/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 10:18:00,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 10:18:00,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 10:18:00,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 10:18:00,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 10:18:00,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 10:18:00,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 10:18:00,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 10:18:00,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 10:18:00,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 10:18:00,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 10:18:00,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 10:18:00,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 10:18:00,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 10:18:00,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 10:18:00,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 10:18:00,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 10:18:00,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 10:18:00,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 10:18:00,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 10:18:00,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 10:18:00,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 10:18:00,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 10:18:00,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 10:18:00,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 10:18:00,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 10:18:00,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 10:18:00,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 10:18:00,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 10:18:00,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 10:18:00,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 10:18:00,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 10:18:00,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 10:18:00,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 10:18:00,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 10:18:00,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 10:18:00,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 10:18:00,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 10:18:00,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 10:18:00,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 10:18:00,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 10:18:00,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 10:18:00,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 10:18:00,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 10:18:00,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 10:18:00,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 10:18:00,480 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 10:18:00,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 10:18:00,480 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 10:18:00,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 10:18:00,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 10:18:00,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 10:18:00,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 10:18:00,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 10:18:00,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 10:18:00,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 10:18:00,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 10:18:00,482 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 10:18:00,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 10:18:00,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 10:18:00,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 10:18:00,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 10:18:00,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 10:18:00,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:18:00,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 10:18:00,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 10:18:00,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 10:18:00,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 10:18:00,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 10:18:00,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 10:18:00,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 10:18:00,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 10:18:00,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 10:18:00,858 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 10:18:00,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 10:18:00,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 10:18:00,864 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 10:18:00,865 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-08-18 10:18:00,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2c34559d/9fef34868f7a4a7da9dd313886a818af/FLAG7265b2475 [2020-08-18 10:18:01,504 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 10:18:01,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-08-18 10:18:01,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2c34559d/9fef34868f7a4a7da9dd313886a818af/FLAG7265b2475 [2020-08-18 10:18:01,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2c34559d/9fef34868f7a4a7da9dd313886a818af [2020-08-18 10:18:01,793 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 10:18:01,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 10:18:01,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 10:18:01,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 10:18:01,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 10:18:01,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:18:01" (1/1) ... [2020-08-18 10:18:01,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d733b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:01, skipping insertion in model container [2020-08-18 10:18:01,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:18:01" (1/1) ... [2020-08-18 10:18:01,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 10:18:01,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 10:18:02,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:18:02,298 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 10:18:02,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:18:02,416 INFO L208 MainTranslator]: Completed translation [2020-08-18 10:18:02,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02 WrapperNode [2020-08-18 10:18:02,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 10:18:02,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 10:18:02,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 10:18:02,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 10:18:02,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (1/1) ... [2020-08-18 10:18:02,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (1/1) ... [2020-08-18 10:18:02,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (1/1) ... [2020-08-18 10:18:02,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (1/1) ... [2020-08-18 10:18:02,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (1/1) ... [2020-08-18 10:18:02,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (1/1) ... [2020-08-18 10:18:02,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (1/1) ... [2020-08-18 10:18:02,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 10:18:02,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 10:18:02,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 10:18:02,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 10:18:02,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:18:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 10:18:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 10:18:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 10:18:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 10:18:02,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 10:18:02,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 10:18:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 10:18:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 10:18:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 10:18:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 10:18:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 10:18:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 10:18:02,603 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 10:18:02,603 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 10:18:02,603 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 10:18:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 10:18:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 10:18:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 10:18:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 10:18:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 10:18:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-18 