/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=LOWLEXORDER --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_spec2_product61.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:57:42,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:57:42,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:57:42,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:57:42,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:57:42,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:57:42,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:57:42,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:57:42,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:57:42,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:57:42,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:57:42,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:57:42,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:57:42,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:57:42,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:57:42,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:57:42,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:57:42,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:57:42,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:57:42,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:57:42,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:57:42,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:57:42,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:57:42,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:57:42,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:57:42,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:57:42,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:57:42,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:57:42,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:57:42,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:57:42,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:57:42,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:57:42,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:57:42,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:57:42,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:57:42,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:57:42,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:57:42,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:57:42,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:57:42,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:57:42,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:57:42,131 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 17:57:42,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:57:42,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:57:42,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:57:42,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:57:42,172 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:57:42,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:57:42,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:57:42,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:57:42,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:57:42,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:57:42,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:57:42,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:57:42,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:57:42,175 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:57:42,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:57:42,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:57:42,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:57:42,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:57:42,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:57:42,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:57:42,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:57:42,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:57:42,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:57:42,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:57:42,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:57:42,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:57:42,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:57:42,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:57:42,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:57:42,178 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 17:57:42,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:57:42,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:57:42,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:57:42,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:57:42,517 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:57:42,518 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product61.cil.c [2020-08-21 17:57:42,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7395ab3e5/8b77015b7fbc40eb96b04a0b2dac8e3c/FLAG6cf4e58f8 [2020-08-21 17:57:43,104 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:57:43,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product61.cil.c [2020-08-21 17:57:43,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7395ab3e5/8b77015b7fbc40eb96b04a0b2dac8e3c/FLAG6cf4e58f8 [2020-08-21 17:57:43,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7395ab3e5/8b77015b7fbc40eb96b04a0b2dac8e3c [2020-08-21 17:57:43,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:57:43,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:57:43,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:57:43,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:57:43,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:57:43,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:57:43" (1/1) ... [2020-08-21 17:57:43,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556c1ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:43, skipping insertion in model container [2020-08-21 17:57:43,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:57:43" (1/1) ... [2020-08-21 17:57:43,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:57:43,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:57:43,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:57:43,996 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:57:44,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:57:44,138 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:57:44,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44 WrapperNode [2020-08-21 17:57:44,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:57:44,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:57:44,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:57:44,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:57:44,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (1/1) ... [2020-08-21 17:57:44,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (1/1) ... [2020-08-21 17:57:44,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (1/1) ... [2020-08-21 17:57:44,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (1/1) ... [2020-08-21 17:57:44,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (1/1) ... [2020-08-21 17:57:44,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (1/1) ... [2020-08-21 17:57:44,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (1/1) ... [2020-08-21 17:57:44,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:57:44,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:57:44,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:57:44,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:57:44,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (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 17:57:44,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:57:44,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:57:44,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 17:57:44,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-08-21 17:57:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-08-21 17:57:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 17:57:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 17:57:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 17:57:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 17:57:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:57:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 17:57:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 17:57:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 17:57:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 17:57:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 17:57:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 17:57:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 17:57:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 17:57:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 17:57:44,301 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 17:57:44,301 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 17:57:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 17:57:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 17:57:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 17:57:44,304 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 17:57:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 17:57:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 17:57:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 17:57:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 17:57:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 17:57:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 17:57:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 17:57:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:57:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 17:57:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 17:57:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-21 17:57:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 17:57:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 17:57:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 17:57:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 17:57:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 17:57:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 17:57:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 17:57:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:57:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:57:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 17:57:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 17:57:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 17:57:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 17:57:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 