/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_spec4_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:40:29,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:40:29,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:40:29,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:40:29,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:40:29,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:40:29,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:40:29,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:40:29,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:40:29,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:40:29,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:40:29,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:40:29,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:40:29,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:40:29,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:40:29,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:40:29,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:40:29,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:40:29,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:40:29,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:40:29,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:40:29,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:40:29,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:40:29,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:40:29,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:40:29,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:40:29,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:40:29,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:40:29,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:40:29,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:40:29,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:40:29,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:40:29,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:40:29,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:40:29,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:40:29,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:40:29,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:40:29,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:40:29,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:40:29,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:40:29,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:40:29,196 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 23:40:29,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:40:29,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:40:29,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:40:29,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:40:29,253 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:40:29,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:40:29,254 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:40:29,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:40:29,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:40:29,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:40:29,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:40:29,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:40:29,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:40:29,255 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:40:29,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:40:29,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:40:29,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:40:29,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:40:29,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:40:29,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:40:29,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:40:29,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:40:29,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:40:29,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:40:29,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:40:29,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:40:29,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:40:29,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:40:29,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:40:29,259 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:40:29,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:40:29,576 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:40:29,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:40:29,581 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:40:29,581 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:40:29,582 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-21 23:40:29,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9064d394b/b0d67c91272c426e8baf5a13a3d13e9b/FLAG5c4a7ba3d [2020-08-21 23:40:30,157 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:40:30,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-21 23:40:30,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9064d394b/b0d67c91272c426e8baf5a13a3d13e9b/FLAG5c4a7ba3d [2020-08-21 23:40:30,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9064d394b/b0d67c91272c426e8baf5a13a3d13e9b [2020-08-21 23:40:30,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:40:30,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:40:30,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:40:30,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:40:30,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:40:30,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:40:30" (1/1) ... [2020-08-21 23:40:30,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7701fc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:30, skipping insertion in model container [2020-08-21 23:40:30,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:40:30" (1/1) ... [2020-08-21 23:40:30,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:40:30,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:40:31,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:40:31,139 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:40:31,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:40:31,257 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:40:31,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31 WrapperNode [2020-08-21 23:40:31,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:40:31,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:40:31,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:40:31,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:40:31,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (1/1) ... [2020-08-21 23:40:31,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (1/1) ... [2020-08-21 23:40:31,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (1/1) ... [2020-08-21 23:40:31,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (1/1) ... [2020-08-21 23:40:31,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (1/1) ... [2020-08-21 23:40:31,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (1/1) ... [2020-08-21 23:40:31,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (1/1) ... [2020-08-21 23:40:31,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:40:31,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:40:31,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:40:31,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:40:31,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (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 23:40:31,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:40:31,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:40:31,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 23:40:31,414 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 23:40:31,414 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 23:40:31,414 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 23:40:31,414 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 23:40:31,414 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 23:40:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 23:40:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 23:40:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 23:40:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 23:40:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 23:40:31,415 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 23:40:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 23:40:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 23:40:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 23:40:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 23:40:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 23:40:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 23:40:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 23:40:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 23:40:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 23:40:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 23:40:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 23:40:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 23:40:31,418 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 23:40:31,418 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 23:40:31,418 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 23:40:31,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:40:31,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 23:40:31,418 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 23:40:31,418 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 23:40:31,419 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 23:40:31,419 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 23:40:31,419 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 23:40:31,419 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 23:40:31,419 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 23:40:31,420 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 23:40:31,420 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 23:40:31,420 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 23:40:31,420 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 23:40:31,420 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 23:40:31,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:40:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:40:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 23:40:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 23:40:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 23:40:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 23:40:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 23:40:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 23:40:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 23:40:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 23:40:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 23:40:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 23:40:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 23:40:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 23:40:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 23:40:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 23:40:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 23:40:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 23:40:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 23:40:31,423 