10:18:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 10:18:02,605 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 10:18:02,605 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 10:18:02,605 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 10:18:02,606 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 10:18:02,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 10:18:02,606 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 10:18:02,606 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 10:18:02,606 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 10:18:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 10:18:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 10:18:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 10:18:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 10:18:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 10:18:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 10:18:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 10:18:02,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 10:18:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 10:18:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 10:18:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 10:18:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 10:18:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 10:18:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 10:18:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 10:18:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 10:18:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 10:18:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 10:18:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 10:18:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 10:18:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 10:18:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 10:18:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 10:18:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 10:18:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 10:18:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 10:18:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 10:18:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 10:18:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 10:18:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 10:18:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 10:18:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 10:18:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 10:18:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 10:18:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 10:18:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 10:18:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 10:18:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 10:18:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 10:18:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 10:18:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 10:18:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 10:18:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 10:18:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 10:18:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 10:18:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 10:18:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-18 10:18:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 10:18:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 10:18:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 10:18:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 10:18:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 10:18:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 10:18:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 10:18:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 10:18:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 10:18:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 10:18:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 10:18:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 10:18:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 10:18:03,671 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 10:18:03,671 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 10:18:03,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:18:03 BoogieIcfgContainer [2020-08-18 10:18:03,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 10:18:03,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 10:18:03,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 10:18:03,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 10:18:03,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:18:01" (1/3) ... [2020-08-18 10:18:03,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd06c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:18:03, skipping insertion in model container [2020-08-18 10:18:03,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:02" (2/3) ... [2020-08-18 10:18:03,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd06c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:18:03, skipping insertion in model container [2020-08-18 10:18:03,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:18:03" (3/3) ... [2020-08-18 10:18:03,685 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product41.cil.c [2020-08-18 10:18:03,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 10:18:03,704 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 10:18:03,718 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 10:18:03,742 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 10:18:03,742 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 10:18:03,742 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 10:18:03,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 10:18:03,743 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 10:18:03,743 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 10:18:03,743 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 10:18:03,743 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 10:18:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-08-18 10:18:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 10:18:03,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:03,775 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] [2020-08-18 10:18:03,776 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1904787813, now seen corresponding path program 1 times [2020-08-18 10:18:03,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:03,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392840272] [2020-08-18 10:18:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:04,381 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:04,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:04,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:04,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:04,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:04,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 10:18:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:04,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 10:18:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:04,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392840272] [2020-08-18 10:18:04,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:04,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 10:18:04,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783501096] [2020-08-18 10:18:04,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 10:18:04,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:04,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 10:18:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 10:18:04,508 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 3 states. [2020-08-18 10:18:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:05,526 INFO L93 Difference]: Finished difference Result 275 states and 361 transitions. [2020-08-18 10:18:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 10:18:05,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 10:18:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:05,543 INFO L225 Difference]: With dead ends: 275 [2020-08-18 10:18:05,543 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 10:18:05,548 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 [2020-08-18 10:18:05,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 10:18:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2020-08-18 10:18:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-18 10:18:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-08-18 10:18:05,645 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 46 [2020-08-18 10:18:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:05,646 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-08-18 10:18:05,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 10:18:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-08-18 