/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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_spec5_product52.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:12:11,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:12:11,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:12:11,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:12:11,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:12:11,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:12:11,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:12:11,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:12:11,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:12:11,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:12:11,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:12:11,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:12:11,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:12:11,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:12:11,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:12:11,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:12:11,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:12:11,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:12:11,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:12:11,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:12:11,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:12:11,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:12:11,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:12:11,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:12:11,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:12:11,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:12:11,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:12:11,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:12:11,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:12:11,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 06:12:11,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 06:12:11,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 06:12:11,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 06:12:11,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 06:12:11,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 06:12:11,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 06:12:11,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 06:12:11,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 06:12:11,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:12:11,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:12:11,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:12:11,353 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 [2020-08-22 06:12:11,390 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:12:11,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:12:11,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:12:11,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:12:11,394 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:12:11,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:12:11,395 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:12:11,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:12:11,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:12:11,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:12:11,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:12:11,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:12:11,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:12:11,397 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:12:11,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:12:11,397 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:12:11,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:12:11,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:12:11,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:12:11,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:12:11,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:12:11,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:12:11,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:12:11,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:12:11,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:12:11,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:12:11,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:12:11,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:12:11,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:12:11,401 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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:12:11,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:12:11,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:12:11,702 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:12:11,704 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:12:11,704 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:12:11,705 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product52.cil.c [2020-08-22 06:12:11,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f78b4212/72cf90232efa45a180f1ec2ac1ad3155/FLAGe4fe5912f [2020-08-22 06:12:12,355 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:12:12,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec5_product52.cil.c [2020-08-22 06:12:12,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f78b4212/72cf90232efa45a180f1ec2ac1ad3155/FLAGe4fe5912f [2020-08-22 06:12:12,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f78b4212/72cf90232efa45a180f1ec2ac1ad3155 [2020-08-22 06:12:12,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:12:12,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:12:12,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:12:12,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:12:12,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:12:12,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:12:12" (1/1) ... [2020-08-22 06:12:12,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@415d1520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:12, skipping insertion in model container [2020-08-22 06:12:12,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:12:12" (1/1) ... [2020-08-22 06:12:12,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:12:12,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:12:13,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:12:13,163 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:12:13,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:12:13,348 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:12:13,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13 WrapperNode [2020-08-22 06:12:13,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:12:13,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:12:13,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:12:13,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:12:13,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (1/1) ... [2020-08-22 06:12:13,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (1/1) ... [2020-08-22 06:12:13,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (1/1) ... [2020-08-22 06:12:13,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (1/1) ... [2020-08-22 06:12:13,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (1/1) ... [2020-08-22 06:12:13,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (1/1) ... [2020-08-22 06:12:13,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (1/1) ... [2020-08-22 06:12:13,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:12:13,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:12:13,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:12:13,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:12:13,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (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 [2020-08-22 06:12:13,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:12:13,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:12:13,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-22 06:12:13,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-22 06:12:13,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-22 06:12:13,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-22 06:12:13,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-22 06:12:13,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-22 06:12:13,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-22 06:12:13,537 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-22 06:12:13,537 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-22 06:12:13,537 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-22 06:12:13,537 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-22 06:12:13,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:12:13,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-22 06:12:13,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2020-08-22 06:12:13,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2020-08-22 06:12:13,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2020-08-22 06:12:13,539 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-22 06:12:13,539 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-22 06:12:13,539 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-22 06:12:13,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-22 06:12:13,539 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-22 06:12:13,539 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-22 06:12:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-22 06:12:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-22 06:12:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-22 06:12:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-22 