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 23:40:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 23:40:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 23:40:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 23:40:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:40:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 23:40:31,424 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 23:40:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 23:40:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 23:40:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 23:40:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 23:40:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 23:40:31,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 23:40:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 23:40:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:40:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 23:40:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 23:40:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 23:40:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 23:40:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 23:40:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 23:40:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 23:40:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 23:40:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 23:40:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 23:40:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 23:40:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 23:40:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 23:40:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 23:40:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 23:40:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 23:40:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 23:40:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 23:40:31,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:40:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 23:40:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:40:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 23:40:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:40:32,575 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:40:32,576 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 23:40:32,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:40:32 BoogieIcfgContainer [2020-08-21 23:40:32,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:40:32,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:40:32,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:40:32,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:40:32,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:40:30" (1/3) ... [2020-08-21 23:40:32,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476642bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:40:32, skipping insertion in model container [2020-08-21 23:40:32,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:40:31" (2/3) ... [2020-08-21 23:40:32,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476642bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:40:32, skipping insertion in model container [2020-08-21 23:40:32,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:40:32" (3/3) ... [2020-08-21 23:40:32,590 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2020-08-21 23:40:32,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:40:32,609 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:40:32,623 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:40:32,649 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:40:32,649 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:40:32,650 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:40:32,650 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:40:32,650 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:40:32,650 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:40:32,651 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:40:32,651 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:40:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-08-21 23:40:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 23:40:32,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:32,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:32,688 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash -559348317, now seen corresponding path program 1 times [2020-08-21 23:40:32,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:32,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155013047] [2020-08-21 23:40:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:33,411 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:33,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:33,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:33,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:33,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:33,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:33,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 23:40:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:33,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 23:40:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:33,510 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 23:40:33,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155013047] [2020-08-21 23:40:33,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:40:33,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:40:33,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120466065] [2020-08-21 23:40:33,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:40:33,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:33,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:40:33,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:40:33,540 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2020-08-21 23:40:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:34,873 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2020-08-21 23:40:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:40:34,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 23:40:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:34,892 INFO L225 Difference]: With dead ends: 358 [2020-08-21 23:40:34,892 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 23:40:34,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:40:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 23:40:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2020-08-21 23:40:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-21 23:40:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2020-08-21 23:40:35,004 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 46 [2020-08-21 23:40:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:35,005 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2020-08-21 23:40:35,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:40:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2020-08-21 23:40:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 23:40:35,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:35,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:35,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:40:35,010 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:35,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1620740414, now seen corresponding path program 1 times [2020-08-21 23:40:35,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:35,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047989696] [2020-08-21 23:40:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,375 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:35,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:40:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 23:40:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:35,420 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 23:40:35,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047989696] [2020-08-21 23:40:35,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:40:35,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:40:35,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580889717] [2020-08-21 23:40:35,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:40:35,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:35,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:40:35,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:40:35,424 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 4 states. [2020-08-21 23:40:35,876 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:36,960 INFO L93 Difference]: Finished difference Result 281 states and 343 transitions. [2020-08-21 23:40:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:40:36,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 23:40:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:36,966 INFO L225 Difference]: With dead ends: 281 [2020-08-21 23:40:36,966 INFO L226 Difference]: Without dead ends: 177 [2020-08-21 23:40:36,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:40:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-21 23:40:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2020-08-21 23:40:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-21 23:40:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2020-08-21 23:40:37,014 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 47 [2020-08-21 23:40:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:37,015 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2020-08-21 23:40:37,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:40:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2020-08-21 23:40:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 23:40:37,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:37,018 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 23:40:37,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:40:37,018 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash -396868600, now seen corresponding path program 1 times [2020-08-21 23:40:37,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:37,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630106956] [2020-08-21 23:40:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:37,341 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:37,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:37,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:37,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:37,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:37,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 23:40:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:37,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 23:40:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:37,451 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 23:40:37,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630106956] [2020-08-21 23:40:37,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:40:37,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:40:37,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961131824] [2020-08-21 23:40:37,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:40:37,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:37,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:40:37,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:40:37,455 