/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_spec2_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 10:20:18,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 10:20:18,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 10:20:18,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 10:20:18,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 10:20:18,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 10:20:18,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 10:20:18,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 10:20:18,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 10:20:18,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 10:20:18,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 10:20:18,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 10:20:18,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 10:20:18,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 10:20:18,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 10:20:18,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 10:20:18,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 10:20:18,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 10:20:18,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 10:20:18,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 10:20:18,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 10:20:18,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 10:20:18,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 10:20:18,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 10:20:18,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 10:20:18,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 10:20:18,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 10:20:18,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 10:20:18,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 10:20:18,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 10:20:18,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 10:20:18,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 10:20:18,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 10:20:18,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 10:20:18,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 10:20:18,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 10:20:18,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 10:20:18,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 10:20:18,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 10:20:18,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 10:20:18,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 10:20:18,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 10:20:18,361 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 10:20:18,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 10:20:18,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 10:20:18,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 10:20:18,363 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 10:20:18,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 10:20:18,364 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 10:20:18,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 10:20:18,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 10:20:18,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 10:20:18,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 10:20:18,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 10:20:18,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 10:20:18,365 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 10:20:18,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 10:20:18,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 10:20:18,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 10:20:18,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 10:20:18,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 10:20:18,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 10:20:18,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 10:20:18,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:20:18,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 10:20:18,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 10:20:18,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 10:20:18,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 10:20:18,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 10:20:18,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 10:20:18,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 10:20:18,372 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 [2020-08-18 10:20:18,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 10:20:18,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 10:20:18,690 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 10:20:18,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 10:20:18,692 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 10:20:18,693 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product40.cil.c [2020-08-18 10:20:18,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59bfc92e8/4b61b7706cba4023b1d9d5f6f3d08728/FLAGdc538c7dd [2020-08-18 10:20:19,260 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 10:20:19,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product40.cil.c [2020-08-18 10:20:19,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59bfc92e8/4b61b7706cba4023b1d9d5f6f3d08728/FLAGdc538c7dd [2020-08-18 10:20:19,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/59bfc92e8/4b61b7706cba4023b1d9d5f6f3d08728 [2020-08-18 10:20:19,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 10:20:19,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 10:20:19,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 10:20:19,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 10:20:19,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 10:20:19,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:20:19" (1/1) ... [2020-08-18 10:20:19,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54116fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:19, skipping insertion in model container [2020-08-18 10:20:19,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:20:19" (1/1) ... [2020-08-18 10:20:19,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 10:20:19,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 10:20:20,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:20:20,080 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 10:20:20,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:20:20,236 INFO L208 MainTranslator]: Completed translation [2020-08-18 10:20:20,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20 WrapperNode [2020-08-18 10:20:20,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 10:20:20,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 10:20:20,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 10:20:20,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 10:20:20,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (1/1) ... [2020-08-18 10:20:20,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (1/1) ... [2020-08-18 10:20:20,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (1/1) ... [2020-08-18 10:20:20,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (1/1) ... [2020-08-18 10:20:20,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (1/1) ... [2020-08-18 10:20:20,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (1/1) ... [2020-08-18 10:20:20,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (1/1) ... [2020-08-18 10:20:20,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 10:20:20,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 10:20:20,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 10:20:20,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 10:20:20,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:20:20,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 10:20:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 10:20:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 10:20:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-08-18 10:20:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-08-18 10:20:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 10:20:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 10:20:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 10:20:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 10:20:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 10:20:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 10:20:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 10:20:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 10:20:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 10:20:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 10:20:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 10:20:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 10:20:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 10:20:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 10:20:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 10:20:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 10:20:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 10:20:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 10:20:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 10:20:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 10:20:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 10:20:20,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 10:20:20,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 10:20:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 10:20:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 