/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product47.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:01:12,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:01:12,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:01:12,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:01:12,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:01:12,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:01:12,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:01:12,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:01:12,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:01:12,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:01:12,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:01:12,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:01:12,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:01:12,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:01:12,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:01:12,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:01:12,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:01:12,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:01:12,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:01:12,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:01:12,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:01:12,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:01:12,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:01:12,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:01:12,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:01:12,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:01:12,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:01:12,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:01:12,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:01:12,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:01:12,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:01:12,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:01:12,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:01:12,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:01:12,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:01:12,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:01:12,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:01:12,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:01:12,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:01:12,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:01:12,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:01:12,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:01:12,429 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:01:12,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:01:12,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:01:12,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:01:12,432 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:01:12,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:01:12,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:01:12,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:01:12,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:01:12,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:01:12,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:01:12,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:01:12,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:01:12,437 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:01:12,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:01:12,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:01:12,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:01:12,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:01:12,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:01:12,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:01:12,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:01:12,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:01:12,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:01:12,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:01:12,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:01:12,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:01:12,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:01:12,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:01:12,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:01:12,442 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:01:12,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:01:12,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:01:12,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:01:12,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:01:12,813 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:01:12,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product47.cil.c [2020-08-21 18:01:12,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a67926bc9/a0762127754c4fc0b9e2e6e31567c9ab/FLAGa34b976fe [2020-08-21 18:01:13,488 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:01:13,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product47.cil.c [2020-08-21 18:01:13,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a67926bc9/a0762127754c4fc0b9e2e6e31567c9ab/FLAGa34b976fe [2020-08-21 18:01:13,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a67926bc9/a0762127754c4fc0b9e2e6e31567c9ab [2020-08-21 18:01:13,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:01:13,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:01:13,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:01:13,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:01:13,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:01:13,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:01:13" (1/1) ... [2020-08-21 18:01:13,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:13, skipping insertion in model container [2020-08-21 18:01:13,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:01:13" (1/1) ... [2020-08-21 18:01:13,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:01:13,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:01:14,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:01:14,231 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:01:14,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:01:14,351 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:01:14,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14 WrapperNode [2020-08-21 18:01:14,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:01:14,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:01:14,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:01:14,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:01:14,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (1/1) ... [2020-08-21 18:01:14,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (1/1) ... [2020-08-21 18:01:14,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (1/1) ... [2020-08-21 18:01:14,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (1/1) ... [2020-08-21 18:01:14,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (1/1) ... [2020-08-21 18:01:14,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (1/1) ... [2020-08-21 18:01:14,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (1/1) ... [2020-08-21 18:01:14,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:01:14,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:01:14,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:01:14,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:01:14,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:01:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:01:14,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:01:14,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 18:01:14,554 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 18:01:14,554 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 18:01:14,554 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 18:01:14,554 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 18:01:14,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:01:14,555 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 18:01:14,555 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 18:01:14,555 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 18:01:14,555 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 18:01:14,555 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 18:01:14,556 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-21 18:01:14,556 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 18:01:14,556 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 18:01:14,556 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 18:01:14,556 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 18:01:14,556 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 18:01:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 18:01:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 18:01:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 18:01:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 18:01:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 18:01:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 18:01:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 18:01:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 18:01:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 18:01:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 18:01:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 18:01:14,558 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 18:01:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 18:01:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 18:01:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 18:01:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 18:01:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 18:01:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 18:01:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 18:01:14,560 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 18:01:14,560 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 18:01:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:01:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:01:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 18:01:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 18:01:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 18:01:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 18:01:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 18:01:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 18:01:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 18:01:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 18:01:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 18:01:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 18:01:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 18:01:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 18:01:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 18:01:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:01:14,562 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 18:01:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 