/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:54:57,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:54:57,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:54:57,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:54:57,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:54:57,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:54:57,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:54:57,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:54:57,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:54:57,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:54:57,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:54:57,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:54:57,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:54:57,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:54:57,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:54:57,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:54:57,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:54:57,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:54:57,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:54:57,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:54:57,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:54:57,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:54:57,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:54:57,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:54:57,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:54:57,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:54:57,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:54:57,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:54:57,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:54:57,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:54:57,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:54:57,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:54:57,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:54:57,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:54:57,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:54:57,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:54:57,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:54:57,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:54:57,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:54:57,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:54:57,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:54:57,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:54:57,225 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:54:57,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:54:57,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:54:57,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:54:57,231 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:54:57,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:54:57,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:54:57,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:54:57,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:54:57,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:54:57,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:54:57,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:54:57,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:54:57,235 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:54:57,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:54:57,235 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:54:57,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:54:57,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:54:57,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:54:57,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:54:57,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:54:57,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:54:57,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:54:57,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:54:57,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:54:57,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:54:57,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:54:57,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:54:57,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:54:57,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 11:54:57,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:54:57,576 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:54:57,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:54:57,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:54:57,583 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:54:57,585 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c [2020-08-18 11:54:57,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8f912341/6ea09c410bac4f5c87e4b95a7309d3e2/FLAG39daf320d [2020-08-18 11:54:58,141 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:54:58,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product55.cil.c [2020-08-18 11:54:58,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8f912341/6ea09c410bac4f5c87e4b95a7309d3e2/FLAG39daf320d [2020-08-18 11:54:58,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8f912341/6ea09c410bac4f5c87e4b95a7309d3e2 [2020-08-18 11:54:58,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:54:58,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:54:58,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:54:58,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:54:58,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:54:58,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:54:58" (1/1) ... [2020-08-18 11:54:58,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccd9af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:58, skipping insertion in model container [2020-08-18 11:54:58,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:54:58" (1/1) ... [2020-08-18 11:54:58,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:54:58,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:54:59,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:54:59,051 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:54:59,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:54:59,196 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:54:59,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59 WrapperNode [2020-08-18 11:54:59,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:54:59,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:54:59,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:54:59,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:54:59,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (1/1) ... [2020-08-18 11:54:59,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (1/1) ... [2020-08-18 11:54:59,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (1/1) ... [2020-08-18 11:54:59,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (1/1) ... [2020-08-18 11:54:59,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (1/1) ... [2020-08-18 11:54:59,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (1/1) ... [2020-08-18 11:54:59,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (1/1) ... [2020-08-18 11:54:59,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:54:59,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:54:59,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:54:59,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:54:59,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:54:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:54:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:54:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 11:54:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 11:54:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 11:54:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 11:54:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 11:54:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 11:54:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 11:54:59,376 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 11:54:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 11:54:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 11:54:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 11:54:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 11:54:59,377 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 11:54:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 11:54:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 11:54:59,378 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 11:54:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 11:54:59,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 11:54:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 11:54:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 11:54:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 11:54:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 11:54:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 11:54:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 11:54:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 11:54:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 11:54:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 