/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec5_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:14:55,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:14:55,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:14:55,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:14:55,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:14:55,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:14:55,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:14:55,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:14:55,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:14:55,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:14:55,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:14:55,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:14:55,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:14:55,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:14:55,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:14:55,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:14:55,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:14:55,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:14:55,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:14:55,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:14:55,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:14:55,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:14:55,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:14:55,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:14:55,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:14:55,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:14:55,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:14:55,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:14:55,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:14:55,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:14:55,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:14:55,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:14:55,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:14:55,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:14:55,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:14:55,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:14:55,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:14:55,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:14:55,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:14:55,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:14:55,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:14:55,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:14:55,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:14:55,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:14:55,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:14:55,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:14:55,987 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:14:55,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:14:55,987 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:14:55,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:14:55,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:14:55,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:14:55,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:14:55,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:14:55,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:14:55,989 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:14:55,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:14:55,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:14:55,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:14:55,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:14:55,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:14:55,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:14:55,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:14:55,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:14:55,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:14:55,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:14:55,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:14:55,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:14:55,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:14:55,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:14:55,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:14:55,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:14:56,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:14:56,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:14:56,478 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:14:56,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:14:56,481 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:14:56,482 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product56.cil.c [2020-09-21 10:14:56,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27c75c662/b78be98c12214fd2a58edb4c2f1ba3c7/FLAGe95eea4e0 [2020-09-21 10:14:57,227 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:14:57,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec5_product56.cil.c [2020-09-21 10:14:57,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27c75c662/b78be98c12214fd2a58edb4c2f1ba3c7/FLAGe95eea4e0 [2020-09-21 10:14:57,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27c75c662/b78be98c12214fd2a58edb4c2f1ba3c7 [2020-09-21 10:14:57,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:14:57,417 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:14:57,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:14:57,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:14:57,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:14:57,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:14:57" (1/1) ... [2020-09-21 10:14:57,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556c1ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:57, skipping insertion in model container [2020-09-21 10:14:57,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:14:57" (1/1) ... [2020-09-21 10:14:57,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:14:57,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:14:57,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:14:57,930 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:14:58,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:14:58,190 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:14:58,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58 WrapperNode [2020-09-21 10:14:58,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:14:58,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:14:58,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:14:58,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:14:58,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (1/1) ... [2020-09-21 10:14:58,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (1/1) ... [2020-09-21 10:14:58,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (1/1) ... [2020-09-21 10:14:58,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (1/1) ... [2020-09-21 10:14:58,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (1/1) ... [2020-09-21 10:14:58,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (1/1) ... [2020-09-21 10:14:58,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (1/1) ... [2020-09-21 10:14:58,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:14:58,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:14:58,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:14:58,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:14:58,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:14:58,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:14:58,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:14:58,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-21 10:14:58,383 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-21 10:14:58,383 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-21 10:14:58,383 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-21 10:14:58,384 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-21 10:14:58,384 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-21 10:14:58,384 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-21 10:14:58,384 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-21 10:14:58,384 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-09-21 10:14:58,385 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-21 10:14:58,385 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-21 10:14:58,385 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:14:58,385 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-09-21 10:14:58,385 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-21 10:14:58,386 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-21 10:14:58,387 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-21 10:14:58,388 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-21 10:14:58,388 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-21 10:14:58,388 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-21 10:14:58,388 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-21 10:14:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-09-21 10:14:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-09-21 10:14:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-09-21 10:14:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-21 10:14:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-21 10:14:58,389 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-21 