/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product42.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:12:28,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:12:28,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:12:28,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:12:28,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:12:28,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:12:28,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:12:28,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:12:28,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:12:28,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:12:28,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:12:28,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:12:28,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:12:28,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:12:28,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:12:28,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:12:28,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:12:28,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:12:28,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:12:28,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:12:28,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:12:28,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:12:28,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:12:28,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:12:28,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:12:28,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:12:28,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:12:28,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:12:28,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:12:28,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:12:28,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:12:28,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:12:28,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:12:28,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:12:28,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:12:28,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:12:28,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:12:28,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:12:28,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:12:28,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:12:28,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:12:28,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:12:28,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:12:28,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:12:28,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:12:28,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:12:28,240 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:12:28,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:12:28,241 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:12:28,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:12:28,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:12:28,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:12:28,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:12:28,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:12:28,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:12:28,243 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:12:28,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:12:28,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:12:28,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:12:28,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:12:28,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:12:28,244 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:12:28,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:12:28,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:12:28,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:12:28,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:12:28,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:12:28,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:12:28,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:12:28,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:12:28,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:12:28,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:12:28,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:12:28,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:12:28,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:12:28,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:12:28,589 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:12:28,590 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product42.cil.c [2020-08-21 21:12:28,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a6afdcbb/f60ffac0fd1e4c8ebc6f6e19af4342a5/FLAG1c8b35630 [2020-08-21 21:12:29,169 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:12:29,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product42.cil.c [2020-08-21 21:12:29,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a6afdcbb/f60ffac0fd1e4c8ebc6f6e19af4342a5/FLAG1c8b35630 [2020-08-21 21:12:29,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a6afdcbb/f60ffac0fd1e4c8ebc6f6e19af4342a5 [2020-08-21 21:12:29,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:12:29,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:12:29,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:12:29,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:12:29,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:12:29,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:12:29" (1/1) ... [2020-08-21 21:12:29,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:29, skipping insertion in model container [2020-08-21 21:12:29,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:12:29" (1/1) ... [2020-08-21 21:12:29,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:12:29,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:12:29,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:12:29,985 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:12:30,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:12:30,206 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:12:30,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30 WrapperNode [2020-08-21 21:12:30,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:12:30,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:12:30,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:12:30,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:12:30,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (1/1) ... [2020-08-21 21:12:30,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (1/1) ... [2020-08-21 21:12:30,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (1/1) ... [2020-08-21 21:12:30,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (1/1) ... [2020-08-21 21:12:30,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (1/1) ... [2020-08-21 21:12:30,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (1/1) ... [2020-08-21 21:12:30,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (1/1) ... [2020-08-21 21:12:30,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:12:30,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:12:30,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:12:30,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:12:30,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:12:30,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:12:30,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:12:30,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 21:12:30,364 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 21:12:30,364 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 21:12:30,365 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 21:12:30,365 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 21:12:30,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:12:30,365 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 21:12:30,365 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 21:12:30,365 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 21:12:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 21:12:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-21 21:12:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 21:12:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 21:12:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 21:12:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 21:12:30,366 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 21:12:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 21:12:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 21:12:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 21:12:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 21:12:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 21:12:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 21:12:30,367 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 21:12:30,368 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 21:12:30,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 21:12:30,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 21:12:30,368 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 21:12:30,368 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 21:12:30,368 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 21:12:30,369 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 21:12:30,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 21:12:30,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 21:12:30,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 21:12:30,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 21:12:30,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 21:12:30,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 21:12:30,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-21 21:12:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:12:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:12:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 21:12:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 21:12:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 21:12:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 21:12:30,371 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 21:12:30,371 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 21:12:30,371 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 21:12:30,371 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 21:12:30,371 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 21:12:30,371 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 21:12:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 