17:57:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 17:57:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 17:57:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 17:57:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:57:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:57:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 17:57:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:57:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 17:57:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 17:57:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:57:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 17:57:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 17:57:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:57:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 17:57:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 17:57:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 17:57:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 17:57:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 17:57:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 17:57:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 17:57:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 17:57:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 17:57:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 17:57:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 17:57:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 17:57:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:57:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 17:57:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 17:57:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 17:57:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-21 17:57:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:57:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 17:57:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:57:45,375 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:57:45,375 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 17:57:45,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:57:45 BoogieIcfgContainer [2020-08-21 17:57:45,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:57:45,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:57:45,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:57:45,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:57:45,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:57:43" (1/3) ... [2020-08-21 17:57:45,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4733414d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:57:45, skipping insertion in model container [2020-08-21 17:57:45,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:57:44" (2/3) ... [2020-08-21 17:57:45,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4733414d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:57:45, skipping insertion in model container [2020-08-21 17:57:45,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:57:45" (3/3) ... [2020-08-21 17:57:45,391 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product61.cil.c [2020-08-21 17:57:45,403 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:57:45,413 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:57:45,429 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:57:45,456 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:57:45,457 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:57:45,457 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:57:45,457 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:57:45,458 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:57:45,458 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:57:45,458 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:57:45,458 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:57:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2020-08-21 17:57:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 17:57:45,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:57:45,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:57:45,496 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:57:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:57:45,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1299073538, now seen corresponding path program 1 times [2020-08-21 17:57:45,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:57:45,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334168378] [2020-08-21 17:57:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:57:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,197 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:57:46,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:57:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:57:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:57:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:57:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:57:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:57:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 17:57:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 17:57:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:46,303 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 17:57:46,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334168378] [2020-08-21 17:57:46,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:57:46,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:57:46,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576729824] [2020-08-21 17:57:46,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:57:46,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:57:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:57:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:57:46,331 INFO L87 Difference]: Start difference. First operand 198 states. Second operand 4 states. [2020-08-21 17:57:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:57:47,704 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2020-08-21 17:57:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:57:47,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 17:57:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:57:47,727 INFO L225 Difference]: With dead ends: 344 [2020-08-21 17:57:47,727 INFO L226 Difference]: Without dead ends: 190 [2020-08-21 17:57:47,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:57:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-21 17:57:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 155. [2020-08-21 17:57:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 17:57:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2020-08-21 17:57:47,871 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 51 [2020-08-21 17:57:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:57:47,872 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2020-08-21 17:57:47,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:57:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2020-08-21 17:57:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 17:57:47,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:57:47,877 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 17:57:47,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:57:47,878 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:57:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:57:47,879 INFO L82 PathProgramCache]: Analyzing trace with hash -155172335, now seen corresponding path program 1 times [2020-08-21 17:57:47,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:57:47,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384681530] [2020-08-21 17:57:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:57:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,261 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:57:48,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:57:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:57:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:57:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:57:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:57:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:57:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:57:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:57:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:48,366 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 17:57:48,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384681530] [2020-08-21 17:57:48,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:57:48,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:57:48,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110846051] [2020-08-21 17:57:48,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:57:48,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:57:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:57:48,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:57:48,372 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand 5 states. [2020-08-21 17:57:48,859 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:57:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:57:50,003 INFO L93 Difference]: Finished difference Result 289 states and 359 transitions. [2020-08-21 17:57:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:57:50,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-21 17:57:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:57:50,010 INFO L225 Difference]: With dead ends: 289 [2020-08-21 17:57:50,011 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 17:57:50,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:57:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 17:57:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 146. [2020-08-21 17:57:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 17:57:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2020-08-21 17:57:50,089 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 52 [2020-08-21 17:57:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:57:50,090 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2020-08-21 17:57:50,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:57:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2020-08-21 17:57:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 17:57:50,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:57:50,103 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] [2020-08-21 17:57:50,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:57:50,103 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:57:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:57:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1504957008, now