/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product50.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:41:47,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:41:47,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:41:47,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:41:47,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:41:47,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:41:47,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:41:47,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:41:47,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:41:47,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:41:47,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:41:47,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:41:47,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:41:47,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:41:47,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:41:47,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:41:47,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:41:47,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:41:47,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:41:47,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:41:47,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:41:47,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:41:47,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:41:47,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:41:47,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:41:47,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:41:47,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:41:47,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:41:47,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:41:47,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:41:47,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:41:47,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:41:47,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:41:47,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:41:47,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:41:47,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:41:47,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:41:47,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:41:47,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:41:47,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:41:47,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:41:47,253 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 14:41:47,295 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:41:47,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:41:47,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:41:47,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:41:47,298 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:41:47,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:41:47,299 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:41:47,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:41:47,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:41:47,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:41:47,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:41:47,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:41:47,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:41:47,301 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:41:47,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:41:47,302 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:41:47,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:41:47,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:41:47,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:41:47,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:41:47,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:41:47,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:41:47,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:41:47,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:41:47,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:41:47,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:41:47,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:41:47,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:41:47,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:41:47,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:41:47,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:41:47,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:41:47,657 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:41:47,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:41:47,659 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:41:47,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product50.cil.c [2020-08-21 14:41:47,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a73ce8c70/1cd1859a798c4a508363c1a99477ed8e/FLAGc3eb56cda [2020-08-21 14:41:48,247 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:41:48,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product50.cil.c [2020-08-21 14:41:48,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a73ce8c70/1cd1859a798c4a508363c1a99477ed8e/FLAGc3eb56cda [2020-08-21 14:41:48,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a73ce8c70/1cd1859a798c4a508363c1a99477ed8e [2020-08-21 14:41:48,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:41:48,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:41:48,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:41:48,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:41:48,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:41:48,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:41:48" (1/1) ... [2020-08-21 14:41:48,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f51854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:48, skipping insertion in model container [2020-08-21 14:41:48,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:41:48" (1/1) ... [2020-08-21 14:41:48,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:41:48,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:41:49,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:41:49,094 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:41:49,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:41:49,240 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:41:49,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49 WrapperNode [2020-08-21 14:41:49,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:41:49,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:41:49,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:41:49,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:41:49,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:41:49,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:41:49,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:41:49,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:41:49,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (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 14:41:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:41:49,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:41:49,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 14:41:49,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 14:41:49,408 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 14:41:49,408 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 14:41:49,408 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 14:41:49,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 14:41:49,409 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 14:41:49,409 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 14:41:49,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 14:41:49,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 14:41:49,409 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 14:41:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 14:41:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 14:41:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 14:41:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:41:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 14:41:49,410 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 14:41:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 14:41:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 14:41:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 14:41:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 14:41:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 14:41:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 14:41:49,412 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 14:41:49,412 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 14:41:49,412 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 14:41:49,412 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 14:41:49,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 14:41:49,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 14:41:49,413 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 14:41:49,413 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 14:41:49,413 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 14:41:49,413 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 14:41:49,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 14:41:49,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 14:41:49,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 14:41:49,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 14:41:49,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 14:41:49,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 14:41:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:41:49,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:41:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 