/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=NARROWEST --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_spec1_product42.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:08:03,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:08:03,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:08:03,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:08:03,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:08:03,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:08:03,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:08:03,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:08:03,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:08:03,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:08:03,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:08:03,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:08:03,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:08:03,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:08:03,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:08:03,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:08:03,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:08:03,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:08:03,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:08:03,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:08:03,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:08:03,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:08:03,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:08:03,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:08:03,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:08:03,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:08:03,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:08:03,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:08:03,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:08:03,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:08:03,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:08:03,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:08:03,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:08:03,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:08:03,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:08:03,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:08:03,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:08:03,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:08:03,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:08:03,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:08:03,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:08:03,493 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 21:08:03,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:08:03,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:08:03,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:08:03,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:08:03,519 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:08:03,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:08:03,519 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:08:03,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:08:03,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:08:03,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:08:03,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:08:03,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:08:03,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:08:03,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:08:03,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:08:03,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:08:03,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:08:03,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:08:03,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:08:03,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:08:03,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:08:03,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:08:03,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:08:03,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:08:03,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:08:03,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:08:03,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:08:03,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:08:03,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:08:03,524 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=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:08:03,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:08:03,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:08:03,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:08:03,855 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:08:03,856 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:08:03,856 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product42.cil.c [2020-08-21 21:08:03,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ae59424f/c5488ff36c2942b2a728f7edba00280d/FLAG16d0fa755 [2020-08-21 21:08:04,499 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:08:04,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product42.cil.c [2020-08-21 21:08:04,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ae59424f/c5488ff36c2942b2a728f7edba00280d/FLAG16d0fa755 [2020-08-21 21:08:04,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ae59424f/c5488ff36c2942b2a728f7edba00280d [2020-08-21 21:08:04,905 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:08:04,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:08:04,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:08:04,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:08:04,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:08:04,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:08:04" (1/1) ... [2020-08-21 21:08:04,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f389357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:04, skipping insertion in model container [2020-08-21 21:08:04,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:08:04" (1/1) ... [2020-08-21 21:08:04,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:08:04,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:08:05,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:08:05,361 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:08:05,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:08:05,493 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:08:05,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05 WrapperNode [2020-08-21 21:08:05,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:08:05,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:08:05,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:08:05,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:08:05,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (1/1) ... [2020-08-21 21:08:05,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (1/1) ... [2020-08-21 21:08:05,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (1/1) ... [2020-08-21 21:08:05,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (1/1) ... [2020-08-21 21:08:05,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (1/1) ... [2020-08-21 21:08:05,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (1/1) ... [2020-08-21 21:08:05,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (1/1) ... [2020-08-21 21:08:05,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:08:05,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:08:05,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:08:05,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:08:05,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (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 21:08:05,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:08:05,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:08:05,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 21:08:05,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 21:08:05,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 21:08:05,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 