/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_spec3_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:08:46,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:08:46,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:08:46,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:08:46,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:08:46,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:08:46,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:08:46,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:08:46,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:08:46,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:08:46,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:08:46,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:08:46,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:08:46,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:08:46,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:08:46,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:08:46,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:08:46,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:08:46,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:08:46,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:08:46,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:08:46,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:08:46,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:08:46,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:08:46,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:08:46,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:08:46,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:08:46,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:08:46,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:08:46,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:08:46,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:08:46,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:08:46,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:08:46,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:08:46,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:08:46,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:08:46,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:08:46,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:08:46,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:08:46,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:08:46,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:08:46,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:08:46,433 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:08:46,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:08:46,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:08:46,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:08:46,435 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:08:46,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:08:46,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:08:46,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:08:46,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:08:46,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:08:46,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:08:46,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:08:46,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:08:46,437 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:08:46,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:08:46,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:08:46,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:08:46,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:08:46,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:08:46,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:08:46,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:08:46,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:08:46,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:08:46,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:08:46,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:08:46,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:08:46,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:08:46,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:08:46,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:08:46,440 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 [2020-08-21 13:08:46,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:08:46,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:08:46,772 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:08:46,774 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:08:46,774 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:08:46,775 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product19.cil.c [2020-08-21 13:08:46,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/273ece13c/a83a21fca190481dbf14f6042861081c/FLAG7c04ce4a7 [2020-08-21 13:08:47,365 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:08:47,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product19.cil.c [2020-08-21 13:08:47,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/273ece13c/a83a21fca190481dbf14f6042861081c/FLAG7c04ce4a7 [2020-08-21 13:08:47,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/273ece13c/a83a21fca190481dbf14f6042861081c [2020-08-21 13:08:47,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:08:47,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:08:47,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:08:47,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:08:47,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:08:47,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:08:47" (1/1) ... [2020-08-21 13:08:47,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:47, skipping insertion in model container [2020-08-21 13:08:47,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:08:47" (1/1) ... [2020-08-21 13:08:47,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:08:47,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:08:48,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:08:48,120 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:08:48,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:08:48,360 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:08:48,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48 WrapperNode [2020-08-21 13:08:48,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:08:48,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:08:48,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:08:48,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:08:48,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (1/1) ... [2020-08-21 13:08:48,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (1/1) ... [2020-08-21 13:08:48,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (1/1) ... [2020-08-21 13:08:48,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (1/1) ... [2020-08-21 13:08:48,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (1/1) ... [2020-08-21 13:08:48,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (1/1) ... [2020-08-21 13:08:48,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (1/1) ... [2020-08-21 13:08:48,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:08:48,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:08:48,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:08:48,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:08:48,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:08:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:08:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:08:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 13:08:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 13:08:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 13:08:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 13:08:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 13:08:48,528 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 13:08:48,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-21 13:08:48,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 13:08:48,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 13:08:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 13:08:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 13:08:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 13:08:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 13:08:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 13:08:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 13:08:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 13:08:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 13:08:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:08:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 13:08:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 13:08:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 13:08:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 13:08:48,533 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 13:08:48,534 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 13:08:48,534 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 13:08:48,534 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 13:08:48,534 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 13:08:48,534 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 13:08:48,535 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 13:08:48,535 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 13:08:48,535 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 