/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:49:09,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:49:09,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:49:09,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:49:09,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:49:09,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:49:09,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:49:09,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:49:09,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:49:09,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:49:09,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:49:09,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:49:09,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:49:09,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:49:09,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:49:09,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:49:09,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:49:09,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:49:09,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:49:09,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:49:09,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:49:09,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:49:09,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:49:09,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:49:09,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:49:09,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:49:09,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:49:09,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:49:09,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:49:09,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:49:09,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:49:09,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:49:09,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:49:09,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:49:09,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:49:09,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:49:09,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:49:09,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:49:09,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:49:09,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:49:09,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:49:09,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:49:09,449 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:49:09,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:49:09,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:49:09,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:49:09,451 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:49:09,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:49:09,452 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:49:09,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:49:09,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:49:09,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:49:09,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:49:09,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:49:09,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:49:09,453 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:49:09,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:49:09,454 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:49:09,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:49:09,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:49:09,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:49:09,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:49:09,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:49:09,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:49:09,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:49:09,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:49:09,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:49:09,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:49:09,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:49:09,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:49:09,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:49:09,457 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:49:09,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:49:09,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:49:09,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:49:09,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:49:09,959 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:49:09,961 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c [2020-09-24 14:49:10,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3ad68b09/c32bfa3e47ea4235a218e2da4baf7906/FLAG2229eea1b [2020-09-24 14:49:10,728 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:49:10,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c [2020-09-24 14:49:10,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3ad68b09/c32bfa3e47ea4235a218e2da4baf7906/FLAG2229eea1b [2020-09-24 14:49:10,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3ad68b09/c32bfa3e47ea4235a218e2da4baf7906 [2020-09-24 14:49:10,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:49:10,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:49:10,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:49:10,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:49:10,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:49:10,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:49:10" (1/1) ... [2020-09-24 14:49:10,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27030054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:10, skipping insertion in model container [2020-09-24 14:49:10,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:49:10" (1/1) ... [2020-09-24 14:49:10,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:49:11,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:49:11,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:49:11,553 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:49:11,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:49:11,692 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:49:11,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11 WrapperNode [2020-09-24 14:49:11,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:49:11,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:49:11,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:49:11,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:49:11,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (1/1) ... [2020-09-24 14:49:11,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (1/1) ... [2020-09-24 14:49:11,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (1/1) ... [2020-09-24 14:49:11,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (1/1) ... [2020-09-24 14:49:11,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (1/1) ... [2020-09-24 14:49:11,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (1/1) ... [2020-09-24 14:49:11,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (1/1) ... [2020-09-24 14:49:11,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:49:11,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:49:11,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:49:11,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:49:11,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:49:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:49:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:49:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-24 14:49:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-24 14:49:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-24 14:49:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-24 14:49:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-24 14:49:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:49:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-09-24 14:49:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-24 14:49:11,889 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2020-09-24 14:49:11,889 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__highWaterSensor [2020-09-24 14:49:11,889 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2020-09-24 14:49:11,889 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__lowWaterSensor [2020-09-24 14:49:11,889 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2020-09-24 14:49:11,890 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__methaneAlarm [2020-09-24 14:49:11,890 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-24 14:49:11,890 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2020-09-24 14:49:11,890 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__role__methaneQuery [2020-09-24 14:49:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-24 14:49:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-24 14:49:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-24 14:49:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-24 14:49:11,891 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-24 14:49:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-24 14:49:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-09-24 14:49:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-09-24 14:49:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-09-24 14:49:11,892 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-24 14:49:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-24 14:49:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-24 14:49:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-24 14:49:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-24 14:49:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-24 14:49:11,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-24 14:49:11,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-24 14:49:11,894 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-24 14:49:11,894 