21:08:05,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 21:08:05,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 21:08:05,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 21:08:05,647 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 21:08:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 21:08:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 21:08:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 21:08:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 21:08:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 21:08:05,649 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 21:08:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 21:08:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 21:08:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 21:08:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 21:08:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-21 21:08:05,651 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 21:08:05,651 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 21:08:05,651 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 21:08:05,651 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 21:08:05,652 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 21:08:05,652 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 21:08:05,652 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 21:08:05,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 21:08:05,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 21:08:05,653 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 21:08:05,653 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 21:08:05,653 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 21:08:05,653 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 21:08:05,654 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 21:08:05,654 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 21:08:05,654 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 21:08:05,654 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 21:08:05,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:08:05,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:08:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:08:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 21:08:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 21:08:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:08:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:08:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 21:08:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 21:08:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:08:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:08:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:08:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 21:08:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:08:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 21:08:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 21:08:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:08:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 21:08:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 21:08:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:08:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 21:08:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 21:08:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 21:08:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 21:08:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 21:08:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 21:08:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 21:08:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 21:08:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 21:08:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 21:08:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 21:08:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 21:08:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 21:08:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 21:08:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 21:08:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 21:08:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 21:08:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 21:08:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 21:08:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 21:08:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-21 21:08:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 21:08:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 21:08:05,664 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 21:08:05,664 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 21:08:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 21:08:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 21:08:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 21:08:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 21:08:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 21:08:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:08:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:08:05,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 21:08:05,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:08:06,771 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:08:06,772 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 21:08:06,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:08:06 BoogieIcfgContainer [2020-08-21 21:08:06,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:08:06,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:08:06,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:08:06,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:08:06,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:08:04" (1/3) ... [2020-08-21 21:08:06,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eeb1528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:08:06, skipping insertion in model container [2020-08-21 21:08:06,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:08:05" (2/3) ... [2020-08-21 21:08:06,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eeb1528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:08:06, skipping insertion in model container [2020-08-21 21:08:06,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:08:06" (3/3) ... [2020-08-21 21:08:06,786 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product42.cil.c [2020-08-21 21:08:06,796 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:08:06,805 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:08:06,819 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:08:06,843 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:08:06,843 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:08:06,843 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:08:06,844 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:08:06,844 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:08:06,844 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:08:06,844 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:08:06,845 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:08:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-08-21 21:08:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 21:08:06,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:06,880 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 21:08:06,881 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:06,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:06,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1542772809, now seen corresponding path program 1 times [2020-08-21 21:08:06,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:06,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286004987] [2020-08-21 21:08:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:07,504 