06:12:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-22 06:12:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-22 06:12:13,541 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-22 06:12:13,541 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-22 06:12:13,541 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-22 06:12:13,541 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-22 06:12:13,541 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-22 06:12:13,541 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-22 06:12:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-22 06:12:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-22 06:12:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-22 06:12:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-22 06:12:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-22 06:12:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-22 06:12:13,543 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-22 06:12:13,543 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-22 06:12:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:12:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:12:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 06:12:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-22 06:12:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 06:12:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 06:12:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-22 06:12:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 06:12:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 06:12:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 06:12:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 06:12:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-22 06:12:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 06:12:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-22 06:12:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-22 06:12:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 06:12:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-22 06:12:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-22 06:12:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 06:12:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-22 06:12:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-22 06:12:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-22 06:12:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-22 06:12:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-22 06:12:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-22 06:12:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-22 06:12:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-22 06:12:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2020-08-22 06:12:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-22 06:12:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-22 06:12:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-22 06:12:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-22 06:12:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-22 06:12:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:12:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-22 06:12:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-22 06:12:13,549 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-22 06:12:13,549 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2020-08-22 06:12:13,549 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2020-08-22 06:12:13,549 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-22 06:12:13,549 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-22 06:12:13,549 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-22 06:12:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-22 06:12:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-22 06:12:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-22 06:12:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-22 06:12:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-22 06:12:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-22 06:12:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-22 06:12:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-22 06:12:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-22 06:12:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-22 06:12:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-22 06:12:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-22 06:12:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-22 06:12:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:12:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 06:12:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:12:14,756 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:12:14,756 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 06:12:14,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:12:14 BoogieIcfgContainer [2020-08-22 06:12:14,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:12:14,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:12:14,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:12:14,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:12:14,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:12:12" (1/3) ... [2020-08-22 06:12:14,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa0b8de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:12:14, skipping insertion in model container [2020-08-22 06:12:14,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:12:13" (2/3) ... [2020-08-22 06:12:14,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa0b8de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:12:14, skipping insertion in model container [2020-08-22 06:12:14,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:12:14" (3/3) ... [2020-08-22 06:12:14,775 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product52.cil.c [2020-08-22 06:12:14,786 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:12:14,797 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:12:14,813 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:12:14,844 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:12:14,845 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:12:14,845 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:12:14,845 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:12:14,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:12:14,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:12:14,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:12:14,848 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:12:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states. [2020-08-22 06:12:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 06:12:14,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:14,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:14,897 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:14,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1089631799, now seen corresponding path program 1 times [2020-08-22 06:12:14,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:14,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948696155] [2020-08-22 06:12:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,661 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:15,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:12:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 06:12:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 06:12:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 06:12:15,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948696155] [2020-08-22 06:12:15,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:12:15,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:12:15,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521003443] [2020-08-22 06:12:15,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:12:15,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:12:15,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:12:15,817 INFO L87 Difference]: Start difference. First operand 191 states. Second operand 4 states. [2020-08-22 06:12:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:16,998 INFO L93 Difference]: Finished difference Result 328 states and 422 transitions. [2020-08-22 06:12:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:12:17,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-22 06:12:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:17,017 INFO L225 Difference]: With dead ends: 328 [2020-08-22 06:12:17,017 INFO L226 Difference]: Without dead ends: 181 [2020-08-22 06:12:17,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:12:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-08-22 06:12:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 148. [2020-08-22 06:12:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-22 06:12:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 174 transitions. [2020-08-22 06:12:17,157 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 174 transitions. Word has length 59 [2020-08-22 06:12:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:17,158 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 174 transitions. [2020-08-22 06:12:17,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:12:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 174 transitions. [2020-08-22 06:12:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 06:12:17,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:17,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:17,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:12:17,171 