seen corresponding path program 1 times [2020-08-21 17:57:50,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:57:50,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992181217] [2020-08-21 17:57:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:57:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,467 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:57:50,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:57:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:57:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:57:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:57:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:57:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:57:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 17:57:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:57:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:50,550 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 17:57:50,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992181217] [2020-08-21 17:57:50,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:57:50,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:57:50,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27797577] [2020-08-21 17:57:50,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:57:50,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:57:50,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:57:50,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:57:50,552 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand 9 states. [2020-08-21 17:57:50,969 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:57:51,278 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:57:51,536 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:57:51,776 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:57:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:57:53,287 INFO L93 Difference]: Finished difference Result 298 states and 374 transitions. [2020-08-21 17:57:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:57:53,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-21 17:57:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:57:53,295 INFO L225 Difference]: With dead ends: 298 [2020-08-21 17:57:53,295 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 17:57:53,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:57:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 17:57:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 146. [2020-08-21 17:57:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 17:57:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 172 transitions. [2020-08-21 17:57:53,361 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 172 transitions. Word has length 56 [2020-08-21 17:57:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:57:53,363 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 172 transitions. [2020-08-21 17:57:53,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:57:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 172 transitions. [2020-08-21 17:57:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 17:57:53,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:57:53,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:57:53,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:57:53,367 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:57:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:57:53,367 INFO L82 PathProgramCache]: Analyzing trace with hash -775636071, now seen corresponding path program 1 times [2020-08-21 17:57:53,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:57:53,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92836264] [2020-08-21 17:57:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:57:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,735 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:57:53,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:57:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:57:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:57:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:57:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:57:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:57:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:57:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:57:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:57:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:57:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 17:57:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 17:57:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:53,870 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 17:57:53,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92836264] [2020-08-21 17:57:53,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:57:53,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:57:53,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269348657] [2020-08-21 17:57:53,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:57:53,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:57:53,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:57:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:57:53,873 INFO L87 Difference]: Start difference. First operand 146 states and 172 transitions. Second operand 7 states. [2020-08-21 17:57:54,242 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:57:55,502 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:57:56,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:57:56,451 INFO L93 Difference]: Finished difference Result 403 states and 508 transitions. [2020-08-21 17:57:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:57:56,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-08-21 17:57:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:57:56,456 INFO L225 Difference]: With dead ends: 403 [2020-08-21 17:57:56,456 INFO L226 Difference]: Without dead ends: 285 [2020-08-21 17:57:56,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:57:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-08-21 17:57:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 239. [2020-08-21 17:57:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-08-21 17:57:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 274 transitions. [2020-08-21 17:57:56,511 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 274 transitions. Word has length 74 [2020-08-21 17:57:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:57:56,512 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 274 transitions. [2020-08-21 17:57:56,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:57:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 274 transitions. [2020-08-21 17:57:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 17:57:56,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:57:56,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:57:56,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:57:56,514 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:57:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:57:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2094752105, now seen corresponding path program 1 times [2020-08-21 17:57:56,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:57:56,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857410255] [2020-08-21 17:57:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:57:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,797 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:57:56,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:57:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:57:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:57:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:57:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:57:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:57:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:57:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:57:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:57:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:57:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:57:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:57:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 17:57:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 17:57:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:57:56,926 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 17:57:56,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857410255] [2020-08-21 17:57:56,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:57:56,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:57:56,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241791489] [2020-08-21 17:57:56,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:57:56,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:57:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:57:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:57:56,929 INFO L87 Difference]: Start difference. First operand 239 states and 274 transitions. Second operand 9 states. [2020-08-21 17:57:57,294 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:57:58,328 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:57:58,656 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:57:59,301 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:57:59,527 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:00,838 INFO L93 Difference]: Finished difference Result 708 states and 878 transitions. [2020-08-21 17:58:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 17:58:00,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-08-21 17:58:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:00,845 INFO L225 Difference]: With dead ends: 708 [2020-08-21 17:58:00,846 INFO L226 Difference]: Without dead ends: 497 [2020-08-21 17:58:00,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-21 17:58:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-08-21 17:58:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 426. [2020-08-21 17:58:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-08-21 17:58:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 488 transitions. [2020-08-21 17:58:00,946 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 488 transitions. Word has length 88 [2020-08-21 17:58:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:00,947 INFO L479 AbstractCegarLoop]: Abstraction has 426 states and 488 transitions. [2020-08-21 17:58:00,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:58:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 488 transitions. [2020-08-21 