11:54:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 11:54:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 11:54:59,382 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 11:54:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 11:54:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 11:54:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:54:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 11:54:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 11:54:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 11:54:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 11:54:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 11:54:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 11:54:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 11:54:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:54:59,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:54:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 11:54:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 11:54:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 11:54:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 11:54:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 11:54:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 11:54:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 11:54:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 11:54:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 11:54:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 11:54:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 11:54:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 11:54:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 11:54:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 11:54:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 11:54:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 11:54:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 11:54:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 11:54:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 11:54:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 11:54:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 11:54:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 11:54:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 11:54:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 11:54:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 11:54:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 11:54:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 11:54:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 11:54:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:54:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 11:54:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 11:54:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 11:54:59,393 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 11:54:59,393 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 11:54:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:54:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 11:54:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:54:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:54:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 11:54:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 11:54:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:54:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:54:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:54:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 11:54:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:54:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 11:54:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 11:54:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:54:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 11:54:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 11:54:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 11:54:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:54:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 11:54:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:55:00,538 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:55:00,538 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 11:55:00,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:55:00 BoogieIcfgContainer [2020-08-18 11:55:00,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:55:00,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:55:00,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:55:00,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:55:00,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:54:58" (1/3) ... [2020-08-18 11:55:00,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d0bc0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:55:00, skipping insertion in model container [2020-08-18 11:55:00,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:59" (2/3) ... [2020-08-18 11:55:00,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d0bc0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:55:00, skipping insertion in model container [2020-08-18 11:55:00,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:55:00" (3/3) ... [2020-08-18 11:55:00,552 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product55.cil.c [2020-08-18 11:55:00,563 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:55:00,571 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:55:00,585 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:55:00,611 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:55:00,611 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:55:00,611 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:55:00,611 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:55:00,612 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:55:00,612 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:55:00,612 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:55:00,612 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:55:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states. [2020-08-18 11:55:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 11:55:00,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:00,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:00,647 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 616057763, now seen corresponding path program 1 times [2020-08-18 11:55:00,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:00,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520979544] [2020-08-18 11:55:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:01,291 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:01,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:01,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:01,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:01,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:01,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:01,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:55:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:01,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 11:55:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:55:01,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520979544] [2020-08-18 11:55:01,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:01,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 11:55:01,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840513004] [2020-08-18 11:55:01,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 11:55:01,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 11:55:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:55:01,424 INFO L87 Difference]: Start difference. First operand 192 states. Second operand 3 states. [2020-08-18 11:55:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:02,678 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2020-08-18 11:55:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:55:02,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 11:55:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:02,696 INFO L225 Difference]: With dead ends: 343 [2020-08-18 11:55:02,696 INFO L226 Difference]: Without dead ends: 185 [2020-08-18 11:55:02,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:55:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-18 11:55:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 149. [2020-08-18 11:55:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 11:55:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2020-08-18 11:55:02,819 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 46 [2020-08-18 11:55:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:02,820 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2020-08-18 11:55:02,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 11:55:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2020-08-18 11:55:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 11:55:02,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:02,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:02,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:55:02,825 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2016430514, now seen corresponding path program 1 times [2020-08-18 