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:17,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:17,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1975382983, now seen corresponding path program 1 times [2020-08-22 06:12:17,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:17,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282096104] [2020-08-22 06:12:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,567 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:17,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 06:12:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 06:12:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 06:12:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 06:12:17,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282096104] [2020-08-22 06:12:17,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:12:17,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:12:17,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455581081] [2020-08-22 06:12:17,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:12:17,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:12:17,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:12:17,630 INFO L87 Difference]: Start difference. First operand 148 states and 174 transitions. Second operand 5 states. [2020-08-22 06:12:18,135 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:19,028 INFO L93 Difference]: Finished difference Result 263 states and 322 transitions. [2020-08-22 06:12:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 06:12:19,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-22 06:12:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:19,032 INFO L225 Difference]: With dead ends: 263 [2020-08-22 06:12:19,032 INFO L226 Difference]: Without dead ends: 171 [2020-08-22 06:12:19,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:12:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-08-22 06:12:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2020-08-22 06:12:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-08-22 06:12:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 162 transitions. [2020-08-22 06:12:19,077 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 162 transitions. Word has length 60 [2020-08-22 06:12:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:19,077 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 162 transitions. [2020-08-22 06:12:19,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:12:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 162 transitions. [2020-08-22 06:12:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 06:12:19,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:19,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:19,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:12:19,080 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:19,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1007889166, now seen corresponding path program 1 times [2020-08-22 06:12:19,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:19,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186050797] [2020-08-22 06:12:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,410 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:19,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:12:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 06:12:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 06:12:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 06:12:19,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186050797] [2020-08-22 06:12:19,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:12:19,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 06:12:19,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774438726] [2020-08-22 06:12:19,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:12:19,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:19,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:12:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:12:19,517 INFO L87 Difference]: Start difference. First operand 139 states and 162 transitions. Second operand 9 states. [2020-08-22 06:12:19,994 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:20,292 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:20,541 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:20,791 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:21,686 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:23,520 INFO L93 Difference]: Finished difference Result 466 states and 577 transitions. [2020-08-22 06:12:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 06:12:23,520 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 06:12:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:23,525 INFO L225 Difference]: With dead ends: 466 [2020-08-22 06:12:23,526 INFO L226 Difference]: Without dead ends: 355 [2020-08-22 06:12:23,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-08-22 06:12:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-08-22 06:12:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 294. [2020-08-22 06:12:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-08-22 06:12:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 356 transitions. [2020-08-22 06:12:23,633 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 356 transitions. Word has length 65 [2020-08-22 06:12:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:23,633 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 356 transitions. [2020-08-22 06:12:23,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:12:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 356 transitions. [2020-08-22 06:12:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 06:12:23,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:23,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:23,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:12:23,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1025318737, now seen corresponding path program 1 times [2020-08-22 06:12:23,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:23,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842118628] [2020-08-22 06:12:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:23,930 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:23,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:23,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:23,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:23,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:23,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:23,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:23,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 06:12:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:24,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 06:12:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:24,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:24,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 06:12:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:24,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 06:12:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 06:12:24,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842118628] [2020-08-22 06:12:24,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:12:24,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 06:12:24,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997081339] [2020-08-22 06:12:24,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:12:24,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:12:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:12:24,041 INFO L87 Difference]: Start difference. First operand 294 states and 356 transitions. Second operand 9 states. [2020-08-22 06:12:24,471 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:25,176 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:25,991 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:26,298 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:26,556 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:26,852 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:27,667 INFO L93 Difference]: Finished difference Result 755 states and 986 transitions. [2020-08-22 06:12:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 06:12:27,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-08-22 06:12:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:27,674 INFO L225 Difference]: With dead ends: 755 [2020-08-22 06:12:27,674 INFO L226 Difference]: Without dead ends: 489 [2020-08-22 06:12:27,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-22 06:12:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-08-22 06:12:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 421. [2020-08-22 06:12:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-08-22 06:12:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 507 transitions. [2020-08-22 06:12:27,759 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 507 transitions. Word has length 70 [2020-08-22 06:12:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:27,759 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 507 transitions. [2020-08-22 06:12:27,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:12:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 507 transitions. [2020-08-22 06:12:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 06:12:27,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:27,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:27,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:12:27,762 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2085443903, now seen corresponding path program 