17:58:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 17:58:00,949 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:00,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:58:00,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:58:00,949 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:00,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1169136517, now seen corresponding path program 1 times [2020-08-21 17:58:00,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:00,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297365751] [2020-08-21 17:58:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,228 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:58:01,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:58:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:58:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:58:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:58:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 17:58:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-21 17:58:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:01,335 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 17:58:01,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297365751] [2020-08-21 17:58:01,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:58:01,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 17:58:01,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832185093] [2020-08-21 17:58:01,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:58:01,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:58:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:58:01,337 INFO L87 Difference]: Start difference. First operand 426 states and 488 transitions. Second operand 10 states. [2020-08-21 17:58:01,717 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:58:03,014 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:58:04,226 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:04,464 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:04,717 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:05,137 INFO L93 Difference]: Finished difference Result 930 states and 1135 transitions. [2020-08-21 17:58:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 17:58:05,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 17:58:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:05,144 INFO L225 Difference]: With dead ends: 930 [2020-08-21 17:58:05,144 INFO L226 Difference]: Without dead ends: 532 [2020-08-21 17:58:05,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-08-21 17:58:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-08-21 17:58:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 425. [2020-08-21 17:58:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-08-21 17:58:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 485 transitions. [2020-08-21 17:58:05,229 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 485 transitions. Word has length 92 [2020-08-21 17:58:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:05,230 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 485 transitions. [2020-08-21 17:58:05,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:58:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 485 transitions. [2020-08-21 17:58:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 17:58:05,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:05,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:58:05,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:58:05,233 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1253770304, now seen corresponding path program 1 times [2020-08-21 17:58:05,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:05,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710165073] [2020-08-21 17:58:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,480 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:58:05,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:58:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:58:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:58:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:58:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 17:58:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 17:58:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 17:58:05,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710165073] [2020-08-21 17:58:05,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:58:05,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 17:58:05,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915407267] [2020-08-21 17:58:05,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:58:05,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:58:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:58:05,641 INFO L87 Difference]: Start difference. First operand 425 states and 485 transitions. Second operand 10 states. [2020-08-21 17:58:06,572 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:06,815 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 17:58:07,066 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:07,313 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:08,691 INFO L93 Difference]: Finished difference Result 937 states and 1168 transitions. [2020-08-21 17:58:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 17:58:08,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-08-21 17:58:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:08,700 INFO L225 Difference]: With dead ends: 937 [2020-08-21 17:58:08,700 INFO L226 Difference]: Without dead ends: 540 [2020-08-21 17:58:08,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:58:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-08-21 17:58:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 435. [2020-08-21 17:58:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-08-21 17:58:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 495 transitions. [2020-08-21 17:58:08,822 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 495 transitions. Word has length 108 [2020-08-21 17:58:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:08,822 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 495 transitions. [2020-08-21 17:58:08,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:58:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 495 transitions. [2020-08-21 17:58:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 17:58:08,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:08,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:58:08,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:58:08,826 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:08,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:08,826 INFO L82 PathProgramCache]: Analyzing trace with hash 685391742, now seen corresponding path program 1 times [2020-08-21 17:58:08,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:08,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373413877] [2020-08-21 17:58:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,124 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:58:09,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:58:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:58:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:58:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:58:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 17:58:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 17:58:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 17:58:09,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373413877] [2020-08-21 17:58:09,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:58:09,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 17:58:09,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647997677] [2020-08-21 17:58:09,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:58:09,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:09,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:58:09,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:58:09,324 INFO L87 Difference]: Start difference. First operand 435 states and 495 transitions. Second operand 12 states. [2020-08-21 17:58:10,130 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:10,469 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:10,851 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:11,579 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:11,844 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:12,102 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:58:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:13,742 INFO L93 Difference]: Finished difference Result 957 states and 1190 transitions. [2020-08-21 17:58:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:58:13,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 108 [2020-08-21 17:58:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:13,748 INFO L225 Difference]: With dead ends: 957 [2020-08-21 17:58:13,749 INFO L226 Difference]: Without dead ends: 550 [2020-08-21 17:58:13,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-21 17:58:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-08-21 17:58:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 443. [2020-08-21 17:58:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-08-21 17:58:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2020-08-21 17:58:13,868 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 108 [2020-08-21 17:58:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:13,871 INFO L479 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2020-08-21 17:58:13,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:58:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2020-08-21 17:58:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 17:58:13,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:13,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:58:13,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:58:13,878 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1454561757, now seen corresponding path program 1 times [2020-08-21 17:58:13,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:13,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102854697] [2020-08-21 17:58:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,156 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:58:14,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:58:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:58:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:58:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:58:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 