-18 11:54:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 11:54:32,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:32,542 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] [2020-08-18 11:54:32,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:54:32,543 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:32,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1317252167, now seen corresponding path program 1 times [2020-08-18 11:54:32,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:32,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577839496] [2020-08-18 11:54:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,836 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:32,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 11:54:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 11:54:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 11:54:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:32,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577839496] [2020-08-18 11:54:32,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:32,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:54:32,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931238249] [2020-08-18 11:54:32,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:54:32,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:32,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:54:32,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:54:32,913 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 6 states. [2020-08-18 11:54:33,222 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:34,256 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:34,794 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2020-08-18 11:54:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:54:34,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-18 11:54:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:34,798 INFO L225 Difference]: With dead ends: 300 [2020-08-18 11:54:34,799 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 11:54:34,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:54:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 11:54:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2020-08-18 11:54:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-08-18 11:54:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2020-08-18 11:54:34,841 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 59 [2020-08-18 11:54:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:34,842 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2020-08-18 11:54:34,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:54:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2020-08-18 11:54:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 11:54:34,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:34,844 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] [2020-08-18 11:54:34,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:54:34,845 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:34,845 INFO L82 PathProgramCache]: Analyzing trace with hash 19293366, now seen corresponding path program 1 times [2020-08-18 11:54:34,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:34,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224039490] [2020-08-18 11:54:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,139 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:35,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 11:54:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 11:54:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 11:54:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:35,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224039490] [2020-08-18 11:54:35,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:35,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:54:35,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342451673] [2020-08-18 11:54:35,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:54:35,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:35,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:54:35,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:54:35,266 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 8 states. [2020-08-18 11:54:35,589 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:36,465 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:36,764 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:37,266 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:37,492 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:37,752 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:38,433 INFO L93 Difference]: Finished difference Result 520 states and 648 transitions. [2020-08-18 11:54:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:54:38,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-18 11:54:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:38,440 INFO L225 Difference]: With dead ends: 520 [2020-08-18 11:54:38,441 INFO L226 Difference]: Without dead ends: 369 [2020-08-18 11:54:38,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:54:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-08-18 11:54:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 305. [2020-08-18 11:54:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-18 11:54:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 352 transitions. [2020-08-18 11:54:38,564 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 352 transitions. Word has length 73 [2020-08-18 11:54:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:38,565 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 352 transitions. [2020-08-18 11:54:38,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:54:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 352 transitions. [2020-08-18 11:54:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 11:54:38,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:38,568 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] [2020-08-18 11:54:38,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:54:38,568 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -989642822, now seen corresponding path program 1 times [2020-08-18 11:54:38,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:38,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776169187] [2020-08-18 11:54:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,868 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:38,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:54:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:54:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 11:54:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:38,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 11:54:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:54:39,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776169187] [2020-08-18 11:54:39,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:39,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:54:39,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13885055] [2020-08-18 11:54:39,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:54:39,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:39,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:54:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:54:39,008 INFO L87 Difference]: Start difference. First operand 305 states and 352 transitions. Second operand 9 states. [2020-08-18 11:54:39,357 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:40,374 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:40,621 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:41,307 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:41,552 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:41,819 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:41,955 INFO L93 Difference]: Finished difference Result 408 states and 516 transitions. [2020-08-18 11:54:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 11:54:41,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-08-18 11:54:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:41,959 INFO L225 Difference]: With dead ends: 408 [2020-08-18 11:54:41,959 INFO L226 Difference]: Without dead ends: 405 [2020-08-18 11:54:41,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 11:54:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-08-18 11:54:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 305. [2020-08-18 11:54:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-18 11:54:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 351 transitions. [2020-08-18 