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:07,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:07,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:07,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:07,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:07,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:07,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:08:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:07,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:08:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:07,589 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 21:08:07,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286004987] [2020-08-21 21:08:07,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:07,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:08:07,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125133324] [2020-08-21 21:08:07,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:08:07,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:07,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:08:07,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:08:07,625 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 3 states. [2020-08-21 21:08:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:08,647 INFO L93 Difference]: Finished difference Result 284 states and 371 transitions. [2020-08-21 21:08:08,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:08:08,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 21:08:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:08,666 INFO L225 Difference]: With dead ends: 284 [2020-08-21 21:08:08,666 INFO L226 Difference]: Without dead ends: 154 [2020-08-21 21:08:08,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:08:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-21 21:08:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 121. [2020-08-21 21:08:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-21 21:08:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2020-08-21 21:08:08,761 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 46 [2020-08-21 21:08:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:08,762 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2020-08-21 21:08:08,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:08:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2020-08-21 21:08:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 21:08:08,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:08,766 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 21:08:08,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:08:08,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:08,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1355296267, now seen corresponding path program 1 times [2020-08-21 21:08:08,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:08,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473834199] [2020-08-21 21:08:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:09,156 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:09,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:09,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:09,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:09,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:09,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:09,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:08:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:09,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:08:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:09,253 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 21:08:09,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473834199] [2020-08-21 21:08:09,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:09,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:08:09,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523287672] [2020-08-21 21:08:09,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:08:09,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:09,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:08:09,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:08:09,258 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand 4 states. [2020-08-21 21:08:09,633 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:10,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:10,412 INFO L93 Difference]: Finished difference Result 213 states and 258 transitions. [2020-08-21 21:08:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:08:10,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 21:08:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:10,415 INFO L225 Difference]: With dead ends: 213 [2020-08-21 21:08:10,415 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 21:08:10,417 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 21:08:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 21:08:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2020-08-21 21:08:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 21:08:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2020-08-21 21:08:10,452 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 47 [2020-08-21 21:08:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:10,452 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2020-08-21 21:08:10,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:08:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2020-08-21 21:08:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 21:08:10,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:10,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:08:10,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:08:10,455 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 604849678, now seen corresponding path program 1 times [2020-08-21 21:08:10,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:10,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922124540] [2020-08-21 21:08:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:10,805 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:10,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:10,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:10,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:10,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:10,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:10,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:08:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:10,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 21:08:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:10,921 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 21:08:10,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922124540] [2020-08-21 21:08:10,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:10,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:08:10,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312202517] [2020-08-21 21:08:10,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:08:10,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:08:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:08:10,924 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 8 states. [2020-08-21 21:08:11,256 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:11,548 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:11,789 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:12,041 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:13,115 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2020-08-21 21:08:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:08:13,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 21:08:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:13,122 INFO L225 Difference]: With dead ends: 226 [2020-08-21 21:08:13,122 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 21:08:13,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:08:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 21:08:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2020-08-21 21:08:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 21:08:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2020-08-21 21:08:13,155 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 52 [2020-08-21 21:08:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:13,155 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2020-08-21 