14:41:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 14:41:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 14:41:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 14:41:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 14:41:49,415 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 14:41:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 14:41:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 14:41:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 14:41:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 14:41:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 14:41:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 14:41:49,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:41:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 14:41:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 14:41:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 14:41:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 14:41:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 14:41:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 14:41:49,417 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 14:41:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 14:41:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 14:41:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 14:41:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:41:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 14:41:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 14:41:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 14:41:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 14:41:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 14:41:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 14:41:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 14:41:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 14:41:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 14:41:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 14:41:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 14:41:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:41:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:41:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 14:41:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:41:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:41:49,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:41:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:41:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 14:41:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:41:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 14:41:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 14:41:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:41:49,421 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 14:41:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 14:41:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 14:41:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:41:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 14:41:49,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:41:50,419 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:41:50,419 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 14:41:50,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:41:50 BoogieIcfgContainer [2020-08-21 14:41:50,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:41:50,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:41:50,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:41:50,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:41:50,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:41:48" (1/3) ... [2020-08-21 14:41:50,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6988454d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:41:50, skipping insertion in model container [2020-08-21 14:41:50,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (2/3) ... [2020-08-21 14:41:50,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6988454d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:41:50, skipping insertion in model container [2020-08-21 14:41:50,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:41:50" (3/3) ... [2020-08-21 14:41:50,434 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product50.cil.c [2020-08-21 14:41:50,445 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:41:50,453 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:41:50,468 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:41:50,493 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:41:50,493 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:41:50,493 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:41:50,493 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:41:50,493 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:41:50,494 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:41:50,494 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:41:50,494 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:41:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states. [2020-08-21 14:41:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 14:41:50,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:50,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:41:50,526 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1040081704, now seen corresponding path program 1 times [2020-08-21 14:41:50,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:50,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182998671] [2020-08-21 14:41:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,252 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:51,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:41:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:41:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,345 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 14:41:51,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182998671] [2020-08-21 14:41:51,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:51,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:41:51,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766456976] [2020-08-21 14:41:51,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:41:51,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:51,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:41:51,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:41:51,375 INFO L87 Difference]: Start difference. First operand 178 states. Second operand 3 states. [2020-08-21 14:41:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:52,566 INFO L93 Difference]: Finished difference Result 306 states and 398 transitions. [2020-08-21 14:41:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:41:52,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 14:41:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:52,582 INFO L225 Difference]: With dead ends: 306 [2020-08-21 14:41:52,583 INFO L226 Difference]: Without dead ends: 165 [2020-08-21 14:41:52,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:41:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-21 14:41:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-08-21 14:41:52,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 14:41:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2020-08-21 14:41:52,674 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 46 [2020-08-21 14:41:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:52,674 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2020-08-21 14:41:52,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:41:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2020-08-21 14:41:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 14:41:52,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:52,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:41:52,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:41:52,679 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash -849158610, now seen corresponding path program 1 times [2020-08-21 14:41:52,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:52,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144719045] [2020-08-21 14:41:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,017 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:53,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:41:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:41:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,107 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 14:41:53,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144719045] [2020-08-21 14:41:53,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:53,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:41:53,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132385301] [2020-08-21 14:41:53,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:41:53,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:53,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:41:53,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:41:53,111 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand 4 states. [2020-08-21 14:41:53,534 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:54,411 INFO L93 Difference]: Finished difference Result 235 states and 285 transitions. [2020-08-21 14:41:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:41:54,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 14:41:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:54,417 INFO L225 Difference]: With dead ends: 235 [2020-08-21 14:41:54,417 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 