11:54:42,020 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 351 transitions. Word has length 77 [2020-08-18 11:54:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:42,021 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 351 transitions. [2020-08-18 11:54:42,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:54:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 351 transitions. [2020-08-18 11:54:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 11:54:42,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:42,024 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] [2020-08-18 11:54:42,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:54:42,024 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash 636453553, now seen corresponding path program 1 times [2020-08-18 11:54:42,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:42,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973729466] [2020-08-18 11:54:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,338 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:42,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:54:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:54:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 11:54:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 11:54:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 11:54:42,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973729466] [2020-08-18 11:54:42,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:42,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:54:42,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018485228] [2020-08-18 11:54:42,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:54:42,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:42,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:54:42,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:54:42,467 INFO L87 Difference]: Start difference. First operand 305 states and 351 transitions. Second operand 9 states. [2020-08-18 11:54:43,299 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:43,574 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 11:54:43,807 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:44,039 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:44,850 INFO L93 Difference]: Finished difference Result 694 states and 873 transitions. [2020-08-18 11:54:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:54:44,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-08-18 11:54:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:44,854 INFO L225 Difference]: With dead ends: 694 [2020-08-18 11:54:44,854 INFO L226 Difference]: Without dead ends: 413 [2020-08-18 11:54:44,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:54:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-18 11:54:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 315. [2020-08-18 11:54:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-08-18 11:54:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 361 transitions. [2020-08-18 11:54:44,932 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 361 transitions. Word has length 93 [2020-08-18 11:54:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:44,933 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 361 transitions. [2020-08-18 11:54:44,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:54:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 361 transitions. [2020-08-18 11:54:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 11:54:44,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:44,935 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] [2020-08-18 11:54:44,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:54:44,936 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash -260939725, now seen corresponding path program 1 times [2020-08-18 11:54:44,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:44,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260077237] [2020-08-18 11:54:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,292 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:45,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:54:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:54:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 11:54:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 11:54:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 11:54:45,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260077237] [2020-08-18 11:54:45,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:45,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:54:45,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258078553] [2020-08-18 11:54:45,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:54:45,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:45,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:54:45,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:54:45,462 INFO L87 Difference]: Start difference. First operand 315 states and 361 transitions. Second operand 11 states. [2020-08-18 11:54:46,204 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:46,483 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:46,715 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:47,279 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:47,544 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:47,788 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:48,745 INFO L93 Difference]: Finished difference Result 714 states and 895 transitions. [2020-08-18 11:54:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:54:48,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-08-18 11:54:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:48,757 INFO L225 Difference]: With dead ends: 714 [2020-08-18 11:54:48,757 INFO L226 Difference]: Without dead ends: 423 [2020-08-18 11:54:48,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:54:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-08-18 11:54:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 323. [2020-08-18 11:54:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 11:54:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 369 transitions. [2020-08-18 11:54:48,835 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 369 transitions. Word has length 93 [2020-08-18 11:54:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:48,835 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 369 transitions. [2020-08-18 11:54:48,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:54:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 369 transitions. [2020-08-18 11:54:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 11:54:48,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:48,838 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] [2020-08-18 11:54:48,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:54:48,838 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:48,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1709999732, now seen corresponding path program 1 times [2020-08-18 11:54:48,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:48,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806802382] [2020-08-18 11:54:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,079 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:49,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:54:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:54:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 11:54:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 11:54:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 11:54:49,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806802382] [2020-08-18 11:54:49,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:49,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:54:49,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636059059] [2020-08-18 11:54:49,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:54:49,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:49,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:54:49,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:54:49,207 INFO L87 Difference]: Start difference. First operand 323 states and 369 transitions. Second operand 7 states. [2020-08-18 11:54:49,536 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:50,016 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:51,746 INFO L93 Difference]: Finished difference Result 997 states and 1285 transitions. [2020-08-18 11:54:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 11:54:51,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-18 