21:08:13,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:08:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2020-08-21 21:08:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 21:08:13,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:13,157 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] [2020-08-21 21:08:13,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:08:13,158 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:13,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2012335283, now seen corresponding path program 1 times [2020-08-21 21:08:13,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:13,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683601338] [2020-08-21 21:08:13,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,416 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:13,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 21:08:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:08:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 21:08:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 21:08:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:13,524 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 21:08:13,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683601338] [2020-08-21 21:08:13,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:13,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:08:13,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078306547] [2020-08-21 21:08:13,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:08:13,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:13,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:08:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:08:13,528 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 6 states. [2020-08-21 21:08:13,812 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:14,865 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:15,419 INFO L93 Difference]: Finished difference Result 314 states and 386 transitions. [2020-08-21 21:08:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:08:15,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-21 21:08:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:15,423 INFO L225 Difference]: With dead ends: 314 [2020-08-21 21:08:15,424 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 21:08:15,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:08:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 21:08:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 183. [2020-08-21 21:08:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-08-21 21:08:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 209 transitions. [2020-08-21 21:08:15,492 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 209 transitions. Word has length 60 [2020-08-21 21:08:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:15,492 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 209 transitions. [2020-08-21 21:08:15,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:08:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 209 transitions. [2020-08-21 21:08:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 21:08:15,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:15,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:08:15,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:08:15,495 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash 471487289, now seen corresponding path program 1 times [2020-08-21 21:08:15,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:15,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7346680] [2020-08-21 21:08:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,759 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:15,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 21:08:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:08:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:08:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 21:08:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:08:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:15,891 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 21:08:15,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7346680] [2020-08-21 21:08:15,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:15,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:08:15,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708385948] [2020-08-21 21:08:15,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:08:15,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:15,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:08:15,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:08:15,896 INFO L87 Difference]: Start difference. First operand 183 states and 209 transitions. Second operand 8 states. [2020-08-21 21:08:16,224 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:17,252 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:17,568 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:18,057 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:18,278 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:18,549 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:19,248 INFO L93 Difference]: Finished difference Result 547 states and 678 transitions. [2020-08-21 21:08:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:08:19,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-08-21 21:08:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:19,256 INFO L225 Difference]: With dead ends: 547 [2020-08-21 21:08:19,256 INFO L226 Difference]: Without dead ends: 388 [2020-08-21 21:08:19,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:08:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-08-21 21:08:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 321. [2020-08-21 21:08:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-08-21 21:08:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 368 transitions. [2020-08-21 21:08:19,336 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 368 transitions. Word has length 74 [2020-08-21 21:08:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:19,337 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 368 transitions. [2020-08-21 21:08:19,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:08:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 368 transitions. [2020-08-21 21:08:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 21:08:19,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:19,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:08:19,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:08:19,340 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:19,340 INFO L82 PathProgramCache]: Analyzing trace with hash -968585995, now seen corresponding path program 1 times [2020-08-21 21:08:19,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:19,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442444318] [2020-08-21 21:08:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,600 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:19,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:08:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:08:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:08:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:08:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:08:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 21:08:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:19,763 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 21:08:19,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442444318] [2020-08-21 21:08:19,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:19,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:08:19,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557543674] [2020-08-21 21:08:19,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:08:19,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:08:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:08:19,767 INFO L87 Difference]: Start difference. First operand 321 states and 368 transitions. Second operand 9 states. [2020-08-21 