14:41:54,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:41:54,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 14:41:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2020-08-21 14:41:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 14:41:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-08-21 14:41:54,472 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 47 [2020-08-21 14:41:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:54,472 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-08-21 14:41:54,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:41:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-08-21 14:41:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 14:41:54,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:54,475 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 14:41:54,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:41:54,476 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash 846018297, now seen corresponding path program 1 times [2020-08-21 14:41:54,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:54,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462976752] [2020-08-21 14:41:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:54,801 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:54,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:54,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:54,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:54,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:54,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:54,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:41:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:54,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 14:41:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:54,945 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 14:41:54,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462976752] [2020-08-21 14:41:54,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:54,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:41:54,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485046306] [2020-08-21 14:41:54,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:41:54,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:54,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:41:54,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:41:54,948 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 8 states. [2020-08-21 14:41:55,303 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:55,615 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:55,893 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:56,134 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:57,355 INFO L93 Difference]: Finished difference Result 248 states and 303 transitions. [2020-08-21 14:41:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:41:57,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 14:41:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:57,359 INFO L225 Difference]: With dead ends: 248 [2020-08-21 14:41:57,360 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 14:41:57,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:41:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 14:41:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2020-08-21 14:41:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 14:41:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2020-08-21 14:41:57,393 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 52 [2020-08-21 14:41:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:57,393 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2020-08-21 14:41:57,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:41:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2020-08-21 14:41:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 14:41:57,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:57,395 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] [2020-08-21 14:41:57,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:41:57,396 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:57,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1478840967, now seen corresponding path program 1 times [2020-08-21 14:41:57,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:57,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635099396] [2020-08-21 14:41:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,713 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:57,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 14:41:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:41:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:41:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 14:41:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 14:41:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:57,849 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 14:41:57,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635099396] [2020-08-21 14:41:57,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:57,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:41:57,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671884390] [2020-08-21 14:41:57,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:41:57,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:41:57,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:41:57,853 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand 6 states. [2020-08-21 14:41:58,251 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:59,372 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:00,064 INFO L93 Difference]: Finished difference Result 345 states and 425 transitions. [2020-08-21 14:42:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:42:00,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 14:42:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:00,069 INFO L225 Difference]: With dead ends: 345 [2020-08-21 14:42:00,069 INFO L226 Difference]: Without dead ends: 246 [2020-08-21 14:42:00,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:42:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-08-21 14:42:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2020-08-21 14:42:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-21 14:42:00,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 230 transitions. [2020-08-21 14:42:00,116 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 230 transitions. Word has length 65 [2020-08-21 14:42:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:00,117 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 230 transitions. [2020-08-21 14:42:00,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:42:00,117 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 230 transitions. [2020-08-21 14:42:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 14:42:00,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:00,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:42:00,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:42:00,120 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1284194314, now seen corresponding path program 1 times [2020-08-21 14:42:00,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:00,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209505806] [2020-08-21 14:42:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,391 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:00,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 14:42:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 14:42:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 14:42:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:00,494 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 14:42:00,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209505806] [2020-08-21 14:42:00,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:00,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:42:00,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832822933] [2020-08-21 14:42:00,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:42:00,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:00,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:42:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:42:00,497 INFO L87 Difference]: Start difference. First operand 203 states and 230 transitions. Second operand 8 states. [2020-08-21 14:42:00,946 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:02,073 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:02,355 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:02,575 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:02,783 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:03,062 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:04,106 INFO L93 Difference]: Finished difference Result 607 states and 746 transitions. [2020-08-21 14:42:04,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:42:04,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-08-21 14:42:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:04,115 INFO L225 Difference]: With dead ends: 607 [2020-08-21 14:42:04,115 INFO L226 Difference]: Without dead ends: 428 [2020-08-21 14:42:04,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:42:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-08-21 14:42:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 361. [2020-08-21 14:42:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-08-21 14:42:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 410 transitions. [2020-08-21 14:42:04,194 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 410 transitions. Word has length 79 [2020-08-21 14:42:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:04,195 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 410 transitions. [2020-08-21 