10:18:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 10:18:05,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:05,652 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] [2020-08-18 10:18:05,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 10:18:05,652 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash -8679295, now seen corresponding path program 1 times [2020-08-18 10:18:05,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:05,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943162511] [2020-08-18 10:18:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:06,038 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:06,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:06,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:06,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:06,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:06,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 10:18:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:06,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 10:18:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:06,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943162511] [2020-08-18 10:18:06,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:06,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:18:06,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420226093] [2020-08-18 10:18:06,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:18:06,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:18:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:18:06,092 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 4 states. [2020-08-18 10:18:06,546 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:07,262 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2020-08-18 10:18:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 10:18:07,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 10:18:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:07,266 INFO L225 Difference]: With dead ends: 208 [2020-08-18 10:18:07,266 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 10:18:07,268 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 [2020-08-18 10:18:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 10:18:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-08-18 10:18:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 10:18:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-08-18 10:18:07,304 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 47 [2020-08-18 10:18:07,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:07,304 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-08-18 10:18:07,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:18:07,304 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-08-18 10:18:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 10:18:07,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:07,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:18:07,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 10:18:07,307 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:07,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1364944070, now seen corresponding path program 1 times [2020-08-18 10:18:07,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:07,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102764768] [2020-08-18 10:18:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:07,611 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:07,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:07,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:07,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:07,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:07,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:07,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 10:18:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:07,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 10:18:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:07,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102764768] [2020-08-18 10:18:07,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:07,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 10:18:07,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500305290] [2020-08-18 10:18:07,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 10:18:07,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:07,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 10:18:07,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 10:18:07,715 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 8 states. [2020-08-18 10:18:08,054 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:08,354 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:08,584 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:08,814 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:09,846 INFO L93 Difference]: Finished difference Result 217 states and 266 transitions. [2020-08-18 10:18:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 10:18:09,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 10:18:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:09,853 INFO L225 Difference]: With dead ends: 217 [2020-08-18 10:18:09,853 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 10:18:09,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 10:18:09,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 10:18:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-08-18 10:18:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 10:18:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-08-18 10:18:09,885 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 51 [2020-08-18 10:18:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:09,886 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-08-18 10:18:09,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 10:18:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-08-18 10:18:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 10:18:09,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:09,888 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] [2020-08-18 10:18:09,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 10:18:09,889 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1317252167, now seen corresponding path program 1 times [2020-08-18 10:18:09,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:09,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868357613] [2020-08-18 10:18:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,195 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:10,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 10:18:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 10:18:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 10:18:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:10,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868357613] [2020-08-18 10:18:10,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:10,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 10:18:10,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233917414] [2020-08-18 10:18:10,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 10:18:10,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:10,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 10:18:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 10:18:10,277 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 6 states. [2020-08-18 10:18:10,589 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:11,657 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:12,142 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2020-08-18 10:18:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 10:18:12,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-18 10:18:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:12,146 INFO L225 Difference]: With dead ends: 300 [2020-08-18 10:18:12,147 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 10:18:12,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-18 10:18:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 10:18:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2020-08-18 10:18:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-08-18 10:18:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2020-08-18 10:18:12,198 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 59 [2020-08-18 10:18:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:12,198 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2020-08-18 10:18:12,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 10:18:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2020-08-18 10:18:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 10:18:12,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:12,200 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] [2020-08-18 10:18:12,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 10:18:12,201 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash 19293366, now seen corresponding path program 1 times [2020-08-18 