10:20:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 10:20:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 10:20:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 10:20:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 10:20:20,417 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 10:20:20,417 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 10:20:20,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 10:20:20,417 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 10:20:20,417 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 10:20:20,418 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 10:20:20,418 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 10:20:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 10:20:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 10:20:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 10:20:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 10:20:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 10:20:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 10:20:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-08-18 10:20:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-08-18 10:20:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 10:20:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 10:20:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 10:20:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 10:20:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 10:20:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 10:20:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 10:20:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 10:20:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 10:20:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 10:20:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 10:20:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 10:20:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 10:20:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 10:20:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 10:20:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 10:20:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 10:20:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 10:20:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 10:20:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 10:20:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 10:20:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 10:20:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 10:20:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 10:20:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 10:20:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 10:20:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 10:20:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 10:20:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 10:20:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 10:20:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 10:20:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 10:20:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 10:20:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 10:20:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 10:20:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 10:20:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 10:20:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 10:20:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 10:20:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 10:20:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 10:20:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 10:20:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 10:20:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 10:20:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 10:20:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 10:20:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 10:20:21,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 10:20:21,481 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 10:20:21,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:20:21 BoogieIcfgContainer [2020-08-18 10:20:21,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 10:20:21,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 10:20:21,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 10:20:21,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 10:20:21,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:20:19" (1/3) ... [2020-08-18 10:20:21,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c32a3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:20:21, skipping insertion in model container [2020-08-18 10:20:21,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:20:20" (2/3) ... [2020-08-18 10:20:21,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c32a3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:20:21, skipping insertion in model container [2020-08-18 10:20:21,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:20:21" (3/3) ... [2020-08-18 10:20:21,502 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product40.cil.c [2020-08-18 10:20:21,511 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 10:20:21,518 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 10:20:21,531 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 10:20:21,555 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 10:20:21,556 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 10:20:21,556 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 10:20:21,556 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 10:20:21,556 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 10:20:21,556 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 10:20:21,557 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 10:20:21,557 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 10:20:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-08-18 10:20:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 10:20:21,588 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:21,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:21,590 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:21,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1292486909, now seen corresponding path program 1 times [2020-08-18 10:20:21,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:21,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514692203] [2020-08-18 10:20:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,326 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:22,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 10:20:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 10:20:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:22,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514692203] [2020-08-18 10:20:22,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:22,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:20:22,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328920098] [2020-08-18 10:20:22,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:20:22,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:20:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:20:22,464 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 4 states. [2020-08-18 10:20:23,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:23,492 INFO L93 Difference]: Finished difference Result 311 states and 408 transitions. [2020-08-18 10:20:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 10:20:23,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-18 10:20:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:23,508 INFO L225 Difference]: With dead ends: 311 [2020-08-18 10:20:23,509 INFO L226 Difference]: Without dead ends: 174 [2020-08-18 10:20:23,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:20:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-18 10:20:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 138. [2020-08-18 10:20:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 10:20:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2020-08-18 10:20:23,604 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 51 [2020-08-18 10:20:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:23,604 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2020-08-18 10:20:23,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:20:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2020-08-18 10:20:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 10:20:23,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:23,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:23,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 10:20:23,609 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash -11798802, now seen corresponding path program 1 times [2020-08-18 10:20:23,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:23,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189307178] [2020-08-18 10:20:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,918 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:23,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 10:20:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 10:20:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:23,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189307178] [2020-08-18 10:20:23,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:23,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 10:20:23,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264997833] [2020-08-18 