11:55:02,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:02,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281903034] [2020-08-18 11:55:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,128 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:03,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:55:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:55:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:55:03,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281903034] [2020-08-18 11:55:03,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:03,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:55:03,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271614153] [2020-08-18 11:55:03,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:55:03,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:55:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:55:03,178 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 4 states. [2020-08-18 11:55:03,609 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:04,689 INFO L93 Difference]: Finished difference Result 270 states and 333 transitions. [2020-08-18 11:55:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:55:04,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 11:55:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:04,696 INFO L225 Difference]: With dead ends: 270 [2020-08-18 11:55:04,696 INFO L226 Difference]: Without dead ends: 169 [2020-08-18 11:55:04,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:55:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-18 11:55:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2020-08-18 11:55:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 11:55:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2020-08-18 11:55:04,772 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 47 [2020-08-18 11:55:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:04,773 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2020-08-18 11:55:04,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:55:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2020-08-18 11:55:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 11:55:04,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:04,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:04,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:55:04,787 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:04,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1603631393, now seen corresponding path program 1 times [2020-08-18 11:55:04,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:04,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679465082] [2020-08-18 11:55:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:05,166 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:05,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:05,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:05,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:05,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:05,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:55:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:05,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:55:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:55:05,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679465082] [2020-08-18 11:55:05,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:05,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:55:05,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132226116] [2020-08-18 11:55:05,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:55:05,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:55:05,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:55:05,249 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand 8 states. [2020-08-18 11:55:05,600 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:05,903 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:06,148 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:06,429 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:07,146 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:09,368 INFO L93 Difference]: Finished difference Result 476 states and 596 transitions. [2020-08-18 11:55:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:55:09,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 11:55:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:09,380 INFO L225 Difference]: With dead ends: 476 [2020-08-18 11:55:09,380 INFO L226 Difference]: Without dead ends: 360 [2020-08-18 11:55:09,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:55:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-08-18 11:55:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 298. [2020-08-18 11:55:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-08-18 11:55:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2020-08-18 11:55:09,451 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 51 [2020-08-18 11:55:09,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:09,451 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2020-08-18 11:55:09,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:55:09,451 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2020-08-18 11:55:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:55:09,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:09,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:09,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:55:09,454 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1180849517, now seen corresponding path program 1 times [2020-08-18 11:55:09,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:09,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845338957] [2020-08-18 11:55:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,732 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:09,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:55:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:55:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:55:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:55:09,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845338957] [2020-08-18 11:55:09,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:09,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:55:09,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911027855] [2020-08-18 11:55:09,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:55:09,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:55:09,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:55:09,846 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand 8 states. [2020-08-18 11:55:10,209 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:11,035 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:11,513 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:11,817 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:12,076 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:12,708 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:13,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:13,910 INFO L93 Difference]: Finished difference Result 960 states and 1249 transitions. [2020-08-18 11:55:13,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:55:13,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 11:55:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:13,916 INFO L225 Difference]: With dead ends: 960 [2020-08-18 11:55:13,916 INFO L226 Difference]: Without dead ends: 686 [2020-08-18 11:55:13,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:55:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-08-18 11:55:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 551. [2020-08-18 11:55:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-08-18 11:55:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 678 transitions. [2020-08-18 11:55:14,043 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 678 transitions. Word has length 57 [2020-08-18 11:55:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:14,043 INFO L479 AbstractCegarLoop]: Abstraction has 551 states and 678 transitions. [2020-08-18 11:55:14,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:55:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 678 transitions. [2020-08-18 11:55:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 11:55:14,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:14,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:14,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:55:14,047 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash -687352489, now seen corresponding path program 1 times [2020-08-18 11:55:14,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:14,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614585239] [2020-08-18 11:55:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,368 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:14,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:55:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:55:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:55:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 11:55:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:55:14,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614585239] [2020-08-18 