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 8 states. [2020-08-21 23:40:37,834 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:38,156 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:38,404 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:38,645 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:39,411 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:41,617 INFO L93 Difference]: Finished difference Result 500 states and 619 transitions. [2020-08-21 23:40:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:40:41,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 23:40:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:41,623 INFO L225 Difference]: With dead ends: 500 [2020-08-21 23:40:41,624 INFO L226 Difference]: Without dead ends: 377 [2020-08-21 23:40:41,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:40:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-21 23:40:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 308. [2020-08-21 23:40:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-08-21 23:40:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2020-08-21 23:40:41,716 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 52 [2020-08-21 23:40:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:41,716 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2020-08-21 23:40:41,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:40:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2020-08-21 23:40:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 23:40:41,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:41,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:41,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:40:41,720 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1317156286, now seen corresponding path program 1 times [2020-08-21 23:40:41,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:41,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384653964] [2020-08-21 23:40:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,141 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:42,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:40:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 23:40:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:40:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:42,281 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 23:40:42,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384653964] [2020-08-21 23:40:42,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:40:42,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 23:40:42,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483480457] [2020-08-21 23:40:42,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:40:42,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:42,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:40:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:40:42,285 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand 12 states. [2020-08-21 23:40:42,765 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:43,086 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:43,357 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:43,609 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:44,136 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:40:44,999 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:45,370 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:40:45,692 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:40:45,960 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:40:46,264 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:46,647 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:40:47,043 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:40:47,447 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:40:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:49,785 INFO L93 Difference]: Finished difference Result 1257 states and 1722 transitions. [2020-08-21 23:40:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 23:40:49,785 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 23:40:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:49,793 INFO L225 Difference]: With dead ends: 1257 [2020-08-21 23:40:49,794 INFO L226 Difference]: Without dead ends: 973 [2020-08-21 23:40:49,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 23:40:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-08-21 23:40:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 872. [2020-08-21 23:40:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 23:40:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1114 transitions. [2020-08-21 23:40:50,014 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1114 transitions. Word has length 57 [2020-08-21 23:40:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:50,015 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1114 transitions. [2020-08-21 23:40:50,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:40:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1114 transitions. [2020-08-21 23:40:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 23:40:50,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:50,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:50,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:40:50,022 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:50,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1811637144, now seen corresponding path program 1 times [2020-08-21 23:40:50,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:50,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278477581] [2020-08-21 23:40:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,317 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:50,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:40:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 23:40:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 23:40:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 23:40:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:50,413 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 23:40:50,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278477581] [2020-08-21 23:40:50,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:40:50,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:40:50,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323739001] [2020-08-21 23:40:50,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:40:50,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:40:50,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:40:50,415 INFO L87 Difference]: Start difference. First operand 872 states and 1114 transitions. Second operand 6 states. [2020-08-21 23:40:50,801 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:52,861 INFO L93 Difference]: Finished difference Result 2053 states and 2819 transitions. [2020-08-21 23:40:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:40:52,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 23:40:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:52,876 INFO L225 Difference]: With dead ends: 2053 [2020-08-21 23:40:52,876 INFO L226 Difference]: Without dead ends: 1205 [2020-08-21 23:40:52,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:40:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-08-21 23:40:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1114. [2020-08-21 23:40:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2020-08-21 23:40:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1402 transitions. [2020-08-21 23:40:53,132 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1402 transitions. Word has length 61 [2020-08-21 23:40:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:53,134 INFO L479 AbstractCegarLoop]: Abstraction has 1114 states and 1402 transitions. [2020-08-21 23:40:53,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:40:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1402 transitions. [2020-08-21 23:40:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 23:40:53,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:53,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:53,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:40:53,140 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1078445760, now seen corresponding path program 1 times [2020-08-21 23:40:53,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:53,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628787805] [2020-08-21 23:40:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,417 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:53,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:40:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:40:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:40:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:40:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:40:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 23:40:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 23:40:53,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628787805] [2020-08-21 23:40:53,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:40:53,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:40:53,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005225065] [2020-08-21 23:40:53,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:40:53,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:40:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:40:53,635 INFO L87 Difference]: Start difference. First operand 1114 states and 1402 transitions. Second operand 10 states. [2020-08-21 23:40:54,302 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 23:40:54,957 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:56,893 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:40:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:40:59,196 INFO L93 Difference]: Finished difference Result 2165 states and 2849 transitions. [2020-08-21 23:40:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 23:40:59,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-21 23:40:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:40:59,206 INFO L225 Difference]: With dead ends: 2165 [2020-08-21 23:40:59,206 INFO L226 Difference]: Without dead ends: 1340 [2020-08-21 23:40:59,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:40:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2020-08-21 23:40:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1227. [2020-08-21 23:40:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-21 23:40:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1523 transitions. [2020-08-21 23:40:59,463 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1523 transitions. Word has length 89 [2020-08-21 23:40:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:40:59,463 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1523 transitions. [2020-08-21 23:40:59,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:40:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1523 transitions. [2020-08-21 23:40:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-21 23:40:59,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:40:59,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:40:59,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:40:59,470 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:40:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:40:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash -478965993, now seen corresponding path program 1 times [2020-08-21 23:40:59,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:40:59,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597358125] [2020-08-21 23:40:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:40:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,732 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:40:59,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:40:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:40:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:40:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:40:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:40:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:40:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:40:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:40:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:40:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 23:40:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 23:40:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:40:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:40:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:40:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 23:40:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 23:40:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:40:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 23:40:59,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597358125] [2020-08-21 23:40:59,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:40:59,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:40:59,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67165853] [2020-08-21 23:40:59,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:40:59,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:40:59,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:40:59,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:40:59,919 INFO L87 Difference]: Start difference. First operand 1227 states and 1523 transitions. Second operand 9 states. [2020-08-21 23:41:01,023 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:01,228 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:01,458 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:41:02,524 INFO L93 Difference]: Finished difference Result 2268 states and 2960 transitions. [2020-08-21 23:41:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:41:02,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2020-08-21 23:41:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:41:02,537 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 23:41:02,538 INFO L226 Difference]: Without dead ends: 1353 [2020-08-21 23:41:02,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:41:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2020-08-21 23:41:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1227. [2020-08-21 23:41:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-21 23:41:02,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1521 transitions. [2020-08-21 23:41:02,751 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1521 transitions. Word has length 137 [2020-08-21 23:41:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:41:02,752 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1521 transitions. [2020-08-21 23:41:02,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:41:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1521 transitions. [2020-08-21 23:41:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 23:41:02,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:41:02,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:41:02,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:41:02,757 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:41:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:41:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1688312402, now seen corresponding path program 1 times [2020-08-21 23:41:02,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:41:02,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209896353] [2020-08-21 23:41:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:41:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,050 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:41:03,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:41:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:41:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:41:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:41:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:41:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:41:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:41:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:41:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 23:41:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 23:41:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:41:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-21 23:41:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 23:41:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 23:41:03,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209896353] [2020-08-21 23:41:03,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:41:03,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:41:03,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989753434] [2020-08-21 23:41:03,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:41:03,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:41:03,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:41:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:41:03,255 INFO L87 Difference]: Start difference. First operand 1227 states and 1521 transitions. Second operand 10 states. [2020-08-21 23:41:04,621 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:04,857 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 23:41:05,102 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:05,339 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:41:06,376 INFO L93 Difference]: Finished difference Result 2564 states and 3284 transitions. [2020-08-21 23:41:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:41:06,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-21 23:41:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:41:06,385 INFO L225 Difference]: With dead ends: 2564 [2020-08-21 23:41:06,385 INFO L226 Difference]: Without dead ends: 1361 [2020-08-21 23:41:06,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:41:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-08-21 23:41:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1247. [2020-08-21 23:41:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2020-08-21 23:41:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1543 transitions. [2020-08-21 23:41:06,671 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1543 transitions. Word has length 133 [2020-08-21 23:41:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:41:06,671 INFO L479 AbstractCegarLoop]: Abstraction has 1247 states and 1543 transitions. [2020-08-21 23:41:06,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:41:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1543 transitions. [2020-08-21 23:41:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 23:41:06,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:41:06,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:41:06,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:41:06,677 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:41:06,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:41:06,678 INFO L82 PathProgramCache]: Analyzing trace with hash 545809936, now seen corresponding path program 1 times [2020-08-21 23:41:06,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:41:06,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713956227] [2020-08-21 23:41:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:41:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:06,953 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:41:06,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:41:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:06,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:41:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:06,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:41:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:06,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:41:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:06,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:41:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:06,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 23:41:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:41:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:41:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 23:41:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 23:41:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:41:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-21 23:41:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 23:41:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 23:41:07,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713956227] [2020-08-21 23:41:07,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:41:07,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 23:41:07,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181418072] [2020-08-21 23:41:07,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:41:07,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:41:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:41:07,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:41:07,127 INFO L87 Difference]: Start difference. First operand 1247 states and 1543 transitions. Second operand 12 states. [2020-08-21 23:41:07,794 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:08,112 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:08,480 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:09,296 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:09,542 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:09,770 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:41:10,954 INFO L93 Difference]: Finished difference Result 2351 states and 3005 transitions. [2020-08-21 23:41:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:41:10,954 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 133 [2020-08-21 23:41:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:41:10,961 INFO L225 Difference]: With dead ends: 2351 [2020-08-21 23:41:10,962 INFO L226 Difference]: Without dead ends: 1128 [2020-08-21 23:41:10,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 23:41:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-08-21 23:41:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1070. [2020-08-21 23:41:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-08-21 23:41:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1296 transitions. [2020-08-21 23:41:11,195 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1296 transitions. Word has length 133 [2020-08-21 23:41:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:41:11,196 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1296 transitions. [2020-08-21 23:41:11,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:41:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1296 