10:20:23,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:20:23,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:20:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:20:23,972 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand 5 states. [2020-08-18 10:20:24,375 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:25,338 INFO L93 Difference]: Finished difference Result 246 states and 307 transitions. [2020-08-18 10:20:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 10:20:25,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-18 10:20:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:25,343 INFO L225 Difference]: With dead ends: 246 [2020-08-18 10:20:25,343 INFO L226 Difference]: Without dead ends: 164 [2020-08-18 10:20:25,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 10:20:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-08-18 10:20:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 129. [2020-08-18 10:20:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-18 10:20:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 151 transitions. [2020-08-18 10:20:25,397 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 151 transitions. Word has length 52 [2020-08-18 10:20:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:25,397 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 151 transitions. [2020-08-18 10:20:25,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 10:20:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 151 transitions. [2020-08-18 10:20:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 10:20:25,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:25,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:25,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 10:20:25,400 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:25,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1490469892, now seen corresponding path program 1 times [2020-08-18 10:20:25,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:25,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428277070] [2020-08-18 10:20:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,741 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:25,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 10:20:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 10:20:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:25,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428277070] [2020-08-18 10:20:25,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:25,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 10:20:25,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921361803] [2020-08-18 10:20:25,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 10:20:25,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:25,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 10:20:25,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 10:20:25,824 INFO L87 Difference]: Start difference. First operand 129 states and 151 transitions. Second operand 9 states. [2020-08-18 10:20:26,173 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:26,472 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:26,755 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:26,978 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:27,734 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:29,565 INFO L93 Difference]: Finished difference Result 439 states and 556 transitions. [2020-08-18 10:20:29,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 10:20:29,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-08-18 10:20:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:29,573 INFO L225 Difference]: With dead ends: 439 [2020-08-18 10:20:29,573 INFO L226 Difference]: Without dead ends: 338 [2020-08-18 10:20:29,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-08-18 10:20:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-08-18 10:20:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 269. [2020-08-18 10:20:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-08-18 10:20:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 328 transitions. [2020-08-18 10:20:29,646 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 328 transitions. Word has length 57 [2020-08-18 10:20:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:29,646 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 328 transitions. [2020-08-18 10:20:29,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 10:20:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 328 transitions. [2020-08-18 10:20:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 10:20:29,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:29,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:29,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 10:20:29,650 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:29,650 INFO L82 PathProgramCache]: Analyzing trace with hash -512554003, now seen corresponding path program 1 times [2020-08-18 10:20:29,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:29,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209885540] [2020-08-18 10:20:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:29,932 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:29,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:29,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:29,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:29,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:29,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:30,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:30,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 10:20:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:30,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 10:20:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:30,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 10:20:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:30,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209885540] [2020-08-18 10:20:30,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:30,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 10:20:30,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994666447] [2020-08-18 10:20:30,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 10:20:30,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:30,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 10:20:30,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 10:20:30,065 INFO L87 Difference]: Start difference. First operand 269 states and 328 transitions. Second operand 9 states. [2020-08-18 10:20:30,405 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:31,405 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:31,805 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:32,027 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:32,292 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:33,683 INFO L93 Difference]: Finished difference Result 864 states and 1152 transitions. [2020-08-18 10:20:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 10:20:33,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-08-18 10:20:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:33,689 INFO L225 Difference]: With dead ends: 864 [2020-08-18 10:20:33,690 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 10:20:33,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-18 10:20:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 10:20:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 486. [2020-08-18 10:20:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-08-18 10:20:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 596 transitions. [2020-08-18 10:20:33,818 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 596 transitions. Word has length 62 [2020-08-18 10:20:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:33,819 INFO L479 AbstractCegarLoop]: Abstraction has 486 states and 596 transitions. [2020-08-18 10:20:33,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 10:20:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 596 transitions. [2020-08-18 10:20:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 10:20:33,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:33,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:33,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 10:20:33,823 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1361940215, now seen corresponding path program 1 times [2020-08-18 10:20:33,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:33,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457464656] [2020-08-18 10:20:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,097 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:34,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 10:20:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 10:20:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 10:20:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 10:20:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:34,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457464656] [2020-08-18 10:20:34,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:34,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 10:20:34,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551034413] [2020-08-18 10:20:34,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 10:20:34,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 10:20:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 10:20:34,207 INFO L87 Difference]: Start difference. First operand 486 states and 596 transitions. Second operand 10 states. [2020-08-18 10:20:34,594 