21:12:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 21:12:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 21:12:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:12:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 21:12:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 21:12:30,372 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 21:12:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 21:12:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 21:12:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 21:12:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 21:12:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 21:12:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-21 21:12:30,373 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 21:12:30,374 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 21:12:30,374 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 21:12:30,374 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-21 21:12:30,374 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 21:12:30,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:12:30,374 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 21:12:30,374 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 21:12:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 21:12:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 21:12:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:12:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:12:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 21:12:30,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 21:12:30,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:12:30,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:12:30,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:12:30,376 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 21:12:30,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:12:30,376 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 21:12:30,377 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 21:12:30,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:12:30,377 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 21:12:30,377 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 21:12:30,377 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 21:12:30,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:12:30,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 21:12:30,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:12:31,400 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:12:31,401 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 21:12:31,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:12:31 BoogieIcfgContainer [2020-08-21 21:12:31,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:12:31,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:12:31,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:12:31,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:12:31,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:12:29" (1/3) ... [2020-08-21 21:12:31,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de5a1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:12:31, skipping insertion in model container [2020-08-21 21:12:31,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:30" (2/3) ... [2020-08-21 21:12:31,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de5a1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:12:31, skipping insertion in model container [2020-08-21 21:12:31,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:12:31" (3/3) ... [2020-08-21 21:12:31,414 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product42.cil.c [2020-08-21 21:12:31,423 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:12:31,431 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:12:31,443 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:12:31,464 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:12:31,465 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:12:31,465 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:12:31,465 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:12:31,465 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:12:31,465 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:12:31,465 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:12:31,466 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:12:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-08-21 21:12:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 21:12:31,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:31,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:31,501 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:31,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1349332709, now seen corresponding path program 1 times [2020-08-21 21:12:31,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:31,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181327834] [2020-08-21 21:12:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,186 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:32,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:12:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:12:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 21:12:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:32,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181327834] [2020-08-21 21:12:32,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:32,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:12:32,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280156706] [2020-08-21 21:12:32,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:12:32,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:12:32,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:12:32,331 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 3 states. [2020-08-21 21:12:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:33,504 INFO L93 Difference]: Finished difference Result 296 states and 385 transitions. [2020-08-21 21:12:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:12:33,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 21:12:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:33,524 INFO L225 Difference]: With dead ends: 296 [2020-08-21 21:12:33,525 INFO L226 Difference]: Without dead ends: 160 [2020-08-21 21:12:33,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:12:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-21 21:12:33,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 127. [2020-08-21 21:12:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 21:12:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2020-08-21 21:12:33,612 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 52 [2020-08-21 21:12:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:33,613 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2020-08-21 21:12:33,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:12:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2020-08-21 21:12:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:12:33,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:33,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:33,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:12:33,617 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1093164693, now seen corresponding path program 1 times [2020-08-21 21:12:33,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:33,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197009466] [2020-08-21 21:12:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:33,981 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:33,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:34,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:34,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:34,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:34,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:34,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:12:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:34,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:12:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:34,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 21:12:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:34,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197009466] [2020-08-21 21:12:34,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:34,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:12:34,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578069973] [2020-08-21 21:12:34,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:12:34,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:34,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:12:34,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:12:34,034 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand 4 states. [2020-08-21 21:12:34,443 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:35,227 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2020-08-21 21:12:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:12:35,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-21 21:12:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:35,231 INFO L225 Difference]: With dead ends: 225 [2020-08-21 21:12:35,231 INFO L226 Difference]: Without dead ends: 144 [2020-08-21 21:12:35,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:12:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-21 21:12:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 118. [2020-08-21 21:12:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-21 21:12:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2020-08-21 21:12:35,268 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 53 [2020-08-21 21:12:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:35,268 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2020-08-21 21:12:35,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:12:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2020-08-21 21:12:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 21:12:35,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:35,271 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] [2020-08-21 21:12:35,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:12:35,272 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:35,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1756790423, now seen corresponding path program 1 times [2020-08-21 21:12:35,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:35,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633973669] [2020-08-21 21:12:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,618 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:35,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:12:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 