/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:26:56,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:26:56,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:26:56,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:26:56,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:26:56,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:26:56,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:26:56,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:26:56,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:26:56,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:26:56,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:26:56,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:26:56,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:26:56,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:26:56,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:26:56,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:26:56,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:26:56,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:26:56,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:26:56,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:26:56,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:26:56,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:26:56,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:26:56,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:26:56,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:26:56,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:26:56,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:26:56,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:26:56,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:26:56,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:26:56,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:26:56,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:26:56,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:26:56,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:26:56,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:26:56,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:26:56,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:26:56,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:26:56,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:26:56,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:26:56,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:26:56,343 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 [2020-08-21 20:26:56,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:26:56,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:26:56,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:26:56,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:26:56,385 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:26:56,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:26:56,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:26:56,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:26:56,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:26:56,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:26:56,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:26:56,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:26:56,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:26:56,388 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:26:56,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:26:56,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:26:56,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:26:56,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:26:56,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:26:56,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:26:56,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:26:56,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:26:56,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:26:56,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:26:56,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:26:56,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:26:56,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:26:56,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:26:56,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:26:56,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:26:56,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:26:56,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:26:56,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:26:56,715 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:26:56,716 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:26:56,716 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c [2020-08-21 20:26:56,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3116277a2/10f559ad668c4281bf9a4c8eca2d23e8/FLAG8ad51a194 [2020-08-21 20:26:57,289 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:26:57,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c [2020-08-21 20:26:57,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3116277a2/10f559ad668c4281bf9a4c8eca2d23e8/FLAG8ad51a194 [2020-08-21 20:26:57,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3116277a2/10f559ad668c4281bf9a4c8eca2d23e8 [2020-08-21 20:26:57,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:26:57,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:26:57,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:26:57,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:26:57,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:26:57,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:26:57" (1/1) ... [2020-08-21 20:26:57,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e399bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:57, skipping insertion in model container [2020-08-21 20:26:57,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:26:57" (1/1) ... [2020-08-21 20:26:57,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:26:57,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:26:58,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:26:58,238 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:26:58,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:26:58,385 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:26:58,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58 WrapperNode [2020-08-21 20:26:58,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:26:58,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:26:58,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:26:58,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:26:58,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (1/1) ... [2020-08-21 20:26:58,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (1/1) ... [2020-08-21 20:26:58,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (1/1) ... [2020-08-21 20:26:58,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (1/1) ... [2020-08-21 20:26:58,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (1/1) ... [2020-08-21 20:26:58,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (1/1) ... [2020-08-21 20:26:58,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (1/1) ... [2020-08-21 20:26:58,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:26:58,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:26:58,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:26:58,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:26:58,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:26:58,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:26:58,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:26:58,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 20:26:58,543 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 20:26:58,543 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 20:26:58,543 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 20:26:58,543 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 20:26:58,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:26:58,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 20:26:58,543 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 20:26:58,544 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2020-08-21 20:26:58,544 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__highWaterSensor [2020-08-21 20:26:58,544 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2020-08-21 20:26:58,544 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__lowWaterSensor [2020-08-21 20:26:58,544 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2020-08-21 20:26:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__methaneAlarm [2020-08-21 20:26:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 20:26:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2020-08-21 20:26:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__role__methaneQuery [2020-08-21 20:26:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 20:26:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 20:26:58,545 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 20:26:58,546 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 20:26:58,546 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 20:26:58,546 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 20:26:58,546 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 20:26:58,546 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 20:26:58,546 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 20:26:58,547 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 20:26:58,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 20:26:58,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 20:26:58,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 20:26:58,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 20:26:58,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 20:26:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 20:26:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 20:26:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 20:26:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 20:26:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 20:26:58,548 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 20:26:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 20:26:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 20:26:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 20:26:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 20:26:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 20:26:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 20:26:58,549 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 20:26:58,550 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 20:26:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:26:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:26:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 20:26:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 20:26:58,550 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 20:26:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 