21:08:20,157 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:21,237 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:21,505 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:22,325 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:22,576 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:22,796 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:23,075 INFO L93 Difference]: Finished difference Result 430 states and 544 transitions. [2020-08-21 21:08:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 21:08:23,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-08-21 21:08:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:23,081 INFO L225 Difference]: With dead ends: 430 [2020-08-21 21:08:23,081 INFO L226 Difference]: Without dead ends: 427 [2020-08-21 21:08:23,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 21:08:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-08-21 21:08:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 321. [2020-08-21 21:08:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-08-21 21:08:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 367 transitions. [2020-08-21 21:08:23,162 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 367 transitions. Word has length 78 [2020-08-21 21:08:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:23,162 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 367 transitions. [2020-08-21 21:08:23,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:08:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 367 transitions. [2020-08-21 21:08:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 21:08:23,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:23,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:08:23,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:08:23,166 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:23,166 INFO L82 PathProgramCache]: Analyzing trace with hash 662445521, now seen corresponding path program 1 times [2020-08-21 21:08:23,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:23,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215389700] [2020-08-21 21:08:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,456 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:23,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:08:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:08:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:08:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:08:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 21:08:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 21:08:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:08:23,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215389700] [2020-08-21 21:08:23,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:23,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:08:23,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270263581] [2020-08-21 21:08:23,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:08:23,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:08:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:08:23,576 INFO L87 Difference]: Start difference. First operand 321 states and 367 transitions. Second operand 9 states. [2020-08-21 21:08:24,431 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:08:24,662 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:08:24,891 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:25,133 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:26,023 INFO L93 Difference]: Finished difference Result 732 states and 917 transitions. [2020-08-21 21:08:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:08:26,024 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 94 [2020-08-21 21:08:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:26,028 INFO L225 Difference]: With dead ends: 732 [2020-08-21 21:08:26,028 INFO L226 Difference]: Without dead ends: 435 [2020-08-21 21:08:26,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 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 21:08:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-08-21 21:08:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 331. [2020-08-21 21:08:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-08-21 21:08:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 377 transitions. [2020-08-21 21:08:26,096 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 377 transitions. Word has length 94 [2020-08-21 21:08:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:26,097 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 377 transitions. [2020-08-21 21:08:26,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:08:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 377 transitions. [2020-08-21 21:08:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 21:08:26,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:26,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:08:26,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:08:26,100 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:26,100 INFO L82 PathProgramCache]: Analyzing trace with hash -234947757, now seen corresponding path program 1 times [2020-08-21 21:08:26,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:26,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457918718] [2020-08-21 21:08:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,375 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:08:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:08:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:08:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:08:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 21:08:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 21:08:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:08:26,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457918718] [2020-08-21 21:08:26,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:26,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 21:08:26,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261005953] [2020-08-21 21:08:26,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:08:26,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:26,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:08:26,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:08:26,539 INFO L87 Difference]: Start difference. First operand 331 states and 377 transitions. Second operand 11 states. [2020-08-21 21:08:27,029 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:27,253 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:27,482 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:28,078 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:28,318 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:28,555 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:08:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:29,594 INFO L93 Difference]: Finished difference Result 752 states and 939 transitions. [2020-08-21 21:08:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:08:29,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-08-21 21:08:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:29,598 INFO L225 Difference]: With dead ends: 752 [2020-08-21 21:08:29,598 INFO L226 Difference]: Without dead ends: 445 [2020-08-21 21:08:29,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 21:08:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-08-21 21:08:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 339. [2020-08-21 21:08:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-08-21 21:08:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 385 transitions. [2020-08-21 21:08:29,663 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 385 transitions. Word has length 94 [2020-08-21 21:08:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:29,663 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 385 transitions. [2020-08-21 21:08:29,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:08:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 385 transitions. [2020-08-21 