14:42:04,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:42:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 410 transitions. [2020-08-21 14:42:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:42:04,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:04,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:42:04,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:42:04,198 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:04,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1377771002, now seen corresponding path program 1 times [2020-08-21 14:42:04,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:04,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466144427] [2020-08-21 14:42:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,482 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:04,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:42:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 14:42:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 14:42:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:04,626 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 14:42:04,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466144427] [2020-08-21 14:42:04,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:04,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:42:04,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864623509] [2020-08-21 14:42:04,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:42:04,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:04,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:42:04,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:42:04,629 INFO L87 Difference]: Start difference. First operand 361 states and 410 transitions. Second operand 9 states. [2020-08-21 14:42:05,004 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:06,098 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:06,310 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:06,563 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:06,834 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:07,105 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:08,104 INFO L93 Difference]: Finished difference Result 470 states and 590 transitions. [2020-08-21 14:42:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:42:08,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-21 14:42:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:08,109 INFO L225 Difference]: With dead ends: 470 [2020-08-21 14:42:08,109 INFO L226 Difference]: Without dead ends: 467 [2020-08-21 14:42:08,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:42:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-08-21 14:42:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 361. [2020-08-21 14:42:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-08-21 14:42:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 409 transitions. [2020-08-21 14:42:08,183 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 409 transitions. Word has length 83 [2020-08-21 14:42:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:08,184 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 409 transitions. [2020-08-21 14:42:08,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:42:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 409 transitions. [2020-08-21 14:42:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 14:42:08,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:08,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:42:08,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:42:08,187 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash 453090503, now seen corresponding path program 1 times [2020-08-21 14:42:08,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:08,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181302303] [2020-08-21 14:42:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,434 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:08,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:42:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:42:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 14:42:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:08,577 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 14:42:08,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181302303] [2020-08-21 14:42:08,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:08,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:42:08,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112421534] [2020-08-21 14:42:08,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:42:08,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:42:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:42:08,586 INFO L87 Difference]: Start difference. First operand 361 states and 409 transitions. Second operand 9 states. [2020-08-21 14:42:09,542 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:09,775 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:42:10,018 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:10,244 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:11,260 INFO L93 Difference]: Finished difference Result 808 states and 990 transitions. [2020-08-21 14:42:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:42:11,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 14:42:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:11,266 INFO L225 Difference]: With dead ends: 808 [2020-08-21 14:42:11,266 INFO L226 Difference]: Without dead ends: 471 [2020-08-21 14:42:11,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:42:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-08-21 14:42:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 371. [2020-08-21 14:42:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-08-21 14:42:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 419 transitions. [2020-08-21 14:42:11,370 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 419 transitions. Word has length 84 [2020-08-21 14:42:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:11,370 INFO L479 AbstractCegarLoop]: Abstraction has 371 states and 419 transitions. [2020-08-21 14:42:11,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:42:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 419 transitions. [2020-08-21 14:42:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 14:42:11,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:11,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:42:11,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:42:11,372 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:11,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:11,373 INFO L82 PathProgramCache]: Analyzing trace with hash 475722757, now seen corresponding path program 1 times [2020-08-21 14:42:11,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:11,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150436618] [2020-08-21 14:42:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,632 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:11,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:42:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:42:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 14:42:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:11,769 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 14:42:11,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150436618] [2020-08-21 14:42:11,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:11,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 14:42:11,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182319413] [2020-08-21 14:42:11,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:42:11,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:42:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:42:11,772 INFO L87 Difference]: Start difference. First operand 371 states and 419 transitions. Second operand 11 states. [2020-08-21 14:42:12,251 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:12,491 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:12,710 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:13,324 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:13,563 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:13,804 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:15,001 INFO L93 Difference]: Finished difference Result 832 states and 1030 transitions. [2020-08-21 14:42:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:42:15,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-08-21 14:42:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:15,008 INFO L225 Difference]: With dead ends: 832 [2020-08-21 14:42:15,008 INFO L226 Difference]: Without dead ends: 485 [2020-08-21 14:42:15,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:42:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-08-21 14:42:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 379. [2020-08-21 14:42:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-08-21 14:42:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 427 transitions. [2020-08-21 14:42:15,089 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 427 transitions. Word has length 84 [2020-08-21 14:42:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:15,089 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 427 transitions. [2020-08-21 14:42:15,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:42:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 427 transitions. [2020-08-21 14:42:15,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 14:42:15,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:15,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:42:15,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:42:15,095 