10:18:12,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:12,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440349075] [2020-08-18 10:18:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,470 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:12,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 10:18:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:18:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 10:18:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 10:18:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:12,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440349075] [2020-08-18 10:18:12,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:12,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 10:18:12,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834300856] [2020-08-18 10:18:12,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 10:18:12,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 10:18:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 10:18:12,618 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 8 states. [2020-08-18 10:18:12,999 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:13,939 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:14,272 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:14,787 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:15,024 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:15,296 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:15,963 INFO L93 Difference]: Finished difference Result 520 states and 648 transitions. [2020-08-18 10:18:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 10:18:15,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-18 10:18:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:15,969 INFO L225 Difference]: With dead ends: 520 [2020-08-18 10:18:15,969 INFO L226 Difference]: Without dead ends: 369 [2020-08-18 10:18:15,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 10:18:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-08-18 10:18:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 305. [2020-08-18 10:18:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-18 10:18:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 352 transitions. [2020-08-18 10:18:16,041 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 352 transitions. Word has length 73 [2020-08-18 10:18:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:16,042 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 352 transitions. [2020-08-18 10:18:16,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 10:18:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 352 transitions. [2020-08-18 10:18:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 10:18:16,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:16,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:18:16,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 10:18:16,045 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash -989642822, now seen corresponding path program 1 times [2020-08-18 10:18:16,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:16,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717626696] [2020-08-18 10:18:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,327 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:18:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 10:18:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:18:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 10:18:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 10:18:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:16,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717626696] [2020-08-18 10:18:16,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:16,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 10:18:16,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092406526] [2020-08-18 10:18:16,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 10:18:16,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:16,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 10:18:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 10:18:16,433 INFO L87 Difference]: Start difference. First operand 305 states and 352 transitions. Second operand 9 states. [2020-08-18 10:18:16,814 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:17,848 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:18,094 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:18,783 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:19,031 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:19,260 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:19,402 INFO L93 Difference]: Finished difference Result 408 states and 516 transitions. [2020-08-18 10:18:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 10:18:19,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-08-18 10:18:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:19,407 INFO L225 Difference]: With dead ends: 408 [2020-08-18 10:18:19,407 INFO L226 Difference]: Without dead ends: 405 [2020-08-18 10:18:19,408 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 [2020-08-18 10:18:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-08-18 10:18:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 305. [2020-08-18 10:18:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-18 10:18:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 351 transitions. [2020-08-18 10:18:19,472 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 351 transitions. Word has length 77 [2020-08-18 10:18:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:19,473 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 351 transitions. [2020-08-18 10:18:19,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 10:18:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 351 transitions. [2020-08-18 10:18:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 10:18:19,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:19,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:18:19,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 10:18:19,476 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:19,476 INFO L82 PathProgramCache]: Analyzing trace with hash 636453553, now seen corresponding path program 1 times [2020-08-18 10:18:19,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:19,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752517431] [2020-08-18 10:18:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,730 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:19,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:18:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 10:18:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:18:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 10:18:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 10:18:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 10:18:19,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752517431] [2020-08-18 10:18:19,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:19,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 10:18:19,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007787898] [2020-08-18 10:18:19,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 10:18:19,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:19,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 10:18:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 10:18:19,861 INFO L87 Difference]: Start difference. First operand 305 states and 351 transitions. Second operand 9 states. [2020-08-18 10:18:20,647 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:20,913 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:18:21,140 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:21,359 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:22,203 INFO L93 Difference]: Finished difference Result 694 states and 873 transitions. [2020-08-18 10:18:22,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 10:18:22,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-08-18 10:18:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:22,207 INFO L225 Difference]: With dead ends: 694 [2020-08-18 10:18:22,207 INFO L226 Difference]: Without dead ends: 413 [2020-08-18 10:18:22,209 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 [2020-08-18 10:18:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-18 10:18:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 315. [2020-08-18 10:18:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-08-18 10:18:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 361 transitions. [2020-08-18 10:18:22,273 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 361 transitions. Word has length 93 [2020-08-18 10:18:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:22,273 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 361 transitions. [2020-08-18 10:18:22,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 10:18:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 361 transitions. [2020-08-18 