13:08:48,535 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 13:08:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 13:08:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 13:08:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 13:08:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 13:08:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:08:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:08:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 13:08:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 13:08:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 13:08:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 13:08:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 13:08:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 13:08:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 13:08:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 13:08:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 13:08:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-21 13:08:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 13:08:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 13:08:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 13:08:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 13:08:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 13:08:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 13:08:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 13:08:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 13:08:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 13:08:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:08:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 13:08:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 13:08:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 13:08:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 13:08:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 13:08:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:08:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 13:08:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 13:08:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 13:08:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 13:08:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 13:08:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 13:08:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 13:08:48,544 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 13:08:48,544 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 13:08:48,544 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 13:08:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:08:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 13:08:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 13:08:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 13:08:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 13:08:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 13:08:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 13:08:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 13:08:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 13:08:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 13:08:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 13:08:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:08:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 13:08:48,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:08:49,713 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:08:49,714 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 13:08:49,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:08:49 BoogieIcfgContainer [2020-08-21 13:08:49,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:08:49,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:08:49,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:08:49,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:08:49,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:08:47" (1/3) ... [2020-08-21 13:08:49,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b6aad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:08:49, skipping insertion in model container [2020-08-21 13:08:49,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:08:48" (2/3) ... [2020-08-21 13:08:49,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b6aad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:08:49, skipping insertion in model container [2020-08-21 13:08:49,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:08:49" (3/3) ... [2020-08-21 13:08:49,732 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product19.cil.c [2020-08-21 13:08:49,743 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:08:49,752 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:08:49,769 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:08:49,804 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:08:49,804 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:08:49,804 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:08:49,805 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:08:49,805 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:08:49,805 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:08:49,805 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:08:49,806 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:08:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2020-08-21 13:08:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 13:08:49,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:08:49,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:08:49,841 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:08:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:08:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash 506531791, now seen corresponding path program 1 times [2020-08-21 13:08:49,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:08:49,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058577425] [2020-08-21 13:08:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:08:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,459 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 13:08:50,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:08:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:08:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:08:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:08:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:08:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:08:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 13:08:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 13:08:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:08:50,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058577425] [2020-08-21 13:08:50,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:08:50,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:08:50,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561001470] [2020-08-21 13:08:50,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:08:50,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:08:50,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:08:50,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:08:50,592 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 3 states. [2020-08-21 13:08:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:08:51,688 INFO L93 Difference]: Finished difference Result 273 states and 360 transitions. [2020-08-21 13:08:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:08:51,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 13:08:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:08:51,704 INFO L225 Difference]: With dead ends: 273 [2020-08-21 13:08:51,705 INFO L226 Difference]: Without dead ends: 148 [2020-08-21 13:08:51,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:08:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-21 13:08:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-08-21 13:08:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-08-21 13:08:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2020-08-21 13:08:51,798 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 52 [2020-08-21 13:08:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:08:51,798 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2020-08-21 13:08:51,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:08:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2020-08-21 13:08:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 13:08:51,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:08:51,802 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] [2020-08-21 13:08:51,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:08:51,803 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:08:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:08:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1226284601, now seen corresponding path program 1 times [2020-08-21 13:08:51,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:08:51,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708916666] [2020-08-21 13:08:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:08:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,120 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 13:08:52,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:08:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:08:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:08:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:08:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:08:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:08:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 