20:26:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 20:26:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 20:26:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 20:26:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 20:26:58,551 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 20:26:58,560 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 20:26:58,560 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 20:26:58,560 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 20:26:58,560 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 20:26:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:26:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 20:26:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 20:26:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 20:26:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 20:26:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 20:26:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 20:26:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 20:26:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 20:26:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 20:26:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 20:26:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 20:26:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 20:26:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 20:26:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 20:26:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2020-08-21 20:26:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 20:26:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__highWaterSensor [2020-08-21 20:26:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__lowWaterSensor [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__methaneAlarm [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__role__methaneQuery [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:26:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:26:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 20:26:58,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:26:59,696 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:26:59,698 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 20:26:59,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:26:59 BoogieIcfgContainer [2020-08-21 20:26:59,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:26:59,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:26:59,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:26:59,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:26:59,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:26:57" (1/3) ... [2020-08-21 20:26:59,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565acf2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:26:59, skipping insertion in model container [2020-08-21 20:26:59,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:26:58" (2/3) ... [2020-08-21 20:26:59,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565acf2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:26:59, skipping insertion in model container [2020-08-21 20:26:59,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:26:59" (3/3) ... [2020-08-21 20:26:59,718 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_productSimulator.cil.c [2020-08-21 20:26:59,729 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:26:59,741 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:26:59,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:26:59,778 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:26:59,779 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:26:59,779 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:26:59,779 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:26:59,780 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:26:59,780 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:26:59,780 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:26:59,780 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:26:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states. [2020-08-21 20:26:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 20:26:59,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:26:59,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:26:59,819 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:26:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:26:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash 88276295, now seen corresponding path program 1 times [2020-08-21 20:26:59,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:26:59,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646190192] [2020-08-21 20:26:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:27:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,641 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 20:27:00,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:27:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:27:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:27:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:27:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 20:27:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:27:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 20:27:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 20:27:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:27:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 20:27:00,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646190192] [2020-08-21 20:27:00,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:27:00,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:27:00,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108298983] [2020-08-21 20:27:00,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:27:00,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:27:00,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:27:00,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:27:00,906 INFO L87 Difference]: Start difference. First operand 245 states. Second operand 5 states. [2020-08-21 20:27:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:27:03,390 INFO L93 Difference]: Finished difference Result 442 states and 581 transitions. [2020-08-21 20:27:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 20:27:03,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-08-21 20:27:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:27:03,410 INFO L225 Difference]: With dead ends: 442 [2020-08-21 20:27:03,410 INFO L226 Difference]: Without dead ends: 251 [2020-08-21 20:27:03,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:27:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-08-21 20:27:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 202. [2020-08-21 20:27:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-21 20:27:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 247 transitions. [2020-08-21 20:27:03,537 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 247 transitions. Word has length 78 [2020-08-21 20:27:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:27:03,538 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 247 transitions. [2020-08-21 20:27:03,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:27:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 247 transitions. [2020-08-21 20:27:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 20:27:03,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:27:03,544 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:27:03,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:27:03,544 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:27:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:27:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash 128874418, now seen corresponding path program 1 times [2020-08-21 20:27:03,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:27:03,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146002973] [2020-08-21 20:27:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:27:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,054 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 20:27:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:27:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:27:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:27:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:27:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 20:27:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:27:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 20:27:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 20:27:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 20:27:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 20:27:04,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146002973] [2020-08-21 20:27:04,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:27:04,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:27:04,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676026420] [2020-08-21 20:27:04,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:27:04,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:27:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:27:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:27:04,193 INFO L87 Difference]: Start difference. First operand 202 states and 247 transitions. Second operand 6 states. [2020-08-21 20:27:04,958 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-21 20:27:06,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:27:06,807 INFO L93 Difference]: Finished difference Result 366 states and 459 transitions. [2020-08-21 20:27:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:27:06,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-08-21 20:27:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:27:06,813 INFO L225 Difference]: With dead ends: 366 [2020-08-21 20:27:06,814 INFO L226 Difference]: Without dead ends: 235 [2020-08-21 20:27:06,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:27:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-21 20:27:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2020-08-21 20:27:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-08-21 20:27:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2020-08-21 20:27:06,871 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 79 [2020-08-21 20:27:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:27:06,871 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2020-08-21 20:27:06,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:27:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2020-08-21 20:27:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:27:06,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:27:06,874 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:27:06,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:27:06,875 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:27:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:27:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2075074883, now