10:18:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 10:18:22,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:22,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:18:22,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 10:18:22,276 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash -260939725, now seen corresponding path program 1 times [2020-08-18 10:18:22,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:22,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548632802] [2020-08-18 10:18:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,569 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:22,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:18:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 10:18:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:18:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 10:18:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 10:18:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 10:18:22,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548632802] [2020-08-18 10:18:22,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:22,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 10:18:22,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175560208] [2020-08-18 10:18:22,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 10:18:22,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:22,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 10:18:22,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 10:18:22,738 INFO L87 Difference]: Start difference. First operand 315 states and 361 transitions. Second operand 11 states. [2020-08-18 10:18:23,397 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:23,639 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:23,871 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:24,445 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:24,719 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:24,978 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:25,963 INFO L93 Difference]: Finished difference Result 714 states and 895 transitions. [2020-08-18 10:18:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 10:18:25,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-08-18 10:18:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:25,967 INFO L225 Difference]: With dead ends: 714 [2020-08-18 10:18:25,967 INFO L226 Difference]: Without dead ends: 423 [2020-08-18 10:18:25,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 10:18:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-08-18 10:18:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 323. [2020-08-18 10:18:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 10:18:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 369 transitions. [2020-08-18 10:18:26,037 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 369 transitions. Word has length 93 [2020-08-18 10:18:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:26,038 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 369 transitions. [2020-08-18 10:18:26,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 10:18:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 369 transitions. [2020-08-18 10:18:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 10:18:26,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:26,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:18:26,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 10:18:26,040 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:26,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1709999732, now seen corresponding path program 1 times [2020-08-18 10:18:26,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:26,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133858877] [2020-08-18 10:18:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,306 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:26,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:18:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 10:18:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:18:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 10:18:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 10:18:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 10:18:26,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133858877] [2020-08-18 10:18:26,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:26,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 10:18:26,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645332257] [2020-08-18 10:18:26,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 10:18:26,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:26,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 10:18:26,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 10:18:26,445 INFO L87 Difference]: Start difference. First operand 323 states and 369 transitions. Second operand 7 states. [2020-08-18 10:18:26,754 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:27,256 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:28,843 INFO L93 Difference]: Finished difference Result 997 states and 1285 transitions. [2020-08-18 10:18:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 10:18:28,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-18 10:18:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:28,850 INFO L225 Difference]: With dead ends: 997 [2020-08-18 10:18:28,850 INFO L226 Difference]: Without dead ends: 698 [2020-08-18 10:18:28,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-18 10:18:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-18 10:18:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 599. [2020-08-18 10:18:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-08-18 10:18:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 711 transitions. [2020-08-18 10:18:28,999 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 711 transitions. Word has length 93 [2020-08-18 10:18:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:28,999 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 711 transitions. [2020-08-18 10:18:28,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 10:18:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 711 transitions. [2020-08-18 10:18:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 10:18:29,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:29,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:18:29,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 10:18:29,002 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1136093798, now seen corresponding path program 1 times [2020-08-18 10:18:29,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:29,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255130035] [2020-08-18 10:18:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,263 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:29,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 10:18:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 10:18:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 10:18:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:18:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 10:18:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 10:18:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 10:18:29,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255130035] [2020-08-18 10:18:29,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:18:29,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 10:18:29,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207957864] [2020-08-18 10:18:29,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 10:18:29,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 10:18:29,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 10:18:29,598 INFO L87 Difference]: Start difference. First operand 599 states and 711 transitions. Second operand 17 states. [2020-08-18 10:18:30,448 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:30,751 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:31,012 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:31,251 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:31,851 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:32,756 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:33,055 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:33,334 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:33,609 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:33,980 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:34,250 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 10:18:34,800 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-18 10:18:35,347 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-18 10:18:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:36,701 INFO L93 Difference]: Finished difference Result 1238 states and 1532 transitions. [2020-08-18 10:18:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 10:18:36,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-08-18 