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:35,608 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:35,864 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:36,106 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:36,790 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:38,021 INFO L93 Difference]: Finished difference Result 1373 states and 1890 transitions. [2020-08-18 10:20:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 10:20:38,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-08-18 10:20:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:38,030 INFO L225 Difference]: With dead ends: 1373 [2020-08-18 10:20:38,031 INFO L226 Difference]: Without dead ends: 915 [2020-08-18 10:20:38,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2020-08-18 10:20:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2020-08-18 10:20:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 709. [2020-08-18 10:20:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2020-08-18 10:20:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 863 transitions. [2020-08-18 10:20:38,227 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 863 transitions. Word has length 66 [2020-08-18 10:20:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:38,227 INFO L479 AbstractCegarLoop]: Abstraction has 709 states and 863 transitions. [2020-08-18 10:20:38,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 10:20:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 863 transitions. [2020-08-18 10:20:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 10:20:38,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:38,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:38,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 10:20:38,232 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1572074791, now seen corresponding path program 1 times [2020-08-18 10:20:38,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:38,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351595349] [2020-08-18 10:20:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,538 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:38,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 10:20:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 10:20:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:20:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:20:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 10:20:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 10:20:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:38,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351595349] [2020-08-18 10:20:38,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:38,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 10:20:38,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092504770] [2020-08-18 10:20:38,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 10:20:38,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 10:20:38,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 10:20:38,736 INFO L87 Difference]: Start difference. First operand 709 states and 863 transitions. Second operand 10 states. [2020-08-18 10:20:39,054 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:40,138 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:40,381 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-18 10:20:40,648 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:40,902 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:42,598 INFO L93 Difference]: Finished difference Result 2413 states and 3450 transitions. [2020-08-18 10:20:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 10:20:42,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-18 10:20:42,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:42,618 INFO L225 Difference]: With dead ends: 2413 [2020-08-18 10:20:42,618 INFO L226 Difference]: Without dead ends: 1732 [2020-08-18 10:20:42,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-08-18 10:20:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2020-08-18 10:20:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1279. [2020-08-18 10:20:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2020-08-18 10:20:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1554 transitions. [2020-08-18 10:20:43,047 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1554 transitions. Word has length 89 [2020-08-18 10:20:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:43,048 INFO L479 AbstractCegarLoop]: Abstraction has 1279 states and 1554 transitions. [2020-08-18 10:20:43,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 10:20:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1554 transitions. [2020-08-18 10:20:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 10:20:43,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:43,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:43,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 10:20:43,053 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash -153406106, now seen corresponding path program 1 times [2020-08-18 10:20:43,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:43,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41905263] [2020-08-18 10:20:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,311 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:43,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 10:20:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 10:20:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:20:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:20:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 10:20:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 10:20:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:43,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41905263] [2020-08-18 10:20:43,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:43,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 10:20:43,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996795063] [2020-08-18 10:20:43,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 10:20:43,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 10:20:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 10:20:43,445 INFO L87 Difference]: Start difference. First operand 1279 states and 1554 transitions. Second operand 10 states. [2020-08-18 10:20:44,584 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:44,829 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-18 10:20:45,092 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:45,326 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:46,677 INFO L93 Difference]: Finished difference Result 2983 states and 3988 transitions. [2020-08-18 10:20:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 10:20:46,679 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-18 10:20:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:46,696 INFO L225 Difference]: With dead ends: 2983 [2020-08-18 10:20:46,696 INFO L226 Difference]: Without dead ends: 1732 [2020-08-18 10:20:46,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-08-18 10:20:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2020-08-18 10:20:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1319. [2020-08-18 10:20:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2020-08-18 10:20:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1594 transitions. [2020-08-18 10:20:47,039 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1594 transitions. Word has length 89 [2020-08-18 10:20:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:47,039 INFO L479 AbstractCegarLoop]: Abstraction has 1319 states and 1594 transitions. [2020-08-18 10:20:47,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 10:20:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1594 transitions. [2020-08-18 10:20:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 10:20:47,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:47,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:47,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 10:20:47,044 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 548193768, now seen corresponding path program 1 times [2020-08-18 10:20:47,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:47,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21009402] [2020-08-18 10:20:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,347 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:47,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 10:20:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 10:20:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:20:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:20:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 10:20:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 10:20:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:47,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21009402] [2020-08-18 10:20:47,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:47,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 10:20:47,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767971089] [2020-08-18 10:20:47,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 10:20:47,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:47,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 10:20:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 10:20:47,503 INFO L87 Difference]: Start difference. First operand 1319 states and 1594 transitions. Second operand 12 states. [2020-08-18 10:20:47,987 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:48,251 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:48,467 