seen corresponding path program 1 times [2020-08-21 20:27:06,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:27:06,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893651236] [2020-08-21 20:27:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:27:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,353 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 20:27:07,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:27:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:27:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:27:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:27:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 20:27:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:27:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 20:27:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:27:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 20:27:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 20:27:07,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893651236] [2020-08-21 20:27:07,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:27:07,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 20:27:07,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442893654] [2020-08-21 20:27:07,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:27:07,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:27:07,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:27:07,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:27:07,615 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand 12 states. [2020-08-21 20:27:08,241 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 20:27:08,967 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 211 [2020-08-21 20:27:09,882 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-21 20:27:11,026 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 20:27:11,460 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-08-21 20:27:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:27:15,484 INFO L93 Difference]: Finished difference Result 628 states and 796 transitions. [2020-08-21 20:27:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 20:27:15,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-08-21 20:27:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:27:15,495 INFO L225 Difference]: With dead ends: 628 [2020-08-21 20:27:15,495 INFO L226 Difference]: Without dead ends: 476 [2020-08-21 20:27:15,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-08-21 20:27:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-08-21 20:27:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 385. [2020-08-21 20:27:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-08-21 20:27:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 480 transitions. [2020-08-21 20:27:15,648 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 480 transitions. Word has length 84 [2020-08-21 20:27:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:27:15,649 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 480 transitions. [2020-08-21 20:27:15,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:27:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 480 transitions. [2020-08-21 20:27:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-21 20:27:15,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:27:15,652 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:27:15,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:27:15,652 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:27:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:27:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1129127896, now seen corresponding path program 1 times [2020-08-21 20:27:15,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:27:15,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842681922] [2020-08-21 20:27:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:27:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,170 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 20:27:16,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:27:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:27:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:27:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:27:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 20:27:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:27:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 20:27:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 20:27:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 20:27:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 20:27:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 20:27:16,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842681922] [2020-08-21 20:27:16,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:27:16,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-21 20:27:16,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253074768] [2020-08-21 20:27:16,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 20:27:16,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:27:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 20:27:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-08-21 20:27:16,376 INFO L87 Difference]: Start difference. First operand 385 states and 480 transitions. Second operand 16 states. [2020-08-21 20:27:17,259 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 20:27:18,042 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 211 [2020-08-21 20:27:19,014 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-21 20:27:19,895 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-08-21 20:27:20,855 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 20:27:22,016 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-21 20:27:22,916 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-08-21 20:27:23,748 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-08-21 20:27:24,120 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-08-21 20:27:24,509 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-08-21 20:27:25,039 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-08-21 20:27:25,518 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-08-21 20:27:26,070 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-08-21 20:27:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:27:31,047 INFO L93 Difference]: Finished difference Result 1582 states and 2206 transitions. [2020-08-21 20:27:31,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 20:27:31,048 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-08-21 20:27:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:27:31,060 INFO L225 Difference]: With dead ends: 1582 [2020-08-21 20:27:31,060 INFO L226 Difference]: Without dead ends: 1238 [2020-08-21 20:27:31,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 20:27:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2020-08-21 20:27:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1109. [2020-08-21 20:27:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-08-21 20:27:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1462 transitions. [2020-08-21 20:27:31,402 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1462 transitions. Word has length 90 [2020-08-21 20:27:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:27:31,403 INFO L479 AbstractCegarLoop]: Abstraction has 1109 states and 1462 transitions. [2020-08-21 20:27:31,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 20:27:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1462 transitions. [2020-08-21 20:27:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 20:27:31,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:27:31,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:27:31,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:27:31,411 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:27:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:27:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1905240978, now seen corresponding path program 1 times [2020-08-21 20:27:31,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:27:31,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901606951] [2020-08-21 20:27:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:27:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,777 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 20:27:31,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:27:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:27:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:27:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:27:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 20:27:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:27:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 20:27:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 20:27:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 20:27:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 20:27:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 20:27:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 20:27:31,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901606951] [2020-08-21 20:27:31,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:27:31,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 20:27:31,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95872008] [2020-08-21 20:27:31,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:27:31,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:27:31,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:27:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:27:31,945 INFO L87 Difference]: Start difference. First operand 1109 states and 1462 transitions. Second operand 8 states. [2020-08-21 20:27:32,397 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 20:27:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:27:36,304 INFO L93 Difference]: Finished difference Result 2674 states and 3837 transitions. [2020-08-21 20:27:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 20:27:36,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-08-21 20:27:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:27:36,319 INFO L225 Difference]: With dead ends: 2674 [2020-08-21 20:27:36,319 INFO L226 Difference]: Without dead ends: 1606 [2020-08-21 20:27:36,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-21 20:27:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2020-08-21 20:27:36,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1507. [2020-08-21 20:27:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2020-08-21 20:27:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2004 transitions. [2020-08-21 20:27:36,656 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2004 transitions. Word has length 94 [2020-08-21 20:27:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:27:36,657 INFO L479 AbstractCegarLoop]: Abstraction has 1507 states and 2004 transitions. [2020-08-21 