10:14:58,390 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-21 10:14:58,390 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-21 10:14:58,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-21 10:14:58,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2020-09-21 10:14:58,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2020-09-21 10:14:58,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2020-09-21 10:14:58,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-21 10:14:58,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-21 10:14:58,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-21 10:14:58,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-21 10:14:58,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-21 10:14:58,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-21 10:14:58,394 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-21 10:14:58,394 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-21 10:14:58,395 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-21 10:14:58,395 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-21 10:14:58,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:14:58,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:14:58,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:14:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:14:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-21 10:14:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-21 10:14:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-21 10:14:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-21 10:14:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-21 10:14:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-21 10:14:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-21 10:14:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-09-21 10:14:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:14:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-21 10:14:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-21 10:14:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-21 10:14:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-21 10:14:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-21 10:14:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-09-21 10:14:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-09-21 10:14:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2020-09-21 10:14:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2020-09-21 10:14:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-21 10:14:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-21 10:14:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-21 10:14:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:14:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-09-21 10:14:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-09-21 10:14:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-21 10:14:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-21 10:14:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-21 10:14:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-21 10:14:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-21 10:14:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-21 10:14:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-21 10:14:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-21 10:14:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2020-09-21 10:14:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-21 10:14:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:14:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:14:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-21 10:14:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:14:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:14:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:14:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:14:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-21 10:14:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:14:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-21 10:14:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-21 10:14:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:14:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-21 10:14:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-21 10:14:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-21 10:14:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-21 10:14:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-21 10:14:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-21 10:14:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:14:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:14:58,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:14:58,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:14:59,510 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:14:59,510 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 10:14:59,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:14:59 BoogieIcfgContainer [2020-09-21 10:14:59,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:14:59,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:14:59,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:14:59,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:14:59,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:14:57" (1/3) ... [2020-09-21 10:14:59,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aaad19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:14:59, skipping insertion in model container [2020-09-21 10:14:59,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:58" (2/3) ... [2020-09-21 10:14:59,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aaad19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:14:59, skipping insertion in model container [2020-09-21 10:14:59,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:14:59" (3/3) ... [2020-09-21 10:14:59,526 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product56.cil.c [2020-09-21 10:14:59,538 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:14:59,549 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:14:59,571 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:14:59,604 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:14:59,604 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:14:59,604 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:14:59,604 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:14:59,604 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:14:59,605 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:14:59,605 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:14:59,605 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:14:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states. [2020-09-21 10:14:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 10:14:59,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:59,647 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] [2020-09-21 10:14:59,648 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:59,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1747867680, now seen corresponding path program 1 times [2020-09-21 10:14:59,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:59,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024436391] [2020-09-21 10:14:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,417 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:00,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:15:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 10:15:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:00,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024436391] [2020-09-21 10:15:00,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:00,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:15:00,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238999678] [2020-09-21 10:15:00,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:15:00,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:00,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:15:00,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:15:00,645 INFO L87 Difference]: Start difference. First operand 209 states. Second operand 4 states. [2020-09-21 10:15:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:02,134 INFO L93 Difference]: Finished difference Result 366 states and 469 transitions. [2020-09-21 10:15:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:15:02,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-09-21 10:15:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:02,169 INFO L225 Difference]: With dead ends: 366 [2020-09-21 10:15:02,170 INFO L226 Difference]: Without dead ends: 201 [2020-09-21 10:15:02,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:15:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-21 10:15:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 166. [2020-09-21 10:15:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-21 10:15:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 196 transitions. [2020-09-21 10:15:02,291 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 196 transitions. Word has length 59 [2020-09-21 10:15:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:02,292 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 196 transitions. [2020-09-21 10:15:02,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:15:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 