transitions. [2020-08-21 23:41:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-21 23:41:11,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:41:11,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:41:11,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:41:11,200 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:41:11,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:41:11,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1621468459, now seen corresponding path program 1 times [2020-08-21 23:41:11,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:41:11,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657565177] [2020-08-21 23:41:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:41:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,463 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:41:11,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:41:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:41:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:41:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:41:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:41:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:41:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:41:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:41:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:41:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 23:41:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 23:41:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:41:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 23:41:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 23:41:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 23:41:11,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657565177] [2020-08-21 23:41:11,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:41:11,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 23:41:11,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815228229] [2020-08-21 23:41:11,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 23:41:11,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:41:11,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 23:41:11,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:41:11,790 INFO L87 Difference]: Start difference. First operand 1070 states and 1296 transitions. Second operand 13 states. [2020-08-21 23:41:12,704 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:41:13,477 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:15,899 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:16,179 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:16,437 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:16,722 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:41:16,987 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:17,257 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:41:17,503 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:17,752 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:41:18,039 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:41:18,269 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:41:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:41:19,266 INFO L93 Difference]: Finished difference Result 3048 states and 3818 transitions. [2020-08-21 23:41:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 23:41:19,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-08-21 23:41:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:41:19,278 INFO L225 Difference]: With dead ends: 3048 [2020-08-21 23:41:19,278 INFO L226 Difference]: Without dead ends: 2002 [2020-08-21 23:41:19,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 23:41:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2020-08-21 23:41:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1897. [2020-08-21 23:41:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2020-08-21 23:41:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2260 transitions. [2020-08-21 23:41:19,598 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2260 transitions. Word has length 137 [2020-08-21 23:41:19,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:41:19,599 INFO L479 AbstractCegarLoop]: Abstraction has 1897 states and 2260 transitions. [2020-08-21 23:41:19,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 23:41:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2260 transitions. [2020-08-21 23:41:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-21 23:41:19,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:41:19,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:41:19,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:41:19,608 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:41:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:41:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash -671261639, now seen corresponding path program 1 times [2020-08-21 23:41:19,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:41:19,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877669916] [2020-08-21 23:41:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:41:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,885 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:41:19,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:41:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:41:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:41:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:41:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:41:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:41:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 23:41:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 23:41:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:19,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:41:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:41:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 23:41:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 23:41:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:41:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-21 23:41:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-21 23:41:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 23:41:20,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877669916] [2020-08-21 23:41:20,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:41:20,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:41:20,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421156579] [2020-08-21 23:41:20,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:41:20,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:41:20,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:41:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:41:20,088 INFO L87 Difference]: Start difference. First operand 1897 states and 2260 transitions. Second operand 11 states. [2020-08-21 23:41:20,868 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:41:23,110 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:23,394 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:23,664 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 23:41:24,059 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 23:41:24,356 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:41:24,766 INFO L93 Difference]: Finished difference Result 2235 states and 2855 transitions. [2020-08-21 23:41:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 23:41:24,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-08-21 23:41:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:41:24,784 INFO L225 Difference]: With dead ends: 2235 [2020-08-21 23:41:24,784 INFO L226 Difference]: Without dead ends: 2232 [2020-08-21 23:41:24,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:41:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2020-08-21 23:41:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1897. [2020-08-21 23:41:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2020-08-21 23:41:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2250 transitions. [2020-08-21 23:41:25,079 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2250 transitions. Word has length 141 [2020-08-21 23:41:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:41:25,080 INFO L479 AbstractCegarLoop]: Abstraction has 1897 states and 2250 transitions. [2020-08-21 23:41:25,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:41:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2250 transitions. [2020-08-21 23:41:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-21 23:41:25,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:41:25,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:41:25,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:41:25,086 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:41:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:41:25,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1745517035, now seen corresponding path program 1 times [2020-08-21 23:41:25,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:41:25,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685839271] [2020-08-21 23:41:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:41:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,432 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 23:41:25,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:41:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:41:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:41:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:41:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 23:41:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:41:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 23:41:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 23:41:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:41:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 23:41:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 23:41:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 23:41:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:41:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:41:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:41:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-21 23:41:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-21 23:41:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:41:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 23:41:25,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685839271] [2020-08-21 23:41:25,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:41:25,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 23:41:25,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318227631] [2020-08-21 23:41:25,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:41:25,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:41:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:41:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:41:25,674 INFO L87 Difference]: Start difference. First operand 1897 states and 2250 transitions. Second operand 12 states. [2020-08-21 23:41:26,101 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 23:41:27,089 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 23:41:27,368 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:41:27,632 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 23:41:27,870 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186