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:49,242 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:49,489 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:49,715 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:20:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:50,844 INFO L93 Difference]: Finished difference Result 2667 states and 3530 transitions. [2020-08-18 10:20:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 10:20:50,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-08-18 10:20:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:50,853 INFO L225 Difference]: With dead ends: 2667 [2020-08-18 10:20:50,854 INFO L226 Difference]: Without dead ends: 1376 [2020-08-18 10:20:50,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-18 10:20:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2020-08-18 10:20:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1087. [2020-08-18 10:20:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1087 states. [2020-08-18 10:20:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1282 transitions. [2020-08-18 10:20:51,083 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1282 transitions. Word has length 89 [2020-08-18 10:20:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:51,084 INFO L479 AbstractCegarLoop]: Abstraction has 1087 states and 1282 transitions. [2020-08-18 10:20:51,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 10:20:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1282 transitions. [2020-08-18 10:20:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 10:20:51,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:51,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:51,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 10:20:51,091 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 81932175, now seen corresponding path program 1 times [2020-08-18 10:20:51,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:51,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234934521] [2020-08-18 10:20:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,365 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:51,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 10:20:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 10:20:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 10:20:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:20:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:20:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 10:20:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 10:20:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:20:51,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234934521] [2020-08-18 10:20:51,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:20:51,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 10:20:51,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757607291] [2020-08-18 10:20:51,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 10:20:51,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:51,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 10:20:51,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 10:20:51,459 INFO L87 Difference]: Start difference. First operand 1087 states and 1282 transitions. Second operand 8 states. [2020-08-18 10:20:51,794 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:20:54,108 INFO L93 Difference]: Finished difference Result 2185 states and 2908 transitions. [2020-08-18 10:20:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 10:20:54,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-08-18 10:20:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:20:54,122 INFO L225 Difference]: With dead ends: 2185 [2020-08-18 10:20:54,122 INFO L226 Difference]: Without dead ends: 2182 [2020-08-18 10:20:54,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-08-18 10:20:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2020-08-18 10:20:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1684. [2020-08-18 10:20:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1684 states. [2020-08-18 10:20:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2013 transitions. [2020-08-18 10:20:54,477 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2013 transitions. Word has length 93 [2020-08-18 10:20:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:20:54,520 INFO L479 AbstractCegarLoop]: Abstraction has 1684 states and 2013 transitions. [2020-08-18 10:20:54,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 10:20:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2013 transitions. [2020-08-18 10:20:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 10:20:54,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:20:54,529 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:20:54,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 10:20:54,530 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:20:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:20:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash 688265763, now seen corresponding path program 1 times [2020-08-18 10:20:54,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:20:54,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005230209] [2020-08-18 10:20:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:20:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,867 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:20:54,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:20:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:20:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:20:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:20:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:20:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:20:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 10:20:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 10:20:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 10:20:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:54,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:20:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:20:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:20:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:20:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 10:20:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-18 10:20:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 10:20:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:20:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 10:20:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:20:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 10:20:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-18 10:20:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:20:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 10:20:55,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005230209] [2020-08-18 10:20:55,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:20:55,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 10:20:55,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702975857] [2020-08-18 10:20:55,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 10:20:55,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:20:55,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 10:20:55,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-18 10:20:55,164 INFO L87 Difference]: Start difference. First operand 1684 states and 2013 transitions. Second operand 19 states. [2020-08-18 10:20:55,778 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:56,089 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 10:20:56,337 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 10:20:56,567 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 10:20:57,300 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:20:57,967 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:20:58,329 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:00,666 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:00,903 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:01,152 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:01,402 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:01,658 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:01,898 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:02,163 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:02,407 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:21:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:21:03,385 INFO L93 Difference]: Finished difference Result 3638 states and 4589 transitions. [2020-08-18 10:21:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-18 10:21:03,386 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 152 [2020-08-18 10:21:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:21:03,396 INFO L225 Difference]: With dead ends: 3638 [2020-08-18 10:21:03,396 INFO L226 Difference]: Without dead ends: 1982 [2020-08-18 10:21:03,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=608, Invalid=2814, Unknown=0, NotChecked=0, Total=3422 [2020-08-18 10:21:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2020-08-18 10:21:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1630. [2020-08-18 10:21:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-08-18 10:21:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 1911 transitions. [2020-08-18 10:21:03,689 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 1911 transitions. Word has length 152 [2020-08-18 10:21:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:21:03,690 INFO L479 AbstractCegarLoop]: Abstraction has 