196 transitions. [2020-09-21 10:15:02,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 10:15:02,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:02,297 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] [2020-09-21 10:15:02,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:15:02,298 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:02,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2102602730, now seen corresponding path program 1 times [2020-09-21 10:15:02,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:02,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52002521] [2020-09-21 10:15:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,654 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:02,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:15:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:15:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:15:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:02,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52002521] [2020-09-21 10:15:02,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:02,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:15:02,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581051676] [2020-09-21 10:15:02,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:15:02,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:15:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:15:02,740 INFO L87 Difference]: Start difference. First operand 166 states and 196 transitions. Second operand 5 states. [2020-09-21 10:15:03,283 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:04,496 INFO L93 Difference]: Finished difference Result 301 states and 369 transitions. [2020-09-21 10:15:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:15:04,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-09-21 10:15:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:04,501 INFO L225 Difference]: With dead ends: 301 [2020-09-21 10:15:04,501 INFO L226 Difference]: Without dead ends: 191 [2020-09-21 10:15:04,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:15:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-21 10:15:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 157. [2020-09-21 10:15:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-21 10:15:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2020-09-21 10:15:04,569 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 60 [2020-09-21 10:15:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:04,570 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2020-09-21 10:15:04,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:15:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2020-09-21 10:15:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:15:04,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:04,579 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] [2020-09-21 10:15:04,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:15:04,579 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:04,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1388581610, now seen corresponding path program 1 times [2020-09-21 10:15:04,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:04,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887616749] [2020-09-21 10:15:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,019 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:05,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:15:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 10:15:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 10:15:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:05,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887616749] [2020-09-21 10:15:05,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:05,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:15:05,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253654942] [2020-09-21 10:15:05,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:15:05,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:05,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:15:05,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:15:05,217 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand 9 states. [2020-09-21 10:15:05,689 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:06,089 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:06,427 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:06,710 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:07,781 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:10,280 INFO L93 Difference]: Finished difference Result 524 states and 649 transitions. [2020-09-21 10:15:10,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:15:10,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-09-21 10:15:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:10,289 INFO L225 Difference]: With dead ends: 524 [2020-09-21 10:15:10,289 INFO L226 Difference]: Without dead ends: 395 [2020-09-21 10:15:10,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:15:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-09-21 10:15:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 330. [2020-09-21 10:15:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-21 10:15:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 400 transitions. [2020-09-21 10:15:10,417 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 400 transitions. Word has length 65 [2020-09-21 10:15:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:10,418 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 400 transitions. [2020-09-21 10:15:10,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:15:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 400 transitions. [2020-09-21 10:15:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 10:15:10,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:10,420 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] [2020-09-21 10:15:10,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:15:10,421 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:10,421 INFO L82 PathProgramCache]: Analyzing trace with hash -262157671, now seen corresponding path program 1 times [2020-09-21 10:15:10,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:10,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34306846] [2020-09-21 10:15:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,790 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:10,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:15:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:15:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:15:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:15:10,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34306846] [2020-09-21 10:15:10,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:10,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:15:10,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521165509] [2020-09-21 10:15:10,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:15:10,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:15:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:15:10,927 INFO L87 Difference]: Start difference. First operand 330 states and 400 transitions. Second operand 9 states. [2020-09-21 10:15:11,400 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:12,292 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:13,395 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:13,810 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:14,189 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:14,519 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:15,739 INFO L93 Difference]: Finished difference Result 843 states and 1098 transitions. [2020-09-21 10:15:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:15:15,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-09-21 10:15:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:15,746 INFO L225 Difference]: With dead ends: 843 [2020-09-21 10:15:15,746 INFO L226 Difference]: Without dead ends: 541 [2020-09-21 10:15:15,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:15:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-09-21 10:15:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 473. [2020-09-21 10:15:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-09-21 10:15:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 569 transitions. [2020-09-21 10:15:15,876 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 569 transitions. Word has length 70 [2020-09-21 10:15:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:15,877 INFO L479 AbstractCegarLoop]: Abstraction has 473 states and 569 transitions. [2020-09-21 10:15:15,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:15:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 569 transitions. [2020-09-21 10:15:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-21 10:15:15,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:15,879 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, 1] [2020-09-21 10:15:15,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:15:15,879 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1621424268, now seen corresponding path program 1 times [2020-09-21 10:15:15,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:15,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880239189] [2020-09-21 10:15:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,214 