11:54:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:51,756 INFO L225 Difference]: With dead ends: 997 [2020-08-18 11:54:51,757 INFO L226 Difference]: Without dead ends: 698 [2020-08-18 11:54:51,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:54:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-18 11:54:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 599. [2020-08-18 11:54:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-08-18 11:54:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 711 transitions. [2020-08-18 11:54:51,893 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 711 transitions. Word has length 93 [2020-08-18 11:54:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:51,894 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 711 transitions. [2020-08-18 11:54:51,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:54:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 711 transitions. [2020-08-18 11:54:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 11:54:51,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:51,905 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] [2020-08-18 11:54:51,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:54:51,905 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1136093798, now seen corresponding path program 1 times [2020-08-18 11:54:51,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:51,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931268079] [2020-08-18 11:54:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,186 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:52,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 11:54:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 11:54:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:54:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:54:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:54:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:54:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 11:54:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 11:54:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 11:54:52,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931268079] [2020-08-18 11:54:52,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:54:52,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 11:54:52,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123339524] [2020-08-18 11:54:52,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 11:54:52,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 11:54:52,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 11:54:52,523 INFO L87 Difference]: Start difference. First operand 599 states and 711 transitions. Second operand 17 states. [2020-08-18 11:54:53,070 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:53,384 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:53,624 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:53,870 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:54,468 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:55,337 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:55,634 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:55,899 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:56,170 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:56,552 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:56,842 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 11:54:57,445 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-18 11:54:58,013 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-18 11:54:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:59,439 INFO L93 Difference]: Finished difference Result 1238 states and 1532 transitions. [2020-08-18 11:54:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 11:54:59,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-08-18 11:54:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:59,445 INFO L225 Difference]: With dead ends: 1238 [2020-08-18 11:54:59,446 INFO L226 Difference]: Without dead ends: 663 [2020-08-18 11:54:59,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 11:54:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-08-18 11:54:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 567. [2020-08-18 11:54:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-08-18 11:54:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 660 transitions. [2020-08-18 11:54:59,548 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 660 transitions. Word has length 97 [2020-08-18 11:54:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:59,549 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 660 transitions. [2020-08-18 11:54:59,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 11:54:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 660 transitions. [2020-08-18 11:54:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 11:54:59,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:59,552 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] [2020-08-18 11:54:59,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:54:59,553 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash 773081915, now seen corresponding path program 1 times [2020-08-18 11:54:59,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:59,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035575837] [2020-08-18 11:54:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:54:59,614 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:54:59,614 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:54:59,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:54:59,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:54:59 BoogieIcfgContainer [2020-08-18 11:54:59,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:54:59,648 INFO L168 Benchmark]: Toolchain (without parser) took 35437.57 ms. Allocated memory was 140.0 MB in the beginning and 655.4 MB in the end (delta: 515.4 MB). Free memory was 102.0 MB in the beginning and 362.7 MB in the end (delta: -260.7 MB). Peak memory consumption was 254.7 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:59,649 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-18 11:54:59,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.21 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.0 MB in the beginning and 172.4 MB in the end (delta: -70.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:59,650 INFO L168 Benchmark]: Boogie Preprocessor took 111.75 ms. Allocated memory is still 203.4 MB. Free memory was 172.4 MB in the beginning and 167.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:59,651 INFO L168 Benchmark]: RCFGBuilder took 1160.29 ms. Allocated memory was 203.4 MB in the beginning and 236.5 MB in the end (delta: 33.0 MB). Free memory was 167.6 MB in the beginning and 198.5 MB in the end (delta: -30.9 MB). Peak memory consumption was 82.5 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:59,652 INFO L168 Benchmark]: TraceAbstraction took 33523.53 ms. Allocated memory was 236.5 MB in the beginning and 655.4 MB in the end (delta: 418.9 MB). Free memory was 196.8 MB in the beginning and 362.7 MB in the end (delta: -165.9 MB). Peak memory consumption was 253.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:54:59,655 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 637.21 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.0 MB in the beginning and 172.4 MB in the end (delta: -70.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.75 ms. Allocated memory is still 203.4 MB. Free memory was 172.4 MB in the beginning and 167.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1160.29 ms. Allocated memory was 203.4 MB in the beginning and 236.5 MB in the end (delta: 33.0 MB). Free memory was 167.6 MB in the beginning and 198.5 MB in the end (delta: -30.9 MB). Peak memory consumption was 82.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33523.53 ms. Allocated memory was 236.5 MB in the beginning and 655.4 MB in the end (delta: 418.9 MB). Free memory was 196.8 MB in the beginning and 362.7 MB in the end (delta: -165.9 MB). Peak memory consumption was 253.0 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: 33.4s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 27.5s, 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, 13.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 391 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 13.7s 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: 0.7s AutomataMinimizationTime, 10 MinimizatonAttempts, 680 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.1s 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...