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:15,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1501214756, now seen corresponding path program 1 times [2020-08-21 14:42:15,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:15,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766205712] [2020-08-21 14:42:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,351 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:15,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:42:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:42:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 14:42:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:15,483 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 14:42:15,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766205712] [2020-08-21 14:42:15,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:15,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:42:15,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404326956] [2020-08-21 14:42:15,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:42:15,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:42:15,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:42:15,487 INFO L87 Difference]: Start difference. First operand 379 states and 427 transitions. Second operand 7 states. [2020-08-21 14:42:15,916 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:16,408 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:18,531 INFO L93 Difference]: Finished difference Result 1174 states and 1504 transitions. [2020-08-21 14:42:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:42:18,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-08-21 14:42:18,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:18,538 INFO L225 Difference]: With dead ends: 1174 [2020-08-21 14:42:18,538 INFO L226 Difference]: Without dead ends: 819 [2020-08-21 14:42:18,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:42:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-08-21 14:42:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 699. [2020-08-21 14:42:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2020-08-21 14:42:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 821 transitions. [2020-08-21 14:42:18,678 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 821 transitions. Word has length 84 [2020-08-21 14:42:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:18,681 INFO L479 AbstractCegarLoop]: Abstraction has 699 states and 821 transitions. [2020-08-21 14:42:18,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:42:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 821 transitions. [2020-08-21 14:42:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 14:42:18,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:18,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:42:18,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:42:18,687 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:18,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1300385726, now seen corresponding path program 1 times [2020-08-21 14:42:18,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:18,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008629174] [2020-08-21 14:42:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:42:18,744 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:42:18,744 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:42:18,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:42:18,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:42:18 BoogieIcfgContainer [2020-08-21 14:42:18,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:42:18,792 INFO L168 Benchmark]: Toolchain (without parser) took 30226.23 ms. Allocated memory was 139.5 MB in the beginning and 619.7 MB in the end (delta: 480.2 MB). Free memory was 102.1 MB in the beginning and 466.1 MB in the end (delta: -364.0 MB). Peak memory consumption was 116.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:18,794 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:42:18,799 INFO L168 Benchmark]: CACSL2BoogieTranslator took 676.38 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.9 MB in the beginning and 172.5 MB in the end (delta: -70.6 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:18,800 INFO L168 Benchmark]: Boogie Preprocessor took 105.50 ms. Allocated memory is still 202.9 MB. Free memory was 172.5 MB in the beginning and 167.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:18,801 INFO L168 Benchmark]: RCFGBuilder took 1077.83 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 167.6 MB in the beginning and 197.8 MB in the end (delta: -30.1 MB). Peak memory consumption was 84.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:18,801 INFO L168 Benchmark]: TraceAbstraction took 28361.52 ms. Allocated memory was 235.9 MB in the beginning and 619.7 MB in the end (delta: 383.8 MB). Free memory was 197.8 MB in the beginning and 466.1 MB in the end (delta: -268.4 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:18,804 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 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 676.38 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.9 MB in the beginning and 172.5 MB in the end (delta: -70.6 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.50 ms. Allocated memory is still 202.9 MB. Free memory was 172.5 MB in the beginning and 167.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1077.83 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 167.6 MB in the beginning and 197.8 MB in the end (delta: -30.1 MB). Peak memory consumption was 84.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28361.52 ms. Allocated memory was 235.9 MB in the beginning and 619.7 MB in the end (delta: 383.8 MB). Free memory was 197.8 MB in the beginning and 466.1 MB in the end (delta: -268.4 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 388]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L76] int waterLevel = 1; [L77] int methaneLevelCritical = 0; [L179] int cleanupTimeShifts = 4; [L395] int pumpRunning = 0; [L396] int systemActive = 1; [L769] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L258] int retValue_acc ; [L259] int tmp ; [L263] FCALL select_helpers() [L264] FCALL select_features() [L265] CALL, EXPR valid_product() [L307] int retValue_acc ; [L310] retValue_acc = 1 [L311] return (retValue_acc); [L265] RET, EXPR valid_product() [L265] tmp = valid_product() [L267] COND TRUE \read(tmp) [L269] FCALL setup() [L270] CALL runTest() [L249] CALL test() [L318] int splverifierCounter ; [L319] int tmp ; [L320] int tmp___0 ; [L321] int tmp___1 ; [L322] int tmp___2 ; [L325] splverifierCounter = 0 [L327] COND TRUE 1 [L329] COND TRUE splverifierCounter < 4 [L335] tmp = __VERIFIER_nondet_int() [L337] COND TRUE \read(tmp) [L339] CALL waterRise() [L94] COND TRUE waterLevel < 2 [L95] waterLevel = waterLevel + 1 [L339] RET waterRise() [L345] tmp___0 = __VERIFIER_nondet_int() [L347] COND TRUE \read(tmp___0) [L349] CALL changeMethaneLevel() [L106] COND FALSE !(\read(methaneLevelCritical)) [L109] methaneLevelCritical = 1 [L349] RET changeMethaneLevel() [L355] tmp___2 = __VERIFIER_nondet_int() [L357] COND FALSE !(\read(tmp___2)) [L363] tmp___1 = __VERIFIER_nondet_int() [L365] COND TRUE \read(tmp___1) [L372] CALL timeShift() [L402] COND FALSE !(\read(pumpRunning)) [L409] COND TRUE \read(systemActive) [L411] CALL processEnvironment() [L457] int tmp ; [L460] COND FALSE !(\read(pumpRunning)) [L475] CALL processEnvironment__wrappee__highWaterSensor() [L431] int tmp ; [L434] COND TRUE ! pumpRunning [L436] CALL, EXPR isHighWaterLevel() [L554] int retValue_acc ; [L555] int tmp ; [L556] int tmp___0 ; [L560] CALL, EXPR isHighWaterSensorDry() [L156] int retValue_acc ; [L159] COND FALSE !(waterLevel < 2) [L163] retValue_acc = 0 [L164] return (retValue_acc); [L560] RET, EXPR isHighWaterSensorDry() [L560] tmp = isHighWaterSensorDry() [L562] COND FALSE !(\read(tmp)) [L565] tmp___0 = 1 [L567] retValue_acc = tmp___0 [L568] return (retValue_acc); [L436] RET, EXPR isHighWaterLevel() [L436] tmp = isHighWaterLevel() [L438] COND TRUE \read(tmp) [L440] CALL activatePump() [L485] pumpRunning = 1 [L440] RET activatePump() [L475] RET processEnvironment__wrappee__highWaterSensor() [L411] RET processEnvironment() [L417] CALL __utac_acc__Specification1_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR isMethaneLevelCritical() [L115] int retValue_acc ; [L118] retValue_acc = methaneLevelCritical [L119] return (retValue_acc); [L49] RET, EXPR isMethaneLevelCritical() [L49] tmp = isMethaneLevelCritical() [L51] COND TRUE \read(tmp) [L53] CALL, EXPR isPumpRunning() [L509] int retValue_acc ; [L512] retValue_acc = pumpRunning [L513] return (retValue_acc); [L53] RET, EXPR isPumpRunning() [L53] tmp___0 = isPumpRunning() [L55] COND TRUE \read(tmp___0) [L57] CALL __automaton_fail() [L388] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 239 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.2s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 23.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1085 SDtfs, 1822 SDslu, 985 SDs, 0 SdLazy, 5118 SolverSat, 1183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 222 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=699occurred 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: 0.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 627 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 712 NumberOfCodeBlocks, 712 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 615 ConstructedInterpolants, 0 QuantifiedInterpolants, 190976 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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...