18:01:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 18:01:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 18:01:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 18:01:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 18:01:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 18:01:14,563 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 18:01:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 18:01:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 18:01:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 18:01:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 18:01:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 18:01:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 18:01:14,564 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-21 18:01:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:01:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 18:01:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:01:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 18:01:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 18:01:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:01:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:01:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:01:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:01:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 18:01:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:01:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 18:01:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 18:01:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:01:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 18:01:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 18:01:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 18:01:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 18:01:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 18:01:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 18:01:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:01:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 18:01:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:01:15,709 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:01:15,710 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 18:01:15,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:01:15 BoogieIcfgContainer [2020-08-21 18:01:15,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:01:15,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:01:15,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:01:15,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:01:15,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:01:13" (1/3) ... [2020-08-21 18:01:15,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615c2b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:01:15, skipping insertion in model container [2020-08-21 18:01:15,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:01:14" (2/3) ... [2020-08-21 18:01:15,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615c2b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:01:15, skipping insertion in model container [2020-08-21 18:01:15,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:01:15" (3/3) ... [2020-08-21 18:01:15,724 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product47.cil.c [2020-08-21 18:01:15,734 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:01:15,742 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:01:15,756 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:01:15,780 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:01:15,780 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:01:15,780 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:01:15,781 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:01:15,781 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:01:15,781 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:01:15,781 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:01:15,781 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:01:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states. [2020-08-21 18:01:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 18:01:15,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:15,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:15,815 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2007114508, now seen corresponding path program 1 times [2020-08-21 18:01:15,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:15,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672592474] [2020-08-21 18:01:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:16,483 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:16,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:16,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:16,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:16,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 18:01:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:16,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 18:01:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:01:16,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672592474] [2020-08-21 18:01:16,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:01:16,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:01:16,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842113972] [2020-08-21 18:01:16,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:01:16,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:01:16,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:01:16,637 INFO L87 Difference]: Start difference. First operand 182 states. Second operand 3 states. [2020-08-21 18:01:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:17,827 INFO L93 Difference]: Finished difference Result 323 states and 421 transitions. [2020-08-21 18:01:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:01:17,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 18:01:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:17,844 INFO L225 Difference]: With dead ends: 323 [2020-08-21 18:01:17,844 INFO L226 Difference]: Without dead ends: 175 [2020-08-21 18:01:17,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:01:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-08-21 18:01:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2020-08-21 18:01:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-08-21 18:01:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2020-08-21 18:01:17,971 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 46 [2020-08-21 18:01:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:17,972 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2020-08-21 18:01:17,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:01:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2020-08-21 18:01:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 18:01:17,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:17,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:17,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:01:17,977 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:17,978 INFO L82 PathProgramCache]: Analyzing trace with hash 622418136, now seen corresponding path program 1 times [2020-08-21 18:01:17,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:17,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772557212] [2020-08-21 18:01:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:18,309 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:18,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:18,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:18,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:18,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:18,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:01:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:18,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 18:01:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:01:18,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772557212] [2020-08-21 18:01:18,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:01:18,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:01:18,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452816223] [2020-08-21 18:01:18,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:01:18,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:01:18,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:01:18,354 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand 4 states. [2020-08-21 18:01:18,743 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:19,634 INFO L93 Difference]: Finished difference Result 250 states and 304 transitions. [2020-08-21 18:01:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:01:19,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 18:01:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:19,639 INFO L225 Difference]: With dead ends: 250 [2020-08-21 18:01:19,639 INFO L226 Difference]: Without dead ends: 159 [2020-08-21 18:01:19,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:01:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-08-21 18:01:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 130. [2020-08-21 18:01:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-08-21 18:01:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2020-08-21 18:01:19,684 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 47 [2020-08-21 18:01:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:19,684 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2020-08-21 18:01:19,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:01:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2020-08-21 18:01:19,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:01:19,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:19,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:19,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:01:19,688 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:19,688 INFO L82 PathProgramCache]: Analyzing trace with hash -943300313, now seen corresponding path program 1 times [2020-08-21 18:01:19,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:19,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115279903] [2020-08-21 18:01:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:20,042 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:20,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:20,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:20,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:20,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:20,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:01:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 18:01:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:01:20,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115279903] [2020-08-21 18:01:20,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:01:20,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:01:20,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88632611] [2020-08-21 