17:58:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 17:58:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 17:58:14,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102854697] [2020-08-21 17:58:14,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:58:14,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:58:14,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992475902] [2020-08-21 17:58:14,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:58:14,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:58:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:58:14,410 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand 8 states. [2020-08-21 17:58:15,036 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:58:15,662 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:58:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:18,381 INFO L93 Difference]: Finished difference Result 1296 states and 1667 transitions. [2020-08-21 17:58:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 17:58:18,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 108 [2020-08-21 17:58:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:18,389 INFO L225 Difference]: With dead ends: 1296 [2020-08-21 17:58:18,390 INFO L226 Difference]: Without dead ends: 881 [2020-08-21 17:58:18,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:58:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-08-21 17:58:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 749. [2020-08-21 17:58:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-08-21 17:58:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 881 transitions. [2020-08-21 17:58:18,613 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 881 transitions. Word has length 108 [2020-08-21 17:58:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:18,613 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 881 transitions. [2020-08-21 17:58:18,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:58:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 881 transitions. [2020-08-21 17:58:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-21 17:58:18,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:18,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:58:18,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:58:18,619 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1438503063, now seen corresponding path program 1 times [2020-08-21 17:58:18,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:18,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001754245] [2020-08-21 17:58:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,032 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:58:19,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:58:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:58:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:58:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:58:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:58:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 17:58:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-21 17:58:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 17:58:19,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001754245] [2020-08-21 17:58:19,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:58:19,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 17:58:19,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721001738] [2020-08-21 17:58:19,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 17:58:19,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:19,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 17:58:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:58:19,316 INFO L87 Difference]: Start difference. First operand 749 states and 881 transitions. Second operand 18 states. [2020-08-21 17:58:20,050 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:58:20,444 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 17:58:20,701 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 17:58:20,953 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 17:58:21,614 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:58:22,608 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:22,939 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:23,209 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:23,487 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:23,822 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:24,101 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:24,649 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-08-21 17:58:25,216 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-08-21 17:58:28,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:28,035 INFO L93 Difference]: Finished difference Result 1572 states and 1938 transitions. [2020-08-21 17:58:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-21 17:58:28,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2020-08-21 17:58:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:28,040 INFO L225 Difference]: With dead ends: 1572 [2020-08-21 17:58:28,040 INFO L226 Difference]: Without dead ends: 851 [2020-08-21 17:58:28,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=503, Invalid=2149, Unknown=0, NotChecked=0, Total=2652 [2020-08-21 17:58:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-08-21 17:58:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 728. [2020-08-21 17:58:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 728 states. [2020-08-21 17:58:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 846 transitions. [2020-08-21 17:58:28,196 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 846 transitions. Word has length 112 [2020-08-21 17:58:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:28,197 INFO L479 AbstractCegarLoop]: Abstraction has 728 states and 846 transitions. [2020-08-21 17:58:28,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 17:58:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 846 transitions. [2020-08-21 17:58:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-21 17:58:28,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:28,201 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:58:28,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:58:28,202 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:28,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2045020006, now seen corresponding path program 1 times [2020-08-21 17:58:28,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:28,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83747006] [2020-08-21 17:58:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,507 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:58:28,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 17:58:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:58:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:58:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:58:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 17:58:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-21 17:58:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-21 17:58:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 17:58:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 17:58:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:58:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 17:58:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:58:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-21 17:58:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-08-21 17:58:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-21 17:58:28,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83747006] [2020-08-21 17:58:28,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:58:28,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 17:58:28,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485077431] [2020-08-21 17:58:28,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 17:58:28,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 17:58:28,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:58:28,877 INFO L87 Difference]: Start difference. First operand 728 states and 846 transitions. Second operand 19 states. [2020-08-21 17:58:29,495 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:58:29,882 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 17:58:30,165 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 17:58:30,435 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 17:58:31,115 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:58:32,220 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:32,573 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:32,863 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:33,163 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:33,530 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:33,818 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:35,079 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:35,340 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:35,609 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:35,855 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:58:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:36,988 INFO L93 Difference]: Finished difference Result 1341 states and 1663 transitions. [2020-08-21 17:58:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-21 17:58:36,989 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 181 [2020-08-21 17:58:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:36,990 INFO L225 Difference]: With dead ends: 1341 [2020-08-21 17:58:36,990 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:58:36,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=539, Invalid=2541, Unknown=0, NotChecked=0, Total=3080 [2020-08-21 17:58:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:58:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:58:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:58:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:58:36,996 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 181 [2020-08-21 17:58:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:36,996 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:58:36,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 17:58:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:58:36,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:58:36,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:58:36,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:58:39,121 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 310 DAG size of output: 247 [2020-08-21 17:58:39,409 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 207