1630 states and 1911 transitions. [2020-08-18 10:21:03,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 10:21:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 1911 transitions. [2020-08-18 10:21:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-18 10:21:03,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:21:03,696 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-08-18 10:21:03,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 10:21:03,697 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:21:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:21:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1034293868, now seen corresponding path program 1 times [2020-08-18 10:21:03,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:21:03,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384738847] [2020-08-18 10:21:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:21:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,059 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:21:04,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:21:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:21:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:21:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:21:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:21:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:21:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 10:21:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 10:21:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 10:21:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:21:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:21:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:21:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:21:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 10:21:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-18 10:21:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 10:21:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:21:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:21:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 10:21:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-18 10:21:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-18 10:21:04,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384738847] [2020-08-18 10:21:04,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:21:04,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 10:21:04,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431200681] [2020-08-18 10:21:04,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 10:21:04,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:21:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 10:21:04,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-18 10:21:04,271 INFO L87 Difference]: Start difference. First operand 1630 states and 1911 transitions. Second operand 14 states. [2020-08-18 10:21:04,751 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:21:04,989 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:21:05,205 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 10:21:05,732 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:21:07,143 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:21:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:21:08,891 INFO L93 Difference]: Finished difference Result 3066 states and 3768 transitions. [2020-08-18 10:21:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-18 10:21:08,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 156 [2020-08-18 10:21:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:21:08,901 INFO L225 Difference]: With dead ends: 3066 [2020-08-18 10:21:08,901 INFO L226 Difference]: Without dead ends: 1788 [2020-08-18 10:21:08,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 10:21:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2020-08-18 10:21:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1514. [2020-08-18 10:21:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-08-18 10:21:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1682 transitions. [2020-08-18 10:21:09,219 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1682 transitions. Word has length 156 [2020-08-18 10:21:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:21:09,220 INFO L479 AbstractCegarLoop]: Abstraction has 1514 states and 1682 transitions. [2020-08-18 10:21:09,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 10:21:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1682 transitions. [2020-08-18 10:21:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-18 10:21:09,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:21:09,225 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-08-18 10:21:09,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 10:21:09,226 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:21:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:21:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash -630512924, now seen corresponding path program 1 times [2020-08-18 10:21:09,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:21:09,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261594371] [2020-08-18 10:21:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:21:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,561 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:21:09,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:21:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:21:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:21:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:21:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:21:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 10:21:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 10:21:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 10:21:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 10:21:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:21:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:21:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:21:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:21:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 10:21:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 10:21:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:21:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-18 10:21:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:21:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:21:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:21:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 10:21:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-18 10:21:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:21:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-08-18 10:21:09,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261594371] [2020-08-18 10:21:09,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:21:09,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 10:21:09,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661209485] [2020-08-18 10:21:09,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 10:21:09,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:21:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 10:21:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 10:21:09,796 INFO L87 Difference]: Start difference. First operand 1514 states and 1682 transitions. Second operand 10 states. [2020-08-18 10:21:10,961 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:21:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:21:12,879 INFO L93 Difference]: Finished difference Result 2649 states and 3159 transitions. [2020-08-18 10:21:12,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 10:21:12,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 161 [2020-08-18 10:21:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:21:12,882 INFO L225 Difference]: With dead ends: 2649 [2020-08-18 10:21:12,882 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 10:21:12,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 10:21:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 10:21:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 10:21:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 10:21:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 10:21:12,890 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2020-08-18 10:21:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:21:12,890 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 10:21:12,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 10:21:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 10:21:12,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 10:21:12,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 10:21:12,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 10:21:13,720 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 204 [2020-08-18 10:21:13,939 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 202 [2020-08-18 10:21:14,172 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 204 [2020-08-18 10:21:14,677 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 213 [2020-08-18 10:21:14,817 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 204 [2020-08-18 10:21:15,240 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 204 [2020-08-18 10:21:15,345 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 204 [2020-08-18 10:21:15,658 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 211 [2020-08-18 10:21:15,836 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 213 [2020-08-18 10:21:16,471 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 24