18:01:20,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:01:20,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:20,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:01:20,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:01:20,187 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand 8 states. [2020-08-21 18:01:20,553 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:20,858 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:21,150 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:21,392 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:22,147 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:24,169 INFO L93 Difference]: Finished difference Result 446 states and 552 transitions. [2020-08-21 18:01:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:01:24,170 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-21 18:01:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:24,176 INFO L225 Difference]: With dead ends: 446 [2020-08-21 18:01:24,176 INFO L226 Difference]: Without dead ends: 340 [2020-08-21 18:01:24,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:01:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-21 18:01:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 278. [2020-08-21 18:01:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-08-21 18:01:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 336 transitions. [2020-08-21 18:01:24,254 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 336 transitions. Word has length 51 [2020-08-21 18:01:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:24,255 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 336 transitions. [2020-08-21 18:01:24,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:01:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 336 transitions. [2020-08-21 18:01:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:01:24,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:24,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:24,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:01:24,258 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:24,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1373874698, now seen corresponding path program 1 times [2020-08-21 18:01:24,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:24,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837850927] [2020-08-21 18:01:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,610 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:24,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:01:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 18:01:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 18:01:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:01:24,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837850927] [2020-08-21 18:01:24,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:01:24,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 18:01:24,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810019010] [2020-08-21 18:01:24,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:01:24,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:24,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:01:24,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:01:24,776 INFO L87 Difference]: Start difference. First operand 278 states and 336 transitions. Second operand 12 states. [2020-08-21 18:01:25,181 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:25,513 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:25,770 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:26,030 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:26,619 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:27,442 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:27,863 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:28,213 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:28,538 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:28,802 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:29,309 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:29,642 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:29,913 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:31,823 INFO L93 Difference]: Finished difference Result 1133 states and 1552 transitions. [2020-08-21 18:01:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 18:01:31,823 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 18:01:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:31,836 INFO L225 Difference]: With dead ends: 1133 [2020-08-21 18:01:31,836 INFO L226 Difference]: Without dead ends: 879 [2020-08-21 18:01:31,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:01:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-08-21 18:01:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 782. [2020-08-21 18:01:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 782 states. [2020-08-21 18:01:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 994 transitions. [2020-08-21 18:01:32,051 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 994 transitions. Word has length 57 [2020-08-21 18:01:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:32,052 INFO L479 AbstractCegarLoop]: Abstraction has 782 states and 994 transitions. [2020-08-21 18:01:32,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:01:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 994 transitions. [2020-08-21 18:01:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 18:01:32,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:32,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:32,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:01:32,058 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1561170436, now seen corresponding path program 1 times [2020-08-21 18:01:32,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:32,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653292955] [2020-08-21 18:01:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,361 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:32,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:01:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:01:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 18:01:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 18:01:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:01:32,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653292955] [2020-08-21 18:01:32,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:01:32,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 18:01:32,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227360919] [2020-08-21 18:01:32,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:01:32,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:01:32,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:01:32,466 INFO L87 Difference]: Start difference. First operand 782 states and 994 transitions. Second operand 6 states. [2020-08-21 18:01:32,751 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:34,547 INFO L93 Difference]: Finished difference Result 1911 states and 2577 transitions. [2020-08-21 18:01:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:01:34,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 18:01:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:34,557 INFO L225 Difference]: With dead ends: 1911 [2020-08-21 18:01:34,557 INFO L226 Difference]: Without dead ends: 1153 [2020-08-21 18:01:34,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:01:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2020-08-21 18:01:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1066. [2020-08-21 18:01:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-21 18:01:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1328 transitions. [2020-08-21 18:01:34,787 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1328 transitions. Word has length 61 [2020-08-21 18:01:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:34,788 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1328 transitions. [2020-08-21 18:01:34,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:01:34,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1328 transitions. [2020-08-21 18:01:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 18:01:34,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:34,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:34,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:01:34,794 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:34,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1580345337, now seen corresponding path program 1 times [2020-08-21 18:01:34,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:34,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204731146] [2020-08-21 18:01:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,145 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:35,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:01:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:01:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:01:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 18:01:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 18:01:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 18:01:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 18:01:35,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204731146] [2020-08-21 18:01:35,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:01:35,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:01:35,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718419130] [2020-08-21 18:01:35,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:01:35,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:01:35,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:01:35,310 INFO L87 Difference]: Start difference. First operand 1066 states and 1328 transitions. Second operand 10 states. [2020-08-21 18:01:35,924 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 18:01:36,449 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:38,442 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:39,986 INFO L93 Difference]: Finished difference Result 2035 states and 2637 transitions. [2020-08-21 18:01:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 18:01:39,987 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-08-21 18:01:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:39,995 INFO L225 Difference]: With dead ends: 2035 [2020-08-21 18:01:39,995 INFO L226 Difference]: Without dead ends: 1270 [2020-08-21 18:01:39,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:01:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2020-08-21 18:01:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1173. [2020-08-21 18:01:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2020-08-21 18:01:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1439 transitions. [2020-08-21 18:01:40,233 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1439 transitions. Word has length 88 [2020-08-21 