11:55:14,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:14,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:55:14,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117997569] [2020-08-18 11:55:14,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:55:14,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:55:14,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:55:14,526 INFO L87 Difference]: Start difference. First operand 551 states and 678 transitions. Second operand 9 states. [2020-08-18 11:55:14,862 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:15,722 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:16,026 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:16,263 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:16,853 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:17,152 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:18,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:18,263 INFO L93 Difference]: Finished difference Result 1523 states and 2048 transitions. [2020-08-18 11:55:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 11:55:18,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 11:55:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:18,273 INFO L225 Difference]: With dead ends: 1523 [2020-08-18 11:55:18,273 INFO L226 Difference]: Without dead ends: 996 [2020-08-18 11:55:18,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 11:55:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-08-18 11:55:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 815. [2020-08-18 11:55:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 815 states. [2020-08-18 11:55:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1007 transitions. [2020-08-18 11:55:18,472 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1007 transitions. Word has length 61 [2020-08-18 11:55:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:18,475 INFO L479 AbstractCegarLoop]: Abstraction has 815 states and 1007 transitions. [2020-08-18 11:55:18,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:55:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1007 transitions. [2020-08-18 11:55:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 11:55:18,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:18,478 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] [2020-08-18 11:55:18,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:55:18,478 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1185420344, now seen corresponding path program 1 times [2020-08-18 11:55:18,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:18,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296723593] [2020-08-18 11:55:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,767 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:18,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:55:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:55:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:55:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:55:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 11:55:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 11:55:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:55:18,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296723593] [2020-08-18 11:55:18,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:18,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:55:18,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798375126] [2020-08-18 11:55:18,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:55:18,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:55:18,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:55:18,947 INFO L87 Difference]: Start difference. First operand 815 states and 1007 transitions. Second operand 9 states. [2020-08-18 11:55:19,912 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:20,178 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 11:55:20,443 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:20,706 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:21,948 INFO L93 Difference]: Finished difference Result 1863 states and 2473 transitions. [2020-08-18 11:55:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:55:21,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-08-18 11:55:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:21,959 INFO L225 Difference]: With dead ends: 1863 [2020-08-18 11:55:21,959 INFO L226 Difference]: Without dead ends: 1072 [2020-08-18 11:55:21,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 11:55:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-08-18 11:55:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 841. [2020-08-18 11:55:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2020-08-18 11:55:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1035 transitions. [2020-08-18 11:55:22,142 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1035 transitions. Word has length 88 [2020-08-18 11:55:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:22,143 INFO L479 AbstractCegarLoop]: Abstraction has 841 states and 1035 transitions. [2020-08-18 11:55:22,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:55:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1035 transitions. [2020-08-18 11:55:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 11:55:22,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:22,147 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] [2020-08-18 11:55:22,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:55:22,148 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:22,148 INFO L82 PathProgramCache]: Analyzing trace with hash -910660730, now seen corresponding path program 1 times [2020-08-18 11:55:22,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:22,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812430131] [2020-08-18 11:55:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,463 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:22,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:55:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:55:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:55:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:55:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 11:55:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 11:55:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:55:22,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812430131] [2020-08-18 11:55:22,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:22,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:55:22,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777444700] [2020-08-18 11:55:22,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:55:22,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:22,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:55:22,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:55:22,608 INFO L87 Difference]: Start difference. First operand 841 states and 1035 transitions. Second operand 11 states. [2020-08-18 11:55:23,096 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:23,338 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:23,573 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:24,292 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:24,571 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:24,835 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:26,221 INFO L93 Difference]: Finished difference Result 1917 states and 2592 transitions. [2020-08-18 11:55:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:55:26,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 88 [2020-08-18 11:55:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:26,232 INFO L225 Difference]: With dead ends: 1917 [2020-08-18 11:55:26,233 INFO L226 Difference]: Without dead ends: 1100 [2020-08-18 11:55:26,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:55:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-08-18 11:55:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 857. [2020-08-18 11:55:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-08-18 11:55:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1051 transitions. [2020-08-18 11:55:26,453 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1051 transitions. Word has length 88 [2020-08-18 11:55:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:26,453 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1051 transitions. [2020-08-18 11:55:26,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:55:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1051 transitions. [2020-08-18 11:55:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 11:55:26,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:26,456 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] [2020-08-18 11:55:26,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:55:26,456 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1039639525, now seen corresponding path program 1 times [2020-08-18 11:55:26,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:26,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643887781] [2020-08-18 11:55:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,721 