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:16,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:15:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:15:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:15:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:15:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:16,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880239189] [2020-09-21 10:15:16,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:16,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:15:16,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400183094] [2020-09-21 10:15:16,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:15:16,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:16,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:15:16,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:15:16,469 INFO L87 Difference]: Start difference. First operand 473 states and 569 transitions. Second operand 9 states. [2020-09-21 10:15:17,764 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:18,106 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:18,433 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:18,747 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:19,879 INFO L93 Difference]: Finished difference Result 1007 states and 1277 transitions. [2020-09-21 10:15:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:15:19,882 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 98 [2020-09-21 10:15:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:19,886 INFO L225 Difference]: With dead ends: 1007 [2020-09-21 10:15:19,886 INFO L226 Difference]: Without dead ends: 562 [2020-09-21 10:15:19,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:15:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-09-21 10:15:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 486. [2020-09-21 10:15:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-09-21 10:15:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 583 transitions. [2020-09-21 10:15:19,973 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 583 transitions. Word has length 98 [2020-09-21 10:15:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:19,974 INFO L479 AbstractCegarLoop]: Abstraction has 486 states and 583 transitions. [2020-09-21 10:15:19,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:15:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 583 transitions. [2020-09-21 10:15:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-21 10:15:19,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:19,976 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, 1] [2020-09-21 10:15:19,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:15:19,976 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:19,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:19,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1693810826, now seen corresponding path program 1 times [2020-09-21 10:15:19,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:19,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661405353] [2020-09-21 10:15:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,276 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:20,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:15:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:15:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:15:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:15:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:20,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661405353] [2020-09-21 10:15:20,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:20,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:15:20,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924974773] [2020-09-21 10:15:20,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:15:20,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:15:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:15:20,442 INFO L87 Difference]: Start difference. First operand 486 states and 583 transitions. Second operand 11 states. [2020-09-21 10:15:21,098 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:21,415 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:21,705 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:22,710 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:23,059 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:23,378 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:24,551 INFO L93 Difference]: Finished difference Result 1034 states and 1330 transitions. [2020-09-21 10:15:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:15:24,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 98 [2020-09-21 10:15:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:24,558 INFO L225 Difference]: With dead ends: 1034 [2020-09-21 10:15:24,558 INFO L226 Difference]: Without dead ends: 576 [2020-09-21 10:15:24,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:15:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-09-21 10:15:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 494. [2020-09-21 10:15:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-09-21 10:15:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 591 transitions. [2020-09-21 10:15:24,648 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 591 transitions. Word has length 98 [2020-09-21 10:15:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:24,648 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 591 transitions. [2020-09-21 10:15:24,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:15:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 591 transitions. [2020-09-21 10:15:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-21 10:15:24,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:24,651 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, 1] [2020-09-21 10:15:24,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:15:24,651 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:24,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1364045065, now seen corresponding path program 1 times [2020-09-21 10:15:24,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:24,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404645173] [2020-09-21 10:15:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,014 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:25,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:15:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:15:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:15:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:15:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:25,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404645173] [2020-09-21 10:15:25,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:25,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:15:25,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029101134] [2020-09-21 10:15:25,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:15:25,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:25,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:15:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:15:25,215 INFO L87 Difference]: Start difference. First operand 494 states and 591 transitions. Second operand 7 states. [2020-09-21 10:15:25,741 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:26,408 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:28,930 INFO L93 Difference]: Finished difference Result 1535 states and 1984 transitions. [2020-09-21 10:15:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:15:28,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-09-21 10:15:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:28,936 INFO L225 Difference]: With dead ends: 1535 [2020-09-21 10:15:28,937 INFO L226 Difference]: Without dead ends: 1069 [2020-09-21 10:15:28,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:15:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2020-09-21 10:15:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 991. [2020-09-21 10:15:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2020-09-21 10:15:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1203 transitions. [2020-09-21 10:15:29,154 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1203 transitions. Word has length 98 [2020-09-21 10:15:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:29,155 INFO L479 AbstractCegarLoop]: Abstraction has 991 states and 1203 transitions. [2020-09-21 10:15:29,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:15:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1203 transitions. [2020-09-21 10:15:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-21 10:15:29,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:29,160 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, 1, 1, 1, 1, 1] [2020-09-21 10:15:29,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:15:29,160 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:29,161 INFO L82 PathProgramCache]: Analyzing trace with hash 884836017, now seen corresponding path program 1 times [2020-09-21 10:15:29,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:29,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17007849] [2020-09-21 10:15:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,593 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:29,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:15:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-21 