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-24 14:49:11,894 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-24 14:49:11,894 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-24 14:49:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-24 14:49:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-24 14:49:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-24 14:49:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-09-24 14:49:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-24 14:49:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-24 14:49:11,896 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-24 14:49:11,896 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-24 14:49:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:49:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:49:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-24 14:49:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-24 14:49:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-24 14:49:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-24 14:49:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-24 14:49:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-24 14:49:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-24 14:49:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-24 14:49:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-24 14:49:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-24 14:49:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-24 14:49:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-24 14:49:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-24 14:49:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:49:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-24 14:49:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-24 14:49:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-24 14:49:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-09-24 14:49:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-24 14:49:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-24 14:49:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-24 14:49:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-24 14:49:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-09-24 14:49:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-24 14:49:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-24 14:49:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-09-24 14:49:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-09-24 14:49:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-24 14:49:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2020-09-24 14:49:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-24 14:49:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__highWaterSensor [2020-09-24 14:49:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2020-09-24 14:49:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-09-24 14:49:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__lowWaterSensor [2020-09-24 14:49:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2020-09-24 14:49:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-24 14:49:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__methaneAlarm [2020-09-24 14:49:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2020-09-24 14:49:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__role__methaneQuery [2020-09-24 14:49:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 14:49:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-24 14:49:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:49:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:49:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-24 14:49:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:49:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:49:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:49:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:49:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-24 14:49:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:49:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-24 14:49:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-24 14:49:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:49:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-24 14:49:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-24 14:49:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-24 14:49:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-24 14:49:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:49:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 14:49:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:49:13,313 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:49:13,313 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-24 14:49:13,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:49:13 BoogieIcfgContainer [2020-09-24 14:49:13,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:49:13,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:49:13,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:49:13,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:49:13,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:49:10" (1/3) ... [2020-09-24 14:49:13,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d89397e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:49:13, skipping insertion in model container [2020-09-24 14:49:13,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:49:11" (2/3) ... [2020-09-24 14:49:13,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d89397e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:49:13, skipping insertion in model container [2020-09-24 14:49:13,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:49:13" (3/3) ... [2020-09-24 14:49:13,333 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_productSimulator.cil.c [2020-09-24 14:49:13,345 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:49:13,358 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:49:13,383 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:49:13,420 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:49:13,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:49:13,421 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:49:13,421 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:49:13,421 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:49:13,421 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:49:13,422 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:49:13,422 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:49:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states. [2020-09-24 14:49:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-09-24 14:49:13,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:49:13,477 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:49:13,478 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:49:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:49:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1119932632, now seen corresponding path program 1 times [2020-09-24 14:49:13,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:49:13,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597170563] [2020-09-24 14:49:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:49:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,563 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-09-24 14:49:14,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:49:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:49:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-24 14:49:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-24 14:49:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 14:49:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:49:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 14:49:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 14:49:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:49:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:49:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-24 14:49:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-09-24 14:49:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-09-24 14:49:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-24 14:49:14,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597170563] [2020-09-24 14:49:14,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:49:14,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:49:14,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968767815] [2020-09-24 14:49:14,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:49:14,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:49:14,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:49:14,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:49:14,821 INFO L87 Difference]: Start difference. First operand 420 states. Second operand 5 states. [2020-09-24 14:49:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:49:17,575 INFO L93 Difference]: Finished difference Result 676 states and 815 transitions. [2020-09-24 14:49:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:49:17,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-09-24 14:49:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:49:17,602 INFO L225 Difference]: With dead ends: 676 [2020-09-24 14:49:17,603 INFO L226 Difference]: Without dead ends: 427 [2020-09-24 14:49:17,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:49:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-09-24 14:49:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 369. [2020-09-24 14:49:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-24 14:49:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 414 transitions. [2020-09-24 14:49:17,750 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 414 transitions. Word has length 224 [2020-09-24 14:49:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:49:17,752 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 414 transitions. [2020-09-24 