10:18:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:36,706 INFO L225 Difference]: With dead ends: 1238 [2020-08-18 10:18:36,706 INFO L226 Difference]: Without dead ends: 663 [2020-08-18 10:18:36,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 10:18:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-08-18 10:18:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 567. [2020-08-18 10:18:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-08-18 10:18:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 660 transitions. [2020-08-18 10:18:36,811 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 660 transitions. Word has length 97 [2020-08-18 10:18:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:36,811 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 660 transitions. [2020-08-18 10:18:36,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 10:18:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 660 transitions. [2020-08-18 10:18:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 10:18:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:36,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:18:36,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 10:18:36,815 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash 773081915, now seen corresponding path program 1 times [2020-08-18 10:18:36,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:36,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782462123] [2020-08-18 10:18:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 10:18:36,880 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 10:18:36,881 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 10:18:36,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 10:18:36,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:18:36 BoogieIcfgContainer [2020-08-18 10:18:36,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 10:18:36,914 INFO L168 Benchmark]: Toolchain (without parser) took 35119.13 ms. Allocated memory was 138.4 MB in the beginning and 665.3 MB in the end (delta: 526.9 MB). Free memory was 100.3 MB in the beginning and 421.5 MB in the end (delta: -321.2 MB). Peak memory consumption was 205.7 MB. Max. memory is 7.1 GB. [2020-08-18 10:18:36,914 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 10:18:36,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 617.92 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 100.1 MB in the beginning and 164.8 MB in the end (delta: -64.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-18 10:18:36,916 INFO L168 Benchmark]: Boogie Preprocessor took 94.03 ms. Allocated memory is still 199.8 MB. Free memory was 164.8 MB in the beginning and 160.4 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. [2020-08-18 10:18:36,917 INFO L168 Benchmark]: RCFGBuilder took 1165.45 ms. Allocated memory was 199.8 MB in the beginning and 230.7 MB in the end (delta: 30.9 MB). Free memory was 160.4 MB in the beginning and 191.6 MB in the end (delta: -31.2 MB). Peak memory consumption was 82.7 MB. Max. memory is 7.1 GB. [2020-08-18 10:18:36,917 INFO L168 Benchmark]: TraceAbstraction took 33234.01 ms. Allocated memory was 230.7 MB in the beginning and 665.3 MB in the end (delta: 434.6 MB). Free memory was 190.2 MB in the beginning and 421.5 MB in the end (delta: -231.4 MB). Peak memory consumption was 203.3 MB. Max. memory is 7.1 GB. [2020-08-18 10:18:36,920 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 617.92 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 100.1 MB in the beginning and 164.8 MB in the end (delta: -64.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 94.03 ms. Allocated memory is still 199.8 MB. Free memory was 164.8 MB in the beginning and 160.4 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1165.45 ms. Allocated memory was 199.8 MB in the beginning and 230.7 MB in the end (delta: 30.9 MB). Free memory was 160.4 MB in the beginning and 191.6 MB in the end (delta: -31.2 MB). Peak memory consumption was 82.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33234.01 ms. Allocated memory was 230.7 MB in the beginning and 665.3 MB in the end (delta: 434.6 MB). Free memory was 190.2 MB in the beginning and 421.5 MB in the end (delta: -231.4 MB). Peak memory consumption was 203.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 887]: 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; [L480] int waterLevel = 1; [L481] int methaneLevelCritical = 0; [L578] int pumpRunning = 0; [L579] int systemActive = 1; [L749] int cleanupTimeShifts = 4; [L825] int retValue_acc ; [L826] int tmp ; [L830] FCALL select_helpers() [L831] FCALL select_features() [L832] CALL, EXPR valid_product() [L874] int retValue_acc ; [L877] retValue_acc = 1 [L878] return (retValue_acc); [L832] RET, EXPR valid_product() [L832] tmp = valid_product() [L834] COND TRUE \read(tmp) [L836] FCALL setup() [L837] CALL runTest() [L816] CALL test() [L411] int splverifierCounter ; [L412] int tmp ; [L413] int tmp___0 ; [L414] int tmp___1 ; [L415] int tmp___2 ; [L418] splverifierCounter = 0 [L420] COND TRUE 1 [L422] COND TRUE splverifierCounter < 4 [L428] tmp = __VERIFIER_nondet_int() [L430] COND TRUE \read(tmp) [L432] CALL waterRise() [L498] COND TRUE waterLevel < 2 [L499] waterLevel = waterLevel + 1 [L432] RET waterRise() [L438] tmp___0 = __VERIFIER_nondet_int() [L440] COND FALSE !(\read(tmp___0)) [L448] tmp___2 = __VERIFIER_nondet_int() [L450] COND TRUE \read(tmp___2) [L463] CALL timeShift() [L586] COND FALSE !(\read(pumpRunning)) [L593] COND TRUE \read(systemActive) [L595] CALL processEnvironment() [L615] int tmp ; [L618] COND TRUE ! pumpRunning [L620] CALL, EXPR isHighWaterLevel() [L730] int retValue_acc ; [L731] int tmp ; [L732] int tmp___0 ; [L736] CALL, EXPR isHighWaterSensorDry() [L560] int retValue_acc ; [L563] COND FALSE !(waterLevel < 2) [L567] retValue_acc = 0 [L568] return (retValue_acc); [L736] RET, EXPR isHighWaterSensorDry() [L736] tmp = isHighWaterSensorDry() [L738] COND FALSE !(\read(tmp)) [L741] tmp___0 = 1 [L743] retValue_acc = tmp___0 [L744] return (retValue_acc); [L620] RET, EXPR isHighWaterLevel() [L620] tmp = isHighWaterLevel() [L622] COND TRUE \read(tmp) [L624] CALL activatePump() [L649] int tmp ; [L653] CALL, EXPR isMethaneAlarm() [L674] int retValue_acc ; [L678] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L678] RET, EXPR isMethaneLevelCritical() [L678] retValue_acc = isMethaneLevelCritical() [L680] return (retValue_acc); [L653] RET, EXPR isMethaneAlarm() [L653] tmp = isMethaneAlarm() [L655] COND FALSE !(\read(tmp)) [L659] CALL activatePump__wrappee__highWaterSensor() [L643] pumpRunning = 1 [L659] RET activatePump__wrappee__highWaterSensor() [L624] RET activatePump() [L595] RET processEnvironment() [L601] CALL __utac_acc__Specification1_spec__1() [L893] int tmp ; [L894] int tmp___0 ; [L898] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L898] RET, EXPR isMethaneLevelCritical() [L898] tmp = isMethaneLevelCritical() [L900] COND FALSE !(\read(tmp)) [L601] RET __utac_acc__Specification1_spec__1() [L463] RET timeShift() [L420] COND TRUE 1 [L422] COND TRUE splverifierCounter < 4 [L428] tmp = __VERIFIER_nondet_int() [L430] COND FALSE !(\read(tmp)) [L438] tmp___0 = __VERIFIER_nondet_int() [L440] COND TRUE \read(tmp___0) [L442] CALL changeMethaneLevel() [L510] COND FALSE !(\read(methaneLevelCritical)) [L513] methaneLevelCritical = 1 [L442] RET changeMethaneLevel() [L448] tmp___2 = __VERIFIER_nondet_int() [L450] COND TRUE \read(tmp___2) [L463] CALL timeShift() [L586] COND TRUE \read(pumpRunning) [L588] CALL lowerWaterLevel() [L486] COND TRUE waterLevel > 0 [L487] waterLevel = waterLevel - 1 [L588] RET lowerWaterLevel() [L593] COND TRUE \read(systemActive) [L595] CALL processEnvironment() [L615] int tmp ; [L618] COND FALSE !(! pumpRunning) [L633] FCALL processEnvironment__wrappee__base() [L595] RET processEnvironment() [L601] CALL __utac_acc__Specification1_spec__1() [L893] int tmp ; [L894] int tmp___0 ; [L898] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L898] RET, EXPR isMethaneLevelCritical() [L898] tmp = isMethaneLevelCritical() [L900] COND TRUE \read(tmp) [L902] CALL, EXPR isPumpRunning() [L685] int retValue_acc ; [L688] retValue_acc = pumpRunning [L689] return (retValue_acc); [L902] RET, EXPR isPumpRunning() [L902] tmp___0 = isPumpRunning() [L904] COND TRUE \read(tmp___0) [L906] CALL __automaton_fail() [L887] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 222 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 33.1s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 27.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1132 SDtfs, 2290 SDslu, 1323 SDs, 0 SdLazy, 6349 SolverSat, 1428 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 391 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=599occurred 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, 680 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 719 ConstructedInterpolants, 0 QuantifiedInterpolants, 229226 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...