21:12:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 21:12:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:35,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633973669] [2020-08-21 21:12:35,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:35,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:12:35,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637222787] [2020-08-21 21:12:35,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:12:35,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:35,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:12:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:12:35,743 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand 8 states. [2020-08-21 21:12:36,143 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:36,476 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:36,754 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:36,997 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:38,144 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-21 21:12:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:12:38,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-21 21:12:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:38,154 INFO L225 Difference]: With dead ends: 238 [2020-08-21 21:12:38,154 INFO L226 Difference]: Without dead ends: 144 [2020-08-21 21:12:38,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:12:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-21 21:12:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 118. [2020-08-21 21:12:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-21 21:12:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2020-08-21 21:12:38,209 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 58 [2020-08-21 21:12:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:38,210 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2020-08-21 21:12:38,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:12:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2020-08-21 21:12:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 21:12:38,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:38,220 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] [2020-08-21 21:12:38,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:12:38,220 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1312872772, now seen corresponding path program 1 times [2020-08-21 21:12:38,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:38,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778428303] [2020-08-21 21:12:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,530 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:38,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 21:12:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 21:12:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 21:12:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 21:12:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:38,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778428303] [2020-08-21 21:12:38,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:38,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:12:38,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772439926] [2020-08-21 21:12:38,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:12:38,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:12:38,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:12:38,610 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand 6 states. [2020-08-21 21:12:38,933 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:40,073 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:40,688 INFO L93 Difference]: Finished difference Result 338 states and 414 transitions. [2020-08-21 21:12:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:12:40,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-21 21:12:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:40,694 INFO L225 Difference]: With dead ends: 338 [2020-08-21 21:12:40,694 INFO L226 Difference]: Without dead ends: 244 [2020-08-21 21:12:40,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:12:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-21 21:12:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2020-08-21 21:12:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-08-21 21:12:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 230 transitions. [2020-08-21 21:12:40,747 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 230 transitions. Word has length 66 [2020-08-21 21:12:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:40,748 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 230 transitions. [2020-08-21 21:12:40,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:12:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 230 transitions. [2020-08-21 21:12:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-21 21:12:40,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:40,749 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] [2020-08-21 21:12:40,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:12:40,750 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash 362669874, now seen corresponding path program 1 times [2020-08-21 21:12:40,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:40,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348643077] [2020-08-21 21:12:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,015 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:41,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 21:12:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:12:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:12:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 21:12:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:12:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 21:12:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:41,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348643077] [2020-08-21 21:12:41,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:41,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:12:41,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114646206] [2020-08-21 21:12:41,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:12:41,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:12:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:12:41,133 INFO L87 Difference]: Start difference. First operand 201 states and 230 transitions. Second operand 8 states. [2020-08-21 21:12:41,557 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:42,900 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:43,184 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:43,422 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:43,642 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:44,272 INFO L93 Difference]: Finished difference Result 555 states and 692 transitions. [2020-08-21 21:12:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:12:44,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-08-21 21:12:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:44,279 INFO L225 Difference]: With dead ends: 555 [2020-08-21 21:12:44,279 INFO L226 Difference]: Without dead ends: 378 [2020-08-21 21:12:44,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:12:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-21 21:12:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 335. [2020-08-21 21:12:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-08-21 21:12:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 389 transitions. [2020-08-21 21:12:44,402 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 389 transitions. Word has length 80 [2020-08-21 21:12:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:44,403 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 389 transitions. [2020-08-21 21:12:44,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:12:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 389 transitions. [2020-08-21 21:12:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 21:12:44,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:44,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:44,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:12:44,405 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash 871612076, now seen corresponding path program 1 times [2020-08-21 21:12:44,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:44,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082931080] [2020-08-21 21:12:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,672 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:44,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:12:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:12:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:12:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:12:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:12:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 21:12:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 21:12:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:44,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082931080] [2020-08-21 21:12:44,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:44,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:12:44,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834357288] [2020-08-21 21:12:44,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:12:44,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:44,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:12:44,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:12:44,804 INFO L87 Difference]: Start difference. First operand 335 states and 389 transitions. Second operand 9 states. [2020-08-21 21:12:45,211 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:45,702 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:47,228 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:48,788 INFO L93 Difference]: Finished difference Result 815 states and 1039 transitions. [2020-08-21 21:12:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 21:12:48,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 21:12:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:48,795 INFO L225 Difference]: With dead ends: 815 [2020-08-21 21:12:48,795 INFO L226 Difference]: Without dead ends: 627 [2020-08-21 21:12:48,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-08-21 21:12:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-08-21 21:12:48,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 556. [2020-08-21 21:12:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-08-21 21:12:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 666 transitions. [2020-08-21 21:12:48,918 