14:49:17,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:49:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 414 transitions. [2020-09-24 14:49:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-24 14:49:17,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:49:17,759 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:49:17,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:49:17,760 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:49:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:49:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash -259914180, now seen corresponding path program 1 times [2020-09-24 14:49:17,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:49:17,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128343798] [2020-09-24 14:49:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:49:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,276 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-09-24 14:49:18,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:49:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:49:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-24 14:49:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-24 14:49:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 14:49:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:49:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 14:49:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 14:49:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:49:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:49:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-24 14:49:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-09-24 14:49:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-09-24 14:49:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-24 14:49:18,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128343798] [2020-09-24 14:49:18,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:49:18,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:49:18,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276215962] [2020-09-24 14:49:18,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:49:18,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:49:18,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:49:18,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:49:18,447 INFO L87 Difference]: Start difference. First operand 369 states and 414 transitions. Second operand 6 states. [2020-09-24 14:49:19,289 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-09-24 14:49:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:49:21,465 INFO L93 Difference]: Finished difference Result 585 states and 678 transitions. [2020-09-24 14:49:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:49:21,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 225 [2020-09-24 14:49:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:49:21,472 INFO L225 Difference]: With dead ends: 585 [2020-09-24 14:49:21,472 INFO L226 Difference]: Without dead ends: 410 [2020-09-24 14:49:21,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:49:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-09-24 14:49:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 359. [2020-09-24 14:49:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-09-24 14:49:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 401 transitions. [2020-09-24 14:49:21,559 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 401 transitions. Word has length 225 [2020-09-24 14:49:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:49:21,560 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 401 transitions. [2020-09-24 14:49:21,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:49:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 401 transitions. [2020-09-24 14:49:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-09-24 14:49:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:49:21,565 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:49:21,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:49:21,566 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:49:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:49:21,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1768944640, now seen corresponding path program 1 times [2020-09-24 14:49:21,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:49:21,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430224860] [2020-09-24 14:49:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:49:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,147 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-09-24 14:49:22,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:49:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:49:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-24 14:49:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-24 14:49:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 14:49:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:49:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 14:49:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 14:49:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:49:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:49:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-24 14:49:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-09-24 14:49:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-09-24 14:49:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-24 14:49:22,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430224860] [2020-09-24 14:49:22,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:49:22,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-24 14:49:22,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829094728] [2020-09-24 14:49:22,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:49:22,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:49:22,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:49:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:49:22,542 INFO L87 Difference]: Start difference. First operand 359 states and 401 transitions. Second operand 13 states. [2020-09-24 14:49:23,221 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-09-24 14:49:24,060 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 211 [2020-09-24 14:49:25,182 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-09-24 14:49:25,907 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-09-24 14:49:27,467 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-09-24 14:49:27,947 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-09-24 14:49:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:49:32,887 INFO L93 Difference]: Finished difference Result 935 states and 1103 transitions. [2020-09-24 14:49:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:49:32,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 235 [2020-09-24 14:49:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:49:32,895 INFO L225 Difference]: With dead ends: 935 [2020-09-24 14:49:32,895 INFO L226 Difference]: Without dead ends: 728 [2020-09-24 14:49:32,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2020-09-24 14:49:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-09-24 14:49:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 628. [2020-09-24 14:49:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-09-24 14:49:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 723 transitions. [2020-09-24 14:49:33,015 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 723 transitions. Word has length 235 [2020-09-24 14:49:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:49:33,016 INFO L479 AbstractCegarLoop]: Abstraction has 628 states and 723 transitions. [2020-09-24 14:49:33,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:49:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 723 transitions. [2020-09-24 14:49:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-24 14:49:33,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:49:33,021 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:49:33,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:49:33,022 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:49:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:49:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1023057379, now seen corresponding path program 1 times [2020-09-24 14:49:33,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:49:33,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654876064] [2020-09-24 14:49:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:49:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,570 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-09-24 14:49:33,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:49:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:49:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-24 14:49:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-24 14:49:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 14:49:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:49:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 14:49:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 14:49:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:49:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:49:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-24 14:49:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-09-24 14:49:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-24 14:49:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:33,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-24 14:49:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-24 14:49:34,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654876064] [2020-09-24 14:49:34,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:49:34,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 14:49:34,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715244256] [2020-09-24 