18:01:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:40,236 INFO L479 AbstractCegarLoop]: Abstraction has 1173 states and 1439 transitions. [2020-08-21 18:01:40,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:01:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1439 transitions. [2020-08-21 18:01:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-21 18:01:40,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:40,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:40,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:01:40,244 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1992976932, now seen corresponding path program 1 times [2020-08-21 18:01:40,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:40,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277164752] [2020-08-21 18:01:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,509 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:40,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 18:01:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:01:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 18:01:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:01:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 18:01:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 18:01:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-21 18:01:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-21 18:01:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 18:01:40,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277164752] [2020-08-21 18:01:40,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:01:40,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:01:40,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930964113] [2020-08-21 18:01:40,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:01:40,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:40,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:01:40,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:01:40,710 INFO L87 Difference]: Start difference. First operand 1173 states and 1439 transitions. Second operand 10 states. [2020-08-21 18:01:41,693 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:41,932 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:42,198 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:42,441 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:43,605 INFO L93 Difference]: Finished difference Result 2475 states and 3246 transitions. [2020-08-21 18:01:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:01:43,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 141 [2020-08-21 18:01:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:43,616 INFO L225 Difference]: With dead ends: 2475 [2020-08-21 18:01:43,616 INFO L226 Difference]: Without dead ends: 1326 [2020-08-21 18:01:43,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:01:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2020-08-21 18:01:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1203. [2020-08-21 18:01:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2020-08-21 18:01:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1473 transitions. [2020-08-21 18:01:43,883 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1473 transitions. Word has length 141 [2020-08-21 18:01:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:43,883 INFO L479 AbstractCegarLoop]: Abstraction has 1203 states and 1473 transitions. [2020-08-21 18:01:43,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:01:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1473 transitions. [2020-08-21 18:01:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-21 18:01:43,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:43,888 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:43,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:01:43,888 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1964476642, now seen corresponding path program 1 times [2020-08-21 18:01:43,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:43,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622907139] [2020-08-21 18:01:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,195 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:44,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 18:01:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:01:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 18:01:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:01:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 18:01:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 18:01:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-21 18:01:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-21 18:01:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 18:01:44,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622907139] [2020-08-21 18:01:44,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:01:44,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:01:44,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736455351] [2020-08-21 18:01:44,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:01:44,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:44,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:01:44,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:01:44,419 INFO L87 Difference]: Start difference. First operand 1203 states and 1473 transitions. Second operand 12 states. [2020-08-21 18:01:44,984 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:45,206 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:45,431 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:46,056 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:46,315 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:46,544 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:47,734 INFO L93 Difference]: Finished difference Result 2205 states and 2787 transitions. [2020-08-21 18:01:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:01:47,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2020-08-21 18:01:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:47,742 INFO L225 Difference]: With dead ends: 2205 [2020-08-21 18:01:47,742 INFO L226 Difference]: Without dead ends: 1026 [2020-08-21 18:01:47,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:01:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-08-21 18:01:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 970. [2020-08-21 18:01:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-08-21 18:01:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1172 transitions. [2020-08-21 18:01:47,929 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1172 transitions. Word has length 141 [2020-08-21 18:01:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:47,929 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1172 transitions. [2020-08-21 18:01:47,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:01:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1172 transitions. [2020-08-21 18:01:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 18:01:47,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:47,936 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:47,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:01:47,936 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash -872576729, now seen corresponding path program 1 times [2020-08-21 18:01:47,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:47,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305148304] [2020-08-21 18:01:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,206 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:48,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:01:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 18:01:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:01:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 18:01:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 18:01:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-21 18:01:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 18:01:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-21 18:01:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 18:01:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 18:01:48,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305148304] [2020-08-21 18:01:48,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:01:48,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:01:48,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077902673] [2020-08-21 18:01:48,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:01:48,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:48,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:01:48,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:01:48,416 INFO L87 Difference]: Start difference. First operand 970 states and 1172 transitions. Second operand 13 states. [2020-08-21 18:01:48,995 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:49,676 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:50,985 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:51,309 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:51,562 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:51,800 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:52,114 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:52,389 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:53,375 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:53,619 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:53,886 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:54,125 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:54,838 INFO L93 Difference]: Finished difference Result 2803 states and 3512 transitions. [2020-08-21 18:01:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 18:01:54,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 145 [2020-08-21 18:01:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:54,850 INFO L225 Difference]: With dead ends: 2803 [2020-08-21 18:01:54,850 INFO L226 Difference]: Without dead ends: 1857 [2020-08-21 18:01:54,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 18:01:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2020-08-21 18:01:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1755. [2020-08-21 18:01:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1755 states. [2020-08-21 18:01:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2091 transitions. [2020-08-21 18:01:55,165 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2091 transitions. Word has length 145 [2020-08-21 18:01:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:55,167 INFO L479 AbstractCegarLoop]: Abstraction has 1755 states and 2091 transitions. [2020-08-21 18:01:55,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:01:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2091 transitions. [2020-08-21 18:01:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-21 18:01:55,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:55,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:01:55,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:01:55,173 