1 times [2020-08-22 06:12:27,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:27,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630769956] [2020-08-22 06:12:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,100 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:28,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:12:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 06:12:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:12:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 06:12:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 06:12:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 06:12:28,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630769956] [2020-08-22 06:12:28,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:12:28,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 06:12:28,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434620893] [2020-08-22 06:12:28,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:12:28,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:12:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:12:28,236 INFO L87 Difference]: Start difference. First operand 421 states and 507 transitions. Second operand 9 states. [2020-08-22 06:12:29,341 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:29,582 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-22 06:12:29,866 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:30,102 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:30,888 INFO L93 Difference]: Finished difference Result 903 states and 1149 transitions. [2020-08-22 06:12:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:12:30,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-08-22 06:12:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:30,893 INFO L225 Difference]: With dead ends: 903 [2020-08-22 06:12:30,893 INFO L226 Difference]: Without dead ends: 510 [2020-08-22 06:12:30,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:12:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-08-22 06:12:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 434. [2020-08-22 06:12:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-08-22 06:12:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 521 transitions. [2020-08-22 06:12:30,974 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 521 transitions. Word has length 93 [2020-08-22 06:12:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:30,975 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 521 transitions. [2020-08-22 06:12:30,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:12:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 521 transitions. [2020-08-22 06:12:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 06:12:30,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:30,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:30,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:12:30,978 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:30,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1383844029, now seen corresponding path program 1 times [2020-08-22 06:12:30,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:30,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649279922] [2020-08-22 06:12:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,282 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:31,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:12:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 06:12:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:12:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 06:12:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 06:12:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 06:12:31,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649279922] [2020-08-22 06:12:31,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:12:31,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 06:12:31,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226912513] [2020-08-22 06:12:31,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 06:12:31,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:31,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 06:12:31,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:12:31,447 INFO L87 Difference]: Start difference. First operand 434 states and 521 transitions. Second operand 11 states. [2020-08-22 06:12:32,004 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:32,237 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:32,466 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:33,282 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:33,559 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:33,801 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:34,675 INFO L93 Difference]: Finished difference Result 930 states and 1198 transitions. [2020-08-22 06:12:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 06:12:34,682 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-08-22 06:12:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:34,686 INFO L225 Difference]: With dead ends: 930 [2020-08-22 06:12:34,687 INFO L226 Difference]: Without dead ends: 524 [2020-08-22 06:12:34,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-22 06:12:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-08-22 06:12:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 442. [2020-08-22 06:12:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-08-22 06:12:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 529 transitions. [2020-08-22 06:12:34,789 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 529 transitions. Word has length 93 [2020-08-22 06:12:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:34,789 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 529 transitions. [2020-08-22 06:12:34,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 06:12:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 529 transitions. [2020-08-22 06:12:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 06:12:34,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:34,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:34,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:12:34,792 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash 341636868, now seen corresponding path program 1 times [2020-08-22 06:12:34,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:34,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598891375] [2020-08-22 06:12:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,065 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:35,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:12:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 06:12:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:12:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 06:12:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 06:12:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 06:12:35,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598891375] [2020-08-22 06:12:35,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:12:35,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 06:12:35,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663056397] [2020-08-22 06:12:35,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:12:35,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:12:35,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:12:35,220 INFO L87 Difference]: Start difference. First operand 442 states and 529 transitions. Second operand 7 states. [2020-08-22 06:12:35,567 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:36,095 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:38,074 INFO L93 Difference]: Finished difference Result 1411 states and 1828 transitions. [2020-08-22 06:12:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 06:12:38,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-22 06:12:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:38,084 INFO L225 Difference]: With dead ends: 1411 [2020-08-22 06:12:38,084 INFO L226 Difference]: Without dead ends: 997 [2020-08-22 06:12:38,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-22 06:12:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-08-22 06:12:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 919. [2020-08-22 06:12:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-08-22 06:12:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1115 transitions. [2020-08-22 06:12:38,279 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1115 transitions. Word has length 93 [2020-08-22 06:12:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:38,279 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1115 transitions. [2020-08-22 06:12:38,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:12:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1115 transitions. [2020-08-22 06:12:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 06:12:38,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:38,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:38,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:12:38,284 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -643321942, now seen corresponding path program 1 times [2020-08-22 06:12:38,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:38,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201872738] [2020-08-22 06:12:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,632 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:38,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:12:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 06:12:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 