13:08:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 13:08:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:08:52,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708916666] [2020-08-21 13:08:52,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:08:52,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:08:52,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112110112] [2020-08-21 13:08:52,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:08:52,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:08:52,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:08:52,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:08:52,186 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand 4 states. [2020-08-21 13:08:52,623 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 13:08:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:08:53,263 INFO L93 Difference]: Finished difference Result 200 states and 243 transitions. [2020-08-21 13:08:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:08:53,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-21 13:08:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:08:53,267 INFO L225 Difference]: With dead ends: 200 [2020-08-21 13:08:53,267 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 13:08:53,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:08:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 13:08:53,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2020-08-21 13:08:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 13:08:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2020-08-21 13:08:53,324 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 53 [2020-08-21 13:08:53,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:08:53,325 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2020-08-21 13:08:53,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:08:53,325 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2020-08-21 13:08:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 13:08:53,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:08:53,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:08:53,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:08:53,328 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:08:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:08:53,328 INFO L82 PathProgramCache]: Analyzing trace with hash -860632419, now seen corresponding path program 1 times [2020-08-21 13:08:53,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:08:53,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328725590] [2020-08-21 13:08:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:08:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,708 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 13:08:53,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:08:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:08:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:08:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:08:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:08:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:08:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 13:08:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 13:08:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:08:53,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328725590] [2020-08-21 13:08:53,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:08:53,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 13:08:53,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800729940] [2020-08-21 13:08:53,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:08:53,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:08:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:08:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:08:53,836 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand 8 states. [2020-08-21 13:08:54,247 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 13:08:54,601 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 13:08:54,860 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 13:08:55,104 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 13:08:55,882 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 13:08:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:08:57,436 INFO L93 Difference]: Finished difference Result 375 states and 465 transitions. [2020-08-21 13:08:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:08:57,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 13:08:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:08:57,440 INFO L225 Difference]: With dead ends: 375 [2020-08-21 13:08:57,441 INFO L226 Difference]: Without dead ends: 292 [2020-08-21 13:08:57,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:08:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-21 13:08:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 238. [2020-08-21 13:08:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-08-21 13:08:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 287 transitions. [2020-08-21 13:08:57,515 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 287 transitions. Word has length 57 [2020-08-21 13:08:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:08:57,515 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 287 transitions. [2020-08-21 13:08:57,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:08:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 287 transitions. [2020-08-21 13:08:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 13:08:57,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:08:57,519 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] [2020-08-21 13:08:57,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:08:57,519 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:08:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:08:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash -792004887, now seen corresponding path program 1 times [2020-08-21 13:08:57,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:08:57,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766210264] [2020-08-21 13:08:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:08:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,826 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 13:08:57,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:08:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:08:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:08:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:08:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:08:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:08:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 13:08:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 13:08:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 13:08:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:08:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:08:57,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766210264] [2020-08-21 13:08:57,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:08:57,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 13:08:57,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215569548] [2020-08-21 13:08:57,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:08:57,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:08:57,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:08:57,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:08:57,921 INFO L87 Difference]: Start difference. First operand 238 states and 287 transitions. Second operand 8 states. [2020-08-21 13:08:58,323 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 13:08:59,601 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 13:08:59,933 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 13:09:00,194 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 13:09:00,443 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 13:09:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:09:01,044 INFO L93 Difference]: Finished difference Result 726 states and 953 transitions. [2020-08-21 13:09:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:09:01,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-21 13:09:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:09:01,053 INFO L225 Difference]: With dead ends: 726 [2020-08-21 13:09:01,053 INFO L226 Difference]: Without dead ends: 512 [2020-08-21 13:09:01,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:09:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-08-21 13:09:01,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 449. [2020-08-21 13:09:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-08-21 13:09:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 555 transitions. [2020-08-21 13:09:01,188 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 555 transitions. Word has length 63 [2020-08-21 13:09:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:09:01,188 INFO L479 AbstractCegarLoop]: Abstraction has 449 states and 555 transitions. [2020-08-21 13:09:01,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:09:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 555 transitions. [2020-08-21 13:09:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 13:09:01,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:09:01,193 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] [2020-08-21 13:09:01,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:09:01,193 