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1489780363, now seen corresponding path program 1 times [2020-08-21 18:01:55,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:55,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454027418] [2020-08-21 18:01:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,449 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:01:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 18:01:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:01:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:01:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 18:01:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-21 18:01:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-21 18:01:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 18:01:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 18:01:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-21 18:01:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-21 18:01:55,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454027418] [2020-08-21 18:01:55,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:01:55,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 18:01:55,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492943474] [2020-08-21 18:01:55,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 18:01:55,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:55,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 18:01:55,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:01:55,925 INFO L87 Difference]: Start difference. First operand 1755 states and 2091 transitions. Second operand 18 states. [2020-08-21 18:01:56,554 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:56,895 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:57,143 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:57,378 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:57,971 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:59,608 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:59,972 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:02:00,246 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:02:00,500 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:02:00,874 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:02:01,139 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:02:01,666 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 190 [2020-08-21 18:02:02,151 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 190 [2020-08-21 18:02:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:02:03,668 INFO L93 Difference]: Finished difference Result 3380 states and 4249 transitions. [2020-08-21 18:02:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 18:02:03,669 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 149 [2020-08-21 18:02:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:02:03,684 INFO L225 Difference]: With dead ends: 3380 [2020-08-21 18:02:03,684 INFO L226 Difference]: Without dead ends: 1959 [2020-08-21 18:02:03,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=364, Invalid=1442, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 18:02:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2020-08-21 18:02:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1677. [2020-08-21 18:02:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2020-08-21 18:02:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 1989 transitions. [2020-08-21 18:02:04,050 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 1989 transitions. Word has length 149 [2020-08-21 18:02:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:02:04,050 INFO L479 AbstractCegarLoop]: Abstraction has 1677 states and 1989 transitions. [2020-08-21 18:02:04,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 18:02:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 1989 transitions. [2020-08-21 18:02:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-21 18:02:04,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:02:04,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:02:04,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:02:04,057 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:02:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:02:04,058 INFO L82 PathProgramCache]: Analyzing trace with hash -913393781, now seen corresponding path program 2 times [2020-08-21 18:02:04,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:02:04,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621870470] [2020-08-21 18:02:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:02:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,407 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:02:04,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:02:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:02:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:02:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:02:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:02:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:02:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 18:02:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:02:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:02:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 18:02:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:02:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-21 18:02:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-21 18:02:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 18:02:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 18:02:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-21 18:02:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-21 18:02:04,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621870470] [2020-08-21 18:02:04,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:02:04,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:02:04,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351581667] [2020-08-21 18:02:04,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:02:04,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:02:04,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:02:04,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:02:04,604 INFO L87 Difference]: Start difference. First operand 1677 states and 1989 transitions. Second operand 11 states. [2020-08-21 18:02:05,056 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:02:07,074 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:02:07,298 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:02:07,544 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:02:07,799 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:02:08,037 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:02:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:02:08,579 INFO L93 Difference]: Finished difference Result 1987 states and 2521 transitions. [2020-08-21 18:02:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 18:02:08,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 149 [2020-08-21 18:02:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:02:08,592 INFO L225 Difference]: With dead ends: 1987 [2020-08-21 18:02:08,593 INFO L226 Difference]: Without dead ends: 1984 [2020-08-21 18:02:08,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:02:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2020-08-21 18:02:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1677. [2020-08-21 18:02:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2020-08-21 18:02:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 1979 transitions. [2020-08-21 18:02:08,841 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 1979 transitions. Word has length 149 [2020-08-21 18:02:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:02:08,842 INFO L479 AbstractCegarLoop]: Abstraction has 1677 states and 1979 transitions. [2020-08-21 18:02:08,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:02:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 1979 transitions. [2020-08-21 18:02:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-21 18:02:08,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:02:08,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:02:08,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:02:08,847 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:02:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:02:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1994425787, now seen corresponding path program 1 times [2020-08-21 18:02:08,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:02:08,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138416232] [2020-08-21 18:02:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:02:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,147 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:02:09,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:02:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:02:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:02:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:02:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:02:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:02:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 18:02:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:02:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:02:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 18:02:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 18:02:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-21 18:02:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:02:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 18:02:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:02:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 18:02:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-21 18:02:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:02:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 18:02:09,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138416232] [2020-08-21 18:02:09,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:02:09,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:02:09,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399220969] [2020-08-21 18:02:09,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:02:09,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:02:09,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:02:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:02:09,341 INFO L87 Difference]: Start difference. First operand 1677 states and 1979 transitions. Second operand 12 states. [2020-08-21 18:02:09,715 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:02:10,532 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:02:10,798 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:02:11,043 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:02:11,283 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:02:11,507 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186