20:27:36,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:27:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2004 transitions. [2020-08-21 20:27:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-21 20:27:36,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:27:36,662 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-08-21 20:27:36,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:27:36,662 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:27:36,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:27:36,663 INFO L82 PathProgramCache]: Analyzing trace with hash -509299228, now seen corresponding path program 1 times [2020-08-21 20:27:36,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:27:36,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21874043] [2020-08-21 20:27:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:27:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,074 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 20:27:37,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:27:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:27:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:27:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:27:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 20:27:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:27:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 20:27:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 20:27:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:27:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 20:27:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:27:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 20:27:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-21 20:27:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 20:27:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-08-21 20:27:37,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21874043] [2020-08-21 20:27:37,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:27:37,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:27:37,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685400075] [2020-08-21 20:27:37,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:27:37,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:27:37,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:27:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:27:37,311 INFO L87 Difference]: Start difference. First operand 1507 states and 2004 transitions. Second operand 12 states. [2020-08-21 20:27:38,169 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 210 [2020-08-21 20:27:39,222 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 20:27:42,989 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 20:27:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:27:47,298 INFO L93 Difference]: Finished difference Result 2888 states and 4054 transitions. [2020-08-21 20:27:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 20:27:47,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2020-08-21 20:27:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:27:47,315 INFO L225 Difference]: With dead ends: 2888 [2020-08-21 20:27:47,315 INFO L226 Difference]: Without dead ends: 1787 [2020-08-21 20:27:47,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 20:27:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2020-08-21 20:27:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1658. [2020-08-21 20:27:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2020-08-21 20:27:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2197 transitions. [2020-08-21 20:27:47,762 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2197 transitions. Word has length 122 [2020-08-21 20:27:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:27:47,765 INFO L479 AbstractCegarLoop]: Abstraction has 1658 states and 2197 transitions. [2020-08-21 20:27:47,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:27:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2197 transitions. [2020-08-21 20:27:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-21 20:27:47,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:27:47,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:27:47,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:27:47,775 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:27:47,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:27:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1658452204, now seen corresponding path program 1 times [2020-08-21 20:27:47,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:27:47,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169855823] [2020-08-21 20:27:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:27:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,229 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 20:27:48,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:27:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:27:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:27:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:27:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 20:27:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:27:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 20:27:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 20:27:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:27:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:27:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 20:27:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 20:27:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 20:27:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-21 20:27:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-21 20:27:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-08-21 20:27:48,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169855823] [2020-08-21 20:27:48,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:27:48,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:27:48,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393949127] [2020-08-21 20:27:48,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:27:48,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:27:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:27:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:27:48,519 INFO L87 Difference]: Start difference. First operand 1658 states and 2197 transitions. Second operand 12 states. [2020-08-21 20:27:50,564 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-08-21 20:27:50,951 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-08-21 20:27:51,293 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-21 20:27:51,636 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-21 20:27:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:27:53,827 INFO L93 Difference]: Finished difference Result 3445 states and 4958 transitions. [2020-08-21 20:27:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 20:27:53,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2020-08-21 20:27:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:27:53,841 INFO L225 Difference]: With dead ends: 3445 [2020-08-21 20:27:53,842 INFO L226 Difference]: Without dead ends: 1828 [2020-08-21 20:27:53,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2020-08-21 20:27:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-08-21 20:27:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1688. [2020-08-21 20:27:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-08-21 20:27:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2231 transitions. [2020-08-21 20:27:54,273 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2231 transitions. Word has length 166 [2020-08-21 20:27:54,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:27:54,273 INFO L479 AbstractCegarLoop]: Abstraction has 1688 states and 2231 transitions. [2020-08-21 20:27:54,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:27:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2231 transitions. [2020-08-21 20:27:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-08-21 20:27:54,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:27:54,280 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:27:54,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:27:54,280 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:27:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:27:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash 47025257, now seen corresponding path program 1 times [2020-08-21 20:27:54,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:27:54,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647533414] [2020-08-21 20:27:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:27:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,758 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-21 20:27:54,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:27:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:27:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:27:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 20:27:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:27:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 20:27:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:27:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 20:27:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 20:27:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 20:27:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:27:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:27:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:27:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 20:27:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-21 20:27:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-21 20:27:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:54,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:27:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:55,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-21 20:27:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-08-21 20:27:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:27:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-21 20:27:55,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647533414] [2020-08-21 20:27:55,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:27:55,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:27:55,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068627774] [2020-08-21 20:27:55,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:27:55,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:27:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:27:55,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:27:55,083 INFO L87 Difference]: Start difference. First operand 1688 states and 2231 transitions. Second operand 10 states. [2020-08-21 20:27:56,008 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-21 20:27:57,217 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 211