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:09:01,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:09:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash -328985137, now seen corresponding path program 1 times [2020-08-21 13:09:01,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:09:01,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310948457] [2020-08-21 13:09:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:09:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,486 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 13:09:01,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:09:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:09:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:09:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:09:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:09:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:09:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 13:09:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:09:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 13:09:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 13:09:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:09:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:09:01,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310948457] [2020-08-21 13:09:01,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:09:01,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:09:01,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357915303] [2020-08-21 13:09:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:09:01,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:09:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:09:01,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:09:01,607 INFO L87 Difference]: Start difference. First operand 449 states and 555 transitions. Second operand 6 states. [2020-08-21 13:09:01,917 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 13:09:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:09:02,551 INFO L93 Difference]: Finished difference Result 761 states and 976 transitions. [2020-08-21 13:09:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:09:02,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-08-21 13:09:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:09:02,555 INFO L225 Difference]: With dead ends: 761 [2020-08-21 13:09:02,556 INFO L226 Difference]: Without dead ends: 336 [2020-08-21 13:09:02,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:09:02,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-08-21 13:09:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 315. [2020-08-21 13:09:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-08-21 13:09:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 366 transitions. [2020-08-21 13:09:02,623 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 366 transitions. Word has length 67 [2020-08-21 13:09:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:09:02,623 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 366 transitions. [2020-08-21 13:09:02,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:09:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 366 transitions. [2020-08-21 13:09:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 13:09:02,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:09:02,626 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] [2020-08-21 13:09:02,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:09:02,626 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:09:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:09:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1802868975, now seen corresponding path program 1 times [2020-08-21 13:09:02,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:09:02,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830191293] [2020-08-21 13:09:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:09:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:09:02,679 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:09:02,679 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:09:02,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:09:02,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:09:02 BoogieIcfgContainer [2020-08-21 13:09:02,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:09:02,727 INFO L168 Benchmark]: Toolchain (without parser) took 15078.04 ms. Allocated memory was 136.3 MB in the beginning and 523.2 MB in the end (delta: 386.9 MB). Free memory was 98.8 MB in the beginning and 487.6 MB in the end (delta: -388.7 MB). Peak memory consumption was 351.6 MB. Max. memory is 7.1 GB. [2020-08-21 13:09:02,728 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:09:02,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.88 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 98.6 MB in the beginning and 170.0 MB in the end (delta: -71.4 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:09:02,730 INFO L168 Benchmark]: Boogie Preprocessor took 83.92 ms. Allocated memory is still 199.8 MB. Free memory was 170.0 MB in the beginning and 166.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:09:02,730 INFO L168 Benchmark]: RCFGBuilder took 1277.19 ms. Allocated memory was 199.8 MB in the beginning and 227.0 MB in the end (delta: 27.3 MB). Free memory was 166.3 MB in the beginning and 197.9 MB in the end (delta: -31.6 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:09:02,731 INFO L168 Benchmark]: TraceAbstraction took 13000.35 ms. Allocated memory was 227.0 MB in the beginning and 523.2 MB in the end (delta: 296.2 MB). Free memory was 196.4 MB in the beginning and 487.6 MB in the end (delta: -291.2 MB). Peak memory consumption was 358.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:09:02,735 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 708.88 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 98.6 MB in the beginning and 170.0 MB in the end (delta: -71.4 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.92 ms. Allocated memory is still 199.8 MB. Free memory was 170.0 MB in the beginning and 166.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1277.19 ms. Allocated memory was 199.8 MB in the beginning and 227.0 MB in the end (delta: 27.3 MB). Free memory was 166.3 MB in the beginning and 197.9 MB in the end (delta: -31.6 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13000.35 ms. Allocated memory was 227.0 MB in the beginning and 523.2 MB in the end (delta: 296.2 MB). Free memory was 196.4 MB in the beginning and 487.6 MB in the end (delta: -291.2 MB). Peak memory consumption was 358.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 44]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L293] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L490] int cleanupTimeShifts = 4; [L594] int waterLevel = 1; [L595] int methaneLevelCritical = 0; [L753] int pumpRunning = 0; [L754] int systemActive = 1; [L568] int retValue_acc ; [L569] int tmp ; [L573] FCALL select_helpers() [L574] FCALL select_features() [L575] CALL, EXPR valid_product() [L78] int retValue_acc ; [L81] retValue_acc = 1 [L82] return (retValue_acc); [L575] RET, EXPR valid_product() [L575] tmp = valid_product() [L577] COND TRUE \read(tmp) [L579] FCALL setup() [L580] CALL runTest() [L562] CALL test() [L685] int splverifierCounter ; [L686] int tmp ; [L687] int tmp___0 ; [L688] int tmp___1 ; [L689] int tmp___2 ; [L692] splverifierCounter = 0 [L694] COND TRUE 1 [L696] COND TRUE splverifierCounter < 4 [L702] tmp = __VERIFIER_nondet_int() [L704] COND TRUE \read(tmp) [L706] CALL waterRise() [L612] COND TRUE waterLevel < 2 [L613] waterLevel = waterLevel + 1 [L706] RET waterRise() [L712] tmp___0 = __VERIFIER_nondet_int() [L714] COND FALSE !(\read(tmp___0)) [L722] tmp___2 = __VERIFIER_nondet_int() [L724] COND FALSE !(\read(tmp___2)) [L728] tmp___1 = __VERIFIER_nondet_int() [L730] COND TRUE \read(tmp___1) [L732] CALL stopSystem() [L908] COND FALSE !(\read(pumpRunning)) [L915] systemActive = 0 [L732] RET stopSystem() [L739] CALL timeShift() [L760] COND FALSE !(\read(pumpRunning)) [L767] COND FALSE !(\read(systemActive)) [L775] CALL __utac_acc__Specification3_spec__1() [L91] int tmp ; [L92] int tmp___0 ; [L93] int tmp___1 ; [L97] CALL, EXPR isMethaneLevelCritical() [L633] int retValue_acc ; [L636] retValue_acc = methaneLevelCritical [L637] return (retValue_acc); [L97] RET, EXPR isMethaneLevelCritical() [L97] tmp = isMethaneLevelCritical() [L99] COND FALSE !(\read(tmp)) [L103] CALL, EXPR getWaterLevel() [L665] int retValue_acc ; [L668] retValue_acc = waterLevel [L669] return (retValue_acc); [L103] RET, EXPR getWaterLevel() [L103] tmp___0 = getWaterLevel() [L105] COND TRUE tmp___0 == 2 [L107] CALL, EXPR isPumpRunning() [L841] int retValue_acc ; [L844] retValue_acc = pumpRunning [L845] return (retValue_acc); [L107] RET, EXPR isPumpRunning() [L107] tmp___1 = isPumpRunning() [L109] COND FALSE !(\read(tmp___1)) [L113] CALL __automaton_fail() [L44] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 223 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 508 SDtfs, 877 SDslu, 356 SDs, 0 SdLazy, 1788 SolverSat, 556 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=449occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 5 MinimizatonAttempts, 195 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 359 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 82182 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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...