21:08:29,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 21:08:29,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:29,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:08:29,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:08:29,666 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:29,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1735991700, now seen corresponding path program 1 times [2020-08-21 21:08:29,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:29,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827629384] [2020-08-21 21:08:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:29,926 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:29,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:29,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:29,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:29,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:29,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:29,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:08:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:29,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:08:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:08:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:08:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 21:08:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 21:08:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:08:30,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827629384] [2020-08-21 21:08:30,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:08:30,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:08:30,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930767953] [2020-08-21 21:08:30,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:08:30,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:08:30,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:08:30,065 INFO L87 Difference]: Start difference. First operand 339 states and 385 transitions. Second operand 7 states. [2020-08-21 21:08:30,415 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:30,940 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:33,052 INFO L93 Difference]: Finished difference Result 1074 states and 1381 transitions. [2020-08-21 21:08:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:08:33,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-08-21 21:08:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:33,058 INFO L225 Difference]: With dead ends: 1074 [2020-08-21 21:08:33,058 INFO L226 Difference]: Without dead ends: 759 [2020-08-21 21:08:33,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:08:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2020-08-21 21:08:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 639. [2020-08-21 21:08:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-08-21 21:08:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 751 transitions. [2020-08-21 21:08:33,252 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 751 transitions. Word has length 94 [2020-08-21 21:08:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:33,252 INFO L479 AbstractCegarLoop]: Abstraction has 639 states and 751 transitions. [2020-08-21 21:08:33,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:08:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 751 transitions. [2020-08-21 21:08:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 21:08:33,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:33,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:08:33,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:08:33,255 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1966005102, now seen corresponding path program 1 times [2020-08-21 21:08:33,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:33,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686299429] [2020-08-21 21:08:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,530 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:08:33,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:08:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:08:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:08:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:08:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:08:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 21:08:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 21:08:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:08:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:08:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:08:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:08:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 21:08:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 21:08:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:08:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:08:33,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686299429] [2020-08-21 21:08:33,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:08:33,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 21:08:33,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482548431] [2020-08-21 21:08:33,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 21:08:33,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:08:33,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 21:08:33,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 21:08:33,948 INFO L87 Difference]: Start difference. First operand 639 states and 751 transitions. Second operand 17 states. [2020-08-21 21:08:34,515 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:34,845 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:35,109 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:35,359 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:36,065 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:08:37,075 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:37,420 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:37,707 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:37,968 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:38,341 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:38,648 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:08:39,254 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-21 21:08:39,824 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-21 21:08:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:08:41,447 INFO L93 Difference]: Finished difference Result 1339 states and 1649 transitions. [2020-08-21 21:08:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 21:08:41,448 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-08-21 21:08:41,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:08:41,453 INFO L225 Difference]: With dead ends: 1339 [2020-08-21 21:08:41,453 INFO L226 Difference]: Without dead ends: 724 [2020-08-21 21:08:41,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 21:08:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2020-08-21 21:08:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 607. [2020-08-21 21:08:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-08-21 21:08:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 700 transitions. [2020-08-21 21:08:41,560 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 700 transitions. Word has length 98 [2020-08-21 21:08:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:08:41,560 INFO L479 AbstractCegarLoop]: Abstraction has 607 states and 700 transitions. [2020-08-21 21:08:41,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 21:08:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 700 transitions. [2020-08-21 21:08:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-21 21:08:41,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:08:41,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:41,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:08:41,564 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:08:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:08:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash 451842310, now seen corresponding path program 1 times [2020-08-21 21:08:41,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:08:41,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935800058] [2020-08-21 21:08:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:08:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:08:41,623 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:08:41,624 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:08:41,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:08:41,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:08:41 BoogieIcfgContainer [2020-08-21 21:08:41,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:08:41,657 INFO L168 Benchmark]: Toolchain (without parser) took 36750.85 ms. Allocated memory was 138.9 MB in the beginning and 682.1 MB in the end (delta: 543.2 MB). Free memory was 100.8 MB in the beginning and 433.4 MB in the end (delta: -332.7 MB). Peak memory consumption was 210.