06:12:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:12:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 06:12:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 06:12:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 06:12:38,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201872738] [2020-08-22 06:12:38,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:12:38,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 06:12:38,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204261586] [2020-08-22 06:12:38,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:12:38,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:12:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:12:38,816 INFO L87 Difference]: Start difference. First operand 919 states and 1115 transitions. Second operand 12 states. [2020-08-22 06:12:39,373 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:40,029 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:40,748 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:41,072 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:41,321 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:12:41,625 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:41,917 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:44,106 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:44,376 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:44,968 INFO L93 Difference]: Finished difference Result 2611 states and 3380 transitions. [2020-08-22 06:12:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 06:12:44,972 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-08-22 06:12:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:44,984 INFO L225 Difference]: With dead ends: 2611 [2020-08-22 06:12:44,984 INFO L226 Difference]: Without dead ends: 1912 [2020-08-22 06:12:44,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 06:12:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2020-08-22 06:12:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1606. [2020-08-22 06:12:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-22 06:12:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1936 transitions. [2020-08-22 06:12:45,327 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1936 transitions. Word has length 97 [2020-08-22 06:12:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:45,329 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 1936 transitions. [2020-08-22 06:12:45,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:12:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1936 transitions. [2020-08-22 06:12:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-22 06:12:45,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:45,339 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:45,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:12:45,339 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1477147143, now seen corresponding path program 1 times [2020-08-22 06:12:45,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:45,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115798938] [2020-08-22 06:12:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,669 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:45,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:12:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 06:12:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:12:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:12:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:12:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 06:12:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 06:12:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 06:12:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 06:12:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-22 06:12:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-22 06:12:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 06:12:45,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115798938] [2020-08-22 06:12:45,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:12:45,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 06:12:45,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062315290] [2020-08-22 06:12:45,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 06:12:45,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:45,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 06:12:45,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-08-22 06:12:45,924 INFO L87 Difference]: Start difference. First operand 1606 states and 1936 transitions. Second operand 16 states. [2020-08-22 06:12:46,481 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:12:46,828 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-08-22 06:12:47,083 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-08-22 06:12:47,333 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-08-22 06:12:48,047 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:48,357 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:48,732 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-22 06:12:49,044 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-22 06:12:50,130 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:50,793 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:51,070 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:12:51,402 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:12:51,955 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:52,338 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:12:52,706 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-22 06:12:53,466 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:12:53,806 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-22 06:12:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:12:54,582 INFO L93 Difference]: Finished difference Result 3483 states and 4326 transitions. [2020-08-22 06:12:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 06:12:54,583 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2020-08-22 06:12:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:12:54,595 INFO L225 Difference]: With dead ends: 3483 [2020-08-22 06:12:54,596 INFO L226 Difference]: Without dead ends: 2085 [2020-08-22 06:12:54,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=589, Invalid=2167, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 06:12:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-08-22 06:12:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1893. [2020-08-22 06:12:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1893 states. [2020-08-22 06:12:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2238 transitions. [2020-08-22 06:12:54,920 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2238 transitions. Word has length 159 [2020-08-22 06:12:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:12:54,921 INFO L479 AbstractCegarLoop]: Abstraction has 1893 states and 2238 transitions. [2020-08-22 06:12:54,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 06:12:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2238 transitions. [2020-08-22 06:12:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-08-22 06:12:54,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:12:54,929 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:12:54,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:12:54,930 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:12:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:12:54,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1275093309, now seen corresponding path program 1 times [2020-08-22 06:12:54,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:12:54,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979633520] [2020-08-22 06:12:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:12:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,412 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:12:55,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:12:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:12:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:12:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:12:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:12:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 06:12:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:12:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:12:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:12:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 06:12:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 06:12:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 06:12:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:12:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 06:12:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:12:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 06:12:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 06:12:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 06:12:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-22 06:12:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-08-22 06:12:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:12:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-08-22 06:12:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:12:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:12:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:12:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 06:12:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-22 06:12:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:12:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 84 proven. 