10:15:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:15:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:15:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:29,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17007849] [2020-09-21 10:15:29,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:29,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-21 10:15:29,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840677845] [2020-09-21 10:15:29,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:15:29,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:29,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:15:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:15:29,807 INFO L87 Difference]: Start difference. First operand 991 states and 1203 transitions. Second operand 12 states. [2020-09-21 10:15:30,375 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:31,148 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:31,966 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:32,358 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:32,661 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:33,011 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:33,341 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:35,779 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:36,158 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:36,864 INFO L93 Difference]: Finished difference Result 2813 states and 3636 transitions. [2020-09-21 10:15:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 10:15:36,865 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 102 [2020-09-21 10:15:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:36,881 INFO L225 Difference]: With dead ends: 2813 [2020-09-21 10:15:36,881 INFO L226 Difference]: Without dead ends: 2052 [2020-09-21 10:15:36,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:15:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-21 10:15:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1740. [2020-09-21 10:15:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1740 states. [2020-09-21 10:15:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2094 transitions. [2020-09-21 10:15:37,274 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2094 transitions. Word has length 102 [2020-09-21 10:15:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:37,280 INFO L479 AbstractCegarLoop]: Abstraction has 1740 states and 2094 transitions. [2020-09-21 10:15:37,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:15:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2094 transitions. [2020-09-21 10:15:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-21 10:15:37,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:37,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-21 10:15:37,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:15:37,288 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1627137653, now seen corresponding path program 1 times [2020-09-21 10:15:37,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:37,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858348822] [2020-09-21 10:15:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,751 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:37,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:15:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:15:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:15:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-21 10:15:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-21 10:15:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-21 10:15:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:15:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-09-21 10:15:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-21 10:15:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:15:38,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858348822] [2020-09-21 10:15:38,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:15:38,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:15:38,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154682875] [2020-09-21 10:15:38,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:15:38,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:15:38,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:15:38,092 INFO L87 Difference]: Start difference. First operand 1740 states and 2094 transitions. Second operand 16 states. [2020-09-21 10:15:38,852 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:39,240 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:15:39,586 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:15:39,914 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:15:40,716 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:41,083 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:41,541 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:41,909 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:43,320 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:44,196 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:44,574 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:44,980 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:45,633 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:46,132 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:47,069 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:47,409 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:48,133 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:49,143 INFO L93 Difference]: Finished difference Result 3741 states and 4632 transitions. [2020-09-21 10:15:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-21 10:15:49,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 180 [2020-09-21 10:15:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:49,157 INFO L225 Difference]: With dead ends: 3741 [2020-09-21 10:15:49,157 INFO L226 Difference]: Without dead ends: 2219 [2020-09-21 10:15:49,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=589, Invalid=2167, Unknown=0, NotChecked=0, Total=2756 [2020-09-21 10:15:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-09-21 10:15:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2027. [2020-09-21 10:15:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-09-21 10:15:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2384 transitions. [2020-09-21 10:15:49,559 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2384 transitions. Word has length 180 [2020-09-21 10:15:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:49,560 INFO L479 AbstractCegarLoop]: Abstraction has 2027 states and 2384 transitions. [2020-09-21 10:15:49,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:15:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2384 transitions. [2020-09-21 10:15:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-21 10:15:49,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:49,571 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-09-21 10:15:49,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:15:49,572 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash 357529335, now seen corresponding path program 1 times [2020-09-21 10:15:49,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:49,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090598122] [2020-09-21 10:15:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:49,998 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:49,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:15:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:15:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:15:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-21 10:15:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:15:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:15:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 10:15:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-21 10:15:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:15:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:15:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:15:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-09-21 10:15:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-09-21 10:15:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-09-21 10:15:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-09-21 10:15:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 83 proven. 29 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-09-21 10:15:50,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090598122] [2020-09-21 10:15:50,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:15:50,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:15:50,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474774702] [2020-09-21 10:15:50,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:15:50,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:50,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:15:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:15:50,654 INFO L87 Difference]: Start difference. First operand 2027 states and 2384 transitions. Second operand 15 states. [2020-09-21 10:15:52,402 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:52,703 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:53,020 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:53,350 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 189