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:08:41,658 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 21:08:41,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 586.19 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.8 MB in the beginning and 169.8 MB in the end (delta: -69.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:08:41,659 INFO L168 Benchmark]: Boogie Preprocessor took 84.91 ms. Allocated memory is still 201.9 MB. Free memory was 169.8 MB in the beginning and 165.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:08:41,660 INFO L168 Benchmark]: RCFGBuilder took 1197.73 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 165.8 MB in the beginning and 196.2 MB in the end (delta: -30.4 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:08:41,661 INFO L168 Benchmark]: TraceAbstraction took 34877.07 ms. Allocated memory was 234.4 MB in the beginning and 682.1 MB in the end (delta: 447.7 MB). Free memory was 196.2 MB in the beginning and 433.4 MB in the end (delta: -237.3 MB). Peak memory consumption was 210.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:08:41,665 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 586.19 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.8 MB in the beginning and 169.8 MB in the end (delta: -69.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.91 ms. Allocated memory is still 201.9 MB. Free memory was 169.8 MB in the beginning and 165.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1197.73 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 165.8 MB in the beginning and 196.2 MB in the end (delta: -30.4 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 34877.07 ms. Allocated memory was 234.4 MB in the beginning and 682.1 MB in the end (delta: 447.7 MB). Free memory was 196.2 MB in the beginning and 433.4 MB in the end (delta: -237.3 MB). Peak memory consumption was 210.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 764]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L413] int waterLevel = 1; [L414] int methaneLevelCritical = 0; [L581] int pumpRunning = 0; [L582] int systemActive = 1; [L833] int cleanupTimeShifts = 4; [L906] int retValue_acc ; [L907] int tmp ; [L911] FCALL select_helpers() [L912] FCALL select_features() [L913] CALL, EXPR valid_product() [L824] int retValue_acc ; [L827] retValue_acc = 1 [L828] return (retValue_acc); [L913] RET, EXPR valid_product() [L913] tmp = valid_product() [L915] COND TRUE \read(tmp) [L917] FCALL setup() [L918] CALL runTest() [L900] CALL test() [L511] int splverifierCounter ; [L512] int tmp ; [L513] int tmp___0 ; [L514] int tmp___1 ; [L515] int tmp___2 ; [L518] splverifierCounter = 0 [L520] COND TRUE 1 [L522] COND TRUE splverifierCounter < 4 [L528] tmp = __VERIFIER_nondet_int() [L530] COND TRUE \read(tmp) [L532] CALL waterRise() [L431] COND TRUE waterLevel < 2 [L432] waterLevel = waterLevel + 1 [L532] RET waterRise() [L538] tmp___0 = __VERIFIER_nondet_int() [L540] COND FALSE !(\read(tmp___0)) [L548] tmp___2 = __VERIFIER_nondet_int() [L550] COND FALSE !(\read(tmp___2)) [L556] tmp___1 = __VERIFIER_nondet_int() [L558] COND TRUE \read(tmp___1) [L565] CALL timeShift() [L589] COND FALSE !(\read(pumpRunning)) [L596] COND TRUE \read(systemActive) [L598] CALL processEnvironment() [L618] int tmp ; [L621] COND TRUE ! pumpRunning [L623] CALL, EXPR isHighWaterLevel() [L733] int retValue_acc ; [L734] int tmp ; [L735] int tmp___0 ; [L739] CALL, EXPR isHighWaterSensorDry() [L493] int retValue_acc ; [L496] COND FALSE !(waterLevel < 2) [L500] retValue_acc = 0 [L501] return (retValue_acc); [L739] RET, EXPR isHighWaterSensorDry() [L739] tmp = isHighWaterSensorDry() [L741] COND FALSE !(\read(tmp)) [L744] tmp___0 = 1 [L746] retValue_acc = tmp___0 [L747] return (retValue_acc); [L623] RET, EXPR isHighWaterLevel() [L623] tmp = isHighWaterLevel() [L625] COND TRUE \read(tmp) [L627] CALL activatePump() [L652] int tmp ; [L656] CALL, EXPR isMethaneAlarm() [L677] int retValue_acc ; [L681] CALL, EXPR isMethaneLevelCritical() [L452] int retValue_acc ; [L455] retValue_acc = methaneLevelCritical [L456] return (retValue_acc); [L681] RET, EXPR isMethaneLevelCritical() [L681] retValue_acc = isMethaneLevelCritical() [L683] return (retValue_acc); [L656] RET, EXPR isMethaneAlarm() [L656] tmp = isMethaneAlarm() [L658] COND FALSE !(\read(tmp)) [L662] CALL activatePump__wrappee__highWaterSensor() [L646] pumpRunning = 1 [L662] RET activatePump__wrappee__highWaterSensor() [L627] RET activatePump() [L598] RET processEnvironment() [L604] CALL __utac_acc__Specification1_spec__1() [L770] int tmp ; [L771] int tmp___0 ; [L775] CALL, EXPR isMethaneLevelCritical() [L452] int retValue_acc ; [L455] retValue_acc = methaneLevelCritical [L456] return (retValue_acc); [L775] RET, EXPR isMethaneLevelCritical() [L775] tmp = isMethaneLevelCritical() [L777] COND FALSE !(\read(tmp)) [L604] RET __utac_acc__Specification1_spec__1() [L565] RET timeShift() [L520] COND TRUE 1 [L522] COND TRUE splverifierCounter < 4 [L528] tmp = __VERIFIER_nondet_int() [L530] COND FALSE !(\read(tmp)) [L538] tmp___0 = __VERIFIER_nondet_int() [L540] COND TRUE \read(tmp___0) [L542] CALL changeMethaneLevel() [L443] COND FALSE !(\read(methaneLevelCritical)) [L446] methaneLevelCritical = 1 [L542] RET changeMethaneLevel() [L548] tmp___2 = __VERIFIER_nondet_int() [L550] COND FALSE !(\read(tmp___2)) [L556] tmp___1 = __VERIFIER_nondet_int() [L558] COND TRUE \read(tmp___1) [L565] CALL timeShift() [L589] COND TRUE \read(pumpRunning) [L591] CALL lowerWaterLevel() [L419] COND TRUE waterLevel > 0 [L420] waterLevel = waterLevel - 1 [L591] RET lowerWaterLevel() [L596] COND TRUE \read(systemActive) [L598] CALL processEnvironment() [L618] int tmp ; [L621] COND FALSE !(! pumpRunning) [L636] FCALL processEnvironment__wrappee__base() [L598] RET processEnvironment() [L604] CALL __utac_acc__Specification1_spec__1() [L770] int tmp ; [L771] int tmp___0 ; [L775] CALL, EXPR isMethaneLevelCritical() [L452] int retValue_acc ; [L455] retValue_acc = methaneLevelCritical [L456] return (retValue_acc); [L775] RET, EXPR isMethaneLevelCritical() [L775] tmp = isMethaneLevelCritical() [L777] COND TRUE \read(tmp) [L779] CALL, EXPR isPumpRunning() [L688] int retValue_acc ; [L691] retValue_acc = pumpRunning [L692] return (retValue_acc); [L779] RET, EXPR isPumpRunning() [L779] tmp___0 = isPumpRunning() [L781] COND TRUE \read(tmp___0) [L783] CALL __automaton_fail() [L764] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 226 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 34.7s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 29.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1191 SDtfs, 2362 SDslu, 1386 SDs, 0 SdLazy, 6747 SolverSat, 1615 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 398 GetRequests, 263 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=639occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 10 MinimizatonAttempts, 748 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 871 NumberOfCodeBlocks, 871 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 727 ConstructedInterpolants, 0 QuantifiedInterpolants, 233536 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 9 PerfectInterpolantSequences, 10/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...