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:26,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:55:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:55:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:55:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:55:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 11:55:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 11:55:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:55:26,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643887781] [2020-08-18 11:55:26,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:26,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:55:26,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116173363] [2020-08-18 11:55:26,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:55:26,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:26,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:55:26,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:55:26,888 INFO L87 Difference]: Start difference. First operand 857 states and 1051 transitions. Second operand 7 states. [2020-08-18 11:55:27,385 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:27,986 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:30,724 INFO L93 Difference]: Finished difference Result 2846 states and 3865 transitions. [2020-08-18 11:55:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 11:55:30,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-08-18 11:55:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:30,738 INFO L225 Difference]: With dead ends: 2846 [2020-08-18 11:55:30,738 INFO L226 Difference]: Without dead ends: 2013 [2020-08-18 11:55:30,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:55:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2020-08-18 11:55:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1711. [2020-08-18 11:55:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1711 states. [2020-08-18 11:55:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2117 transitions. [2020-08-18 11:55:31,103 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2117 transitions. Word has length 88 [2020-08-18 11:55:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:31,104 INFO L479 AbstractCegarLoop]: Abstraction has 1711 states and 2117 transitions. [2020-08-18 11:55:31,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:55:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2117 transitions. [2020-08-18 11:55:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 11:55:31,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:31,109 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, 1, 1, 1, 1] [2020-08-18 11:55:31,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:55:31,110 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash 745790239, now seen corresponding path program 1 times [2020-08-18 11:55:31,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:31,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022034852] [2020-08-18 11:55:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:55:31,186 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:55:31,186 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:55:31,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:55:31,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:55:31 BoogieIcfgContainer [2020-08-18 11:55:31,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:55:31,229 INFO L168 Benchmark]: Toolchain (without parser) took 32716.55 ms. Allocated memory was 147.8 MB in the beginning and 634.9 MB in the end (delta: 487.1 MB). Free memory was 102.6 MB in the beginning and 299.4 MB in the end (delta: -196.8 MB). Peak memory consumption was 290.2 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:31,230 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 11:55:31,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 683.97 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.4 MB in the beginning and 171.5 MB in the end (delta: -69.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:31,241 INFO L168 Benchmark]: Boogie Preprocessor took 107.19 ms. Allocated memory is still 204.5 MB. Free memory was 171.5 MB in the beginning and 167.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:31,242 INFO L168 Benchmark]: RCFGBuilder took 1238.30 ms. Allocated memory was 204.5 MB in the beginning and 236.5 MB in the end (delta: 32.0 MB). Free memory was 167.4 MB in the beginning and 192.7 MB in the end (delta: -25.4 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:31,244 INFO L168 Benchmark]: TraceAbstraction took 30682.29 ms. Allocated memory was 236.5 MB in the beginning and 634.9 MB in the end (delta: 398.5 MB). Free memory was 192.7 MB in the beginning and 299.4 MB in the end (delta: -106.7 MB). Peak memory consumption was 291.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:31,251 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 683.97 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.4 MB in the beginning and 171.5 MB in the end (delta: -69.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.19 ms. Allocated memory is still 204.5 MB. Free memory was 171.5 MB in the beginning and 167.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1238.30 ms. Allocated memory was 204.5 MB in the beginning and 236.5 MB in the end (delta: 32.0 MB). Free memory was 167.4 MB in the beginning and 192.7 MB in the end (delta: -25.4 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30682.29 ms. Allocated memory was 236.5 MB in the beginning and 634.9 MB in the end (delta: 398.5 MB). Free memory was 192.7 MB in the beginning and 299.4 MB in the end (delta: -106.7 MB). Peak memory consumption was 291.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 506]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L159] int pumpRunning = 0; [L160] int systemActive = 1; [L399] int waterLevel = 1; [L400] int methaneLevelCritical = 0; [L511] int cleanupTimeShifts = 4; [L802] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L584] int retValue_acc ; [L585] int tmp ; [L589] FCALL select_helpers() [L590] FCALL select_features() [L591] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L591] RET, EXPR valid_product() [L591] tmp = valid_product() [L593] COND TRUE \read(tmp) [L595] FCALL setup() [L596] CALL runTest() [L578] CALL test() [L84] int splverifierCounter ; [L85] int tmp ; [L86] int tmp___0 ; [L87] int tmp___1 ; [L88] int tmp___2 ; [L91] splverifierCounter = 0 [L93] COND TRUE 1 [L95] COND TRUE splverifierCounter < 4 [L101] tmp = __VERIFIER_nondet_int() [L103] COND TRUE \read(tmp) [L105] CALL waterRise() [L417] COND TRUE waterLevel < 2 [L418] waterLevel = waterLevel + 1 [L105] RET waterRise() [L111] tmp___0 = __VERIFIER_nondet_int() [L113] COND TRUE \read(tmp___0) [L115] CALL changeMethaneLevel() [L429] COND FALSE !(\read(methaneLevelCritical)) [L432] methaneLevelCritical = 1 [L115] RET changeMethaneLevel() [L121] tmp___2 = __VERIFIER_nondet_int() [L123] COND TRUE \read(tmp___2) [L138] CALL timeShift() [L167] COND FALSE !(\read(pumpRunning)) [L174] COND TRUE \read(systemActive) [L176] CALL processEnvironment() [L248] int tmp ; [L251] COND FALSE !(\read(pumpRunning)) [L266] CALL processEnvironment__wrappee__lowWaterSensor() [L222] int tmp ; [L225] COND FALSE !(\read(pumpRunning)) [L240] CALL processEnvironment__wrappee__highWaterSensor() [L196] int tmp ; [L199] COND TRUE ! pumpRunning [L201] CALL, EXPR isHighWaterLevel() [L345] int retValue_acc ; [L346] int tmp ; [L347] int tmp___0 ; [L351] CALL, EXPR isHighWaterSensorDry() [L479] int retValue_acc ; [L482] COND FALSE !(waterLevel < 2) [L486] retValue_acc = 0 [L487] return (retValue_acc); [L351] RET, EXPR isHighWaterSensorDry() [L351] tmp = isHighWaterSensorDry() [L353] COND FALSE !(\read(tmp)) [L356] tmp___0 = 1 [L358] retValue_acc = tmp___0 [L359] return (retValue_acc); [L201] RET, EXPR isHighWaterLevel() [L201] tmp = isHighWaterLevel() [L203] COND TRUE \read(tmp) [L205] CALL activatePump() [L276] pumpRunning = 1 [L205] RET activatePump() [L240] RET processEnvironment__wrappee__highWaterSensor() [L266] RET processEnvironment__wrappee__lowWaterSensor() [L176] RET processEnvironment() [L182] CALL __utac_acc__Specification1_spec__1() [L608] int tmp ; [L609] int tmp___0 ; [L613] CALL, EXPR isMethaneLevelCritical() [L438] int retValue_acc ; [L441] retValue_acc = methaneLevelCritical [L442] return (retValue_acc); [L613] RET, EXPR isMethaneLevelCritical() [L613] tmp = isMethaneLevelCritical() [L615] COND TRUE \read(tmp) [L617] CALL, EXPR isPumpRunning() [L300] int retValue_acc ; [L303] retValue_acc = pumpRunning [L304] return (retValue_acc); [L617] RET, EXPR isPumpRunning() [L617] tmp___0 = isPumpRunning() [L619] COND TRUE \read(tmp___0) [L621] CALL __automaton_fail() [L506] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 42 procedures, 251 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 25.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1101 SDtfs, 1942 SDslu, 1147 SDs, 0 SdLazy, 5838 SolverSat, 1210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1711occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 1219 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 618 NumberOfCodeBlocks, 618 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 157644 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...