14:49:34,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:49:34,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:49:34,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:49:34,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:49:34,172 INFO L87 Difference]: Start difference. First operand 628 states and 723 transitions. Second operand 18 states. [2020-09-24 14:49:35,045 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-09-24 14:49:35,863 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 211 [2020-09-24 14:49:37,141 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-09-24 14:49:37,904 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-09-24 14:49:39,053 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-09-24 14:49:40,307 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-09-24 14:49:42,298 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-09-24 14:49:43,195 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-09-24 14:49:44,146 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-09-24 14:49:44,679 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-09-24 14:49:45,144 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-09-24 14:49:45,916 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 218 [2020-09-24 14:49:46,347 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-09-24 14:49:46,782 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-09-24 14:49:47,499 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-09-24 14:49:47,991 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-09-24 14:49:48,638 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-09-24 14:49:49,130 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-09-24 14:49:49,662 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-09-24 14:49:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:49:55,399 INFO L93 Difference]: Finished difference Result 2222 states and 2846 transitions. [2020-09-24 14:49:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-24 14:49:55,400 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 244 [2020-09-24 14:49:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:49:55,411 INFO L225 Difference]: With dead ends: 2222 [2020-09-24 14:49:55,412 INFO L226 Difference]: Without dead ends: 1746 [2020-09-24 14:49:55,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=563, Invalid=1987, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 14:49:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2020-09-24 14:49:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1575. [2020-09-24 14:49:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2020-09-24 14:49:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 1928 transitions. [2020-09-24 14:49:55,780 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 1928 transitions. Word has length 244 [2020-09-24 14:49:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:49:55,781 INFO L479 AbstractCegarLoop]: Abstraction has 1575 states and 1928 transitions. [2020-09-24 14:49:55,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:49:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 1928 transitions. [2020-09-24 14:49:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-09-24 14:49:55,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:49:55,789 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:49:55,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:49:55,789 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:49:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:49:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1338254, now seen corresponding path program 1 times [2020-09-24 14:49:55,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:49:55,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287794483] [2020-09-24 14:49:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:49:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,217 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-09-24 14:49:56,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:49:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:49:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-24 14:49:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-24 14:49:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 14:49:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:49:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 14:49:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 14:49:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:49:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:49:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-24 14:49:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-09-24 14:49:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-09-24 14:49:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-24 14:49:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-09-24 14:49:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:49:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-24 14:49:56,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287794483] [2020-09-24 14:49:56,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:49:56,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:49:56,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145208507] [2020-09-24 14:49:56,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:49:56,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:49:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:49:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:49:56,492 INFO L87 Difference]: Start difference. First operand 1575 states and 1928 transitions. Second operand 8 states. [2020-09-24 14:49:57,119 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-09-24 14:50:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:50:01,463 INFO L93 Difference]: Finished difference Result 3632 states and 4795 transitions. [2020-09-24 14:50:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:50:01,464 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 249 [2020-09-24 14:50:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:50:01,476 INFO L225 Difference]: With dead ends: 3632 [2020-09-24 14:50:01,476 INFO L226 Difference]: Without dead ends: 2209 [2020-09-24 14:50:01,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:50:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2020-09-24 14:50:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2074. [2020-09-24 14:50:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2020-09-24 14:50:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 2571 transitions. [2020-09-24 14:50:01,775 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 2571 transitions. Word has length 249 [2020-09-24 14:50:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:50:01,776 INFO L479 AbstractCegarLoop]: Abstraction has 2074 states and 2571 transitions. [2020-09-24 14:50:01,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:50:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 2571 transitions. [2020-09-24 14:50:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-09-24 14:50:01,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:50:01,784 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:50:01,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:50:01,784 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:50:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:50:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2070153751, now seen corresponding path program 1 times [2020-09-24 14:50:01,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:50:01,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781573522] [2020-09-24 14:50:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:50:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,257 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-09-24 14:50:02,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:50:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:50:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-24 14:50:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-24 14:50:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 14:50:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 14:50:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 14:50:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 14:50:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:50:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:50:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-24 14:50:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-09-24 14:50:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-09-24 14:50:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-09-24 14:50:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:50:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:50:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-09-24 14:50:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2020-09-24 14:50:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-09-24 14:50:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:50:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-24 14:50:02,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781573522] [2020-09-24 14:50:02,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:50:02,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:50:02,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723538874] [2020-09-24 14:50:02,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:50:02,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:50:02,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:50:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:50:02,639 INFO L87 Difference]: Start difference. First operand 2074 states and 2571 transitions. Second operand 12 states. [2020-09-24 14:50:03,786 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 210 [2020-09-24 14:50:05,136 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-09-24 14:50:09,632 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 210