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 666 transitions. Word has length 84 [2020-08-21 21:12:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:48,919 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 666 transitions. [2020-08-21 21:12:48,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:12:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 666 transitions. [2020-08-21 21:12:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 21:12:48,921 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:48,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:48,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:12:48,921 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1201377837, now seen corresponding path program 1 times [2020-08-21 21:12:48,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:48,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142740074] [2020-08-21 21:12:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,184 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:49,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:12:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:12:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:12:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:12:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:12:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 21:12:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 21:12:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:49,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142740074] [2020-08-21 21:12:49,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:49,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:12:49,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704683451] [2020-08-21 21:12:49,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:12:49,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:49,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:12:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:12:49,333 INFO L87 Difference]: Start difference. First operand 556 states and 666 transitions. Second operand 8 states. [2020-08-21 21:12:50,220 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:50,462 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:50,720 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:51,584 INFO L93 Difference]: Finished difference Result 1006 states and 1249 transitions. [2020-08-21 21:12:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:12:51,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-08-21 21:12:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:51,589 INFO L225 Difference]: With dead ends: 1006 [2020-08-21 21:12:51,589 INFO L226 Difference]: Without dead ends: 601 [2020-08-21 21:12:51,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:12:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-08-21 21:12:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 556. [2020-08-21 21:12:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-08-21 21:12:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 665 transitions. [2020-08-21 21:12:51,696 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 665 transitions. Word has length 84 [2020-08-21 21:12:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:51,697 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 665 transitions. [2020-08-21 21:12:51,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:12:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 665 transitions. [2020-08-21 21:12:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 21:12:51,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:51,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:51,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:12:51,699 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:51,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1128991279, now seen corresponding path program 1 times [2020-08-21 21:12:51,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:51,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168370218] [2020-08-21 21:12:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:51,944 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:51,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:51,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:51,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:51,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:51,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:12:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:12:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:12:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:12:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:12:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 21:12:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 21:12:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:52,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168370218] [2020-08-21 21:12:52,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:52,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 21:12:52,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104456973] [2020-08-21 21:12:52,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:12:52,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:12:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:12:52,119 INFO L87 Difference]: Start difference. First operand 556 states and 665 transitions. Second operand 12 states. [2020-08-21 21:12:52,737 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:52,981 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:53,219 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:53,937 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:54,177 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:12:54,456 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:54,698 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:55,787 INFO L93 Difference]: Finished difference Result 1144 states and 1416 transitions. [2020-08-21 21:12:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 21:12:55,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-08-21 21:12:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:55,792 INFO L225 Difference]: With dead ends: 1144 [2020-08-21 21:12:55,793 INFO L226 Difference]: Without dead ends: 612 [2020-08-21 21:12:55,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-21 21:12:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-08-21 21:12:55,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 563. [2020-08-21 21:12:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-08-21 21:12:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 672 transitions. [2020-08-21 21:12:55,902 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 672 transitions. Word has length 84 [2020-08-21 21:12:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:55,903 INFO L479 AbstractCegarLoop]: Abstraction has 563 states and 672 transitions. [2020-08-21 21:12:55,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:12:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 672 transitions. [2020-08-21 21:12:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-21 21:12:55,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:55,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:55,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:12:55,906 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash -482545033, now seen corresponding path program 1 times [2020-08-21 21:12:55,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:55,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144595584] [2020-08-21 21:12:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,212 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:56,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:12:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:12:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:12:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:12:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:12:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:12:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 21:12:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 21:12:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-21 21:12:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:12:56,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144595584] [2020-08-21 21:12:56,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:12:56,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 21:12:56,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021407661] [2020-08-21 21:12:56,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:12:56,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:56,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:12:56,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:12:56,528 INFO L87 Difference]: Start difference. First operand 563 states and 672 transitions. Second operand 12 states. [2020-08-21 21:12:57,152 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:57,887 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:58,729 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:12:59,031 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:12:59,304 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:12:59,545 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:12:59,833 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:13:00,092 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:13:00,590 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 191 [2020-08-21 21:13:00,844 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:13:01,123 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:13:01,418 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 21:13:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:13:03,347 INFO L93 Difference]: Finished difference Result 1664 states and 2066 transitions. [2020-08-21 21:13:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 21:13:03,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2020-08-21 21:13:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:13:03,355 INFO L225 Difference]: With dead ends: 1664 [2020-08-21 21:13:03,355 INFO L226 Difference]: Without dead ends: 1125 [2020-08-21 21:13:03,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2020-08-21 21:13:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2020-08-21 21:13:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1062. [2020-08-21 21:13:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-08-21 21:13:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1253 transitions. [2020-08-21 21:13:03,517 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1253 transitions. Word has length 96 [2020-08-21 21:13:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:13:03,518 INFO L479 AbstractCegarLoop]: Abstraction has 1062 states and 1253 transitions. [2020-08-21 21:13:03,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:13:03,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1253 transitions. [2020-08-21 21:13:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 21:13:03,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:13:03,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:13:03,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:13:03,521 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:13:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:13:03,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1334976659, now seen corresponding path program 1 times [2020-08-21 21:13:03,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:13:03,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663001088] [2020-08-21 21:13:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:13:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,789 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:13:03,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:13:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:13:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:13:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:13:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:13:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:13:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 21:13:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 21:13:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:13:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:13:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:13:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:13:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:13:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 21:13:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 21:13:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 21:13:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:13:03,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663001088] [2020-08-21 21:13:03,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:13:03,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 21:13:03,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444353456] [2020-08-21 21:13:03,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 21:13:03,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:13:03,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 21:13:03,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:13:03,943 INFO L87 Difference]: Start difference. First operand 1062 states and 1253 transitions. Second operand 14 states. [2020-08-21 21:13:04,527 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:13:04,792 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:13:05,014 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:13:05,577 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:13:06,342 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:13:06,698 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:13:07,288 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:13:07,560 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:13:07,826 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:13:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:13:09,671 INFO L93 Difference]: Finished difference Result 2205 states and 2747 transitions. [2020-08-21 21:13:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 21:13:09,671 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 100 [2020-08-21 21:13:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:13:09,681 INFO L225 Difference]: With dead ends: 2205 [2020-08-21 21:13:09,681 INFO L226 Difference]: Without dead ends: 1167 [2020-08-21 21:13:09,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 21:13:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2020-08-21 21:13:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 978. [2020-08-21 21:13:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-08-21 21:13:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1149 transitions. [2020-08-21 21:13:09,849 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1149 transitions. Word has length 100 [2020-08-21 21:13:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:13:09,849 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1149 transitions. [2020-08-21 21:13:09,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 21:13:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1149 transitions. [2020-08-21 21:13:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 21:13:09,852 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:13:09,852 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:13:09,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:13:09,853 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:13:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:13:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1799494055, now seen corresponding path program 1 times [2020-08-21 21:13:09,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:13:09,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46536881] [2020-08-21 21:13:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:13:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,168 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:13:10,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:13:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:13:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:13:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:13:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:13:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:13:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 21:13:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:13:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:13:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:13:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:13:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:13:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:13:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 21:13:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 21:13:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 21:13:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:13:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:13:10,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46536881] [2020-08-21 21:13:10,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:13:10,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 21:13:10,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423521302] [2020-08-21 21:13:10,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:13:10,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:13:10,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:13:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:13:10,346 INFO L87 Difference]: Start difference. First operand 978 states and 1149 transitions. Second operand 13 states. [2020-08-21 21:13:11,101 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:13:11,349 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:13:11,601 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:13:12,750 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:13:13,258 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:13:13,591 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:13:13,877 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:13:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:13:14,612 INFO L93 Difference]: Finished difference Result 1688 states and 1988 transitions. [2020-08-21 21:13:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 21:13:14,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 100 [2020-08-21 21:13:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:13:14,614 INFO L225 Difference]: With dead ends: 1688 [2020-08-21 21:13:14,614 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 21:13:14,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-08-21 21:13:14,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 21:13:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 21:13:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 21:13:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 21:13:14,620 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2020-08-21 21:13:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:13:14,621 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 21:13:14,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:13:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 21:13:14,621 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 21:13:14,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:13:14,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 21:13:15,789 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 240 [2020-08-21 21:13:18,367 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 235 [2020-08-21 21:13:18,943 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 235 [2020-08-21 21:13:19,267 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 240 [2020-08-21 21:13:19,768 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 240 [2020-08-21 21:13:20,814 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 26 [2020-08-21 21:13:21,958 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 162 DAG size of output: 30 [2020-08-21 21:13:22,123 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 1 [2020-08-21 21:13:22,575 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 40 [2020-08-21 21:13:22,737 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 24 [2020-08-21 21:13:22,995 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 23 [2020-08-21 21:13:23,151 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 1 [2020-08-21 21:13:24,311 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 170 DAG size of output: 38 [2020-08-21 21:13:24,475 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 1 [2020-08-21 21:13:25,286 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 26 [2020-08-21 21:13:25,605 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 27 [2020-08-21 21:13:26,172 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 30 [2020-08-21 21:13:27,074 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 33 [2020-08-21 21:13:28,276 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 168 DAG size of output: 30 [2020-08-21 21:13:28,509 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:13:28,625 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-08-21 21:13:28,796 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 1