29 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-08-22 06:12:55,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979633520] [2020-08-22 06:12:55,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:12:55,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 06:12:55,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864649573] [2020-08-22 06:12:55,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 06:12:55,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:12:55,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 06:12:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 06:12:55,987 INFO L87 Difference]: Start difference. First operand 1893 states and 2238 transitions. Second operand 15 states. [2020-08-22 06:12:57,668 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 06:12:57,953 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:12:58,209 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:12:58,497 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:12:59,439 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:13:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:13:01,124 INFO L93 Difference]: Finished difference Result 5185 states and 6381 transitions. [2020-08-22 06:13:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 06:13:01,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 281 [2020-08-22 06:13:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:13:01,147 INFO L225 Difference]: With dead ends: 5185 [2020-08-22 06:13:01,147 INFO L226 Difference]: Without dead ends: 3002 [2020-08-22 06:13:01,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2020-08-22 06:13:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2020-08-22 06:13:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2604. [2020-08-22 06:13:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2604 states. [2020-08-22 06:13:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3157 transitions. [2020-08-22 06:13:01,645 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3157 transitions. Word has length 281 [2020-08-22 06:13:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:13:01,645 INFO L479 AbstractCegarLoop]: Abstraction has 2604 states and 3157 transitions. [2020-08-22 06:13:01,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 06:13:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3157 transitions. [2020-08-22 06:13:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-08-22 06:13:01,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:13:01,656 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:13:01,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:13:01,657 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:13:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:13:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash 154824420, now seen corresponding path program 1 times [2020-08-22 06:13:01,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:13:01,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710936157] [2020-08-22 06:13:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:13:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,021 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 06:13:02,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:13:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 06:13:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:13:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:13:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 06:13:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:13:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:13:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 06:13:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:13:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:13:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 06:13:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:13:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:13:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:13:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:13:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:13:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:13:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 06:13:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:13:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:13:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:13:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 06:13:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:13:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:13:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 06:13:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:13:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:13:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:13:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 06:13:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 06:13:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:13:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:13:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 06:13:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 06:13:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:13:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:13:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 06:13:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 06:13:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:13:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-08-22 06:13:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:13:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-08-22 06:13:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:13:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:13:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 06:13:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:13:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 06:13:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-08-22 06:13:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:13:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-08-22 06:13:02,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710936157] [2020-08-22 06:13:02,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:13:02,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 06:13:02,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157879790] [2020-08-22 06:13:02,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 06:13:02,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:13:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 06:13:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-08-22 06:13:02,470 INFO L87 Difference]: Start difference. First operand 2604 states and 3157 transitions. Second operand 16 states. [2020-08-22 06:13:03,129 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:13:03,459 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:13:03,714 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:13:03,968 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-22 06:13:04,710 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:13:05,771 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 06:13:06,068 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:13:06,310 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:13:06,840 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:13:07,631 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:13:07,912 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 06:13:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:13:08,700 INFO L93 Difference]: Finished difference Result 4984 states and 6131 transitions. [2020-08-22 06:13:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 06:13:08,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 283 [2020-08-22 06:13:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:13:08,721 INFO L225 Difference]: With dead ends: 4984 [2020-08-22 06:13:08,722 INFO L226 Difference]: Without dead ends: 2611 [2020-08-22 06:13:08,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 06:13:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2020-08-22 06:13:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2535. [2020-08-22 06:13:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2535 states. [2020-08-22 06:13:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 3048 transitions. [2020-08-22 06:13:09,192 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 3048 transitions. Word has length 283 [2020-08-22 06:13:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:13:09,195 INFO L479 AbstractCegarLoop]: Abstraction has 2535 states and 3048 transitions. [2020-08-22 06:13:09,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 06:13:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 3048 transitions. [2020-08-22 06:13:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-08-22 06:13:09,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:13:09,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-22 06:13:09,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:13:09,215 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:13:09,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:13:09,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1258456098, now seen corresponding path program 1 times [2020-08-22 06:13:09,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:13:09,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083783196] [2020-08-22 06:13:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:13:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat