/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:01:39,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:01:39,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:01:39,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:01:39,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:01:39,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:01:39,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:01:39,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:01:39,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:01:39,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:01:39,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:01:39,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:01:39,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:01:39,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:01:39,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:01:39,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:01:39,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:01:39,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:01:39,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:01:39,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:01:39,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:01:39,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:01:39,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:01:39,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:01:39,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:01:39,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:01:39,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:01:39,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:01:39,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:01:39,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 12:01:39,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 12:01:39,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 12:01:39,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 12:01:39,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 12:01:39,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 12:01:39,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 12:01:39,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 12:01:39,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 12:01:39,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:01:39,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:01:39,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:01:39,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:01:39,139 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:01:39,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:01:39,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:01:39,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:01:39,144 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:01:39,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:01:39,144 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:01:39,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:01:39,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:01:39,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:01:39,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:01:39,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:01:39,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:01:39,145 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:01:39,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:01:39,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:01:39,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:01:39,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:01:39,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:01:39,147 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:01:39,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:01:39,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:01:39,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:01:39,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:01:39,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:01:39,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:01:39,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:01:39,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:01:39,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:01:39,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:01:39,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:01:39,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:01:39,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:01:39,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:01:39,502 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:01:39,503 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c [2020-08-18 12:01:39,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911d08cb5/8a72c3be5fd1474db71c9e76bb560252/FLAG62116d5f0 [2020-08-18 12:01:40,108 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:01:40,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_productSimulator.cil.c [2020-08-18 12:01:40,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911d08cb5/8a72c3be5fd1474db71c9e76bb560252/FLAG62116d5f0 [2020-08-18 12:01:40,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911d08cb5/8a72c3be5fd1474db71c9e76bb560252 [2020-08-18 12:01:40,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:01:40,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:01:40,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:01:40,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:01:40,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:01:40,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:01:40" (1/1) ... [2020-08-18 12:01:40,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74dd964f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:40, skipping insertion in model container [2020-08-18 12:01:40,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:01:40" (1/1) ... [2020-08-18 12:01:40,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:01:40,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:01:40,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:01:40,935 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:01:41,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:01:41,116 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:01:41,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41 WrapperNode [2020-08-18 12:01:41,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:01:41,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:01:41,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:01:41,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:01:41,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (1/1) ... [2020-08-18 12:01:41,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (1/1) ... [2020-08-18 12:01:41,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (1/1) ... [2020-08-18 12:01:41,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (1/1) ... [2020-08-18 12:01:41,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (1/1) ... [2020-08-18 12:01:41,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (1/1) ... [2020-08-18 12:01:41,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (1/1) ... [2020-08-18 12:01:41,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:01:41,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:01:41,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:01:41,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:01:41,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:01:41,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:01:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:01:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 12:01:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 12:01:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 12:01:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 12:01:41,293 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 12:01:41,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:01:41,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 12:01:41,294 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 12:01:41,294 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2020-08-18 12:01:41,294 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__highWaterSensor [2020-08-18 12:01:41,294 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2020-08-18 12:01:41,295 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__lowWaterSensor [2020-08-18 12:01:41,295 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2020-08-18 12:01:41,295 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__methaneAlarm [2020-08-18 12:01:41,295 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 12:01:41,295 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2020-08-18 12:01:41,295 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__role__methaneQuery [2020-08-18 12:01:41,296 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 12:01:41,296 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 12:01:41,296 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 12:01:41,296 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 12:01:41,296 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 12:01:41,296 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 12:01:41,297 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 12:01:41,297 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 12:01:41,297 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 12:01:41,297 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 12:01:41,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 12:01:41,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 12:01:41,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 12:01:41,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 12:01:41,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 12:01:41,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 12:01:41,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 12:01:41,298 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 12:01:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 12:01:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 12:01:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 12:01:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 12:01:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 12:01:41,299 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 12:01:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 12:01:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 12:01:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 12:01:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 12:01:41,300 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 12:01:41,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:01:41,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:01:41,301 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 12:01:41,301 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 12:01:41,301 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 12:01:41,301 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 12:01:41,301 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 12:01:41,302 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 12:01:41,302 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 12:01:41,302 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 12:01:41,302 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 12:01:41,302 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 12:01:41,302 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 12:01:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 12:01:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 12:01:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:01:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 12:01:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 12:01:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 12:01:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 12:01:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 12:01:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 12:01:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 12:01:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 12:01:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 12:01:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 12:01:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 12:01:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 12:01:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 12:01:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 12:01:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2020-08-18 12:01:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 12:01:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__highWaterSensor [2020-08-18 12:01:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2020-08-18 12:01:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 12:01:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__lowWaterSensor [2020-08-18 12:01:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2020-08-18 12:01:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 12:01:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__methaneAlarm [2020-08-18 12:01:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2020-08-18 12:01:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__role__methaneQuery [2020-08-18 12:01:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 12:01:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 12:01:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 12:01:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 12:01:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 12:01:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 12:01:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 12:01:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 12:01:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 12:01:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 12:01:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 12:01:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 12:01:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 12:01:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 12:01:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 12:01:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 12:01:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 12:01:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 12:01:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:01:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 12:01:41,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:01:42,379 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:01:42,380 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 12:01:42,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:01:42 BoogieIcfgContainer [2020-08-18 12:01:42,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:01:42,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:01:42,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:01:42,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:01:42,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:01:40" (1/3) ... [2020-08-18 12:01:42,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6554fead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:01:42, skipping insertion in model container [2020-08-18 12:01:42,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:01:41" (2/3) ... [2020-08-18 12:01:42,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6554fead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:01:42, skipping insertion in model container [2020-08-18 12:01:42,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:01:42" (3/3) ... [2020-08-18 12:01:42,395 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_productSimulator.cil.c [2020-08-18 12:01:42,406 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:01:42,415 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:01:42,429 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:01:42,455 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:01:42,455 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:01:42,455 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:01:42,456 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:01:42,456 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:01:42,456 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:01:42,456 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:01:42,457 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:01:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states. [2020-08-18 12:01:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 12:01:42,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:42,495 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:01:42,495 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash 88276295, now seen corresponding path program 1 times [2020-08-18 12:01:42,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:42,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600182111] [2020-08-18 12:01:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,300 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-18 12:01:43,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:01:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:01:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:01:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:01:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:01:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:01:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:01:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 12:01:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 12:01:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 12:01:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-18 12:01:43,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600182111] [2020-08-18 12:01:43,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:43,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:01:43,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412491514] [2020-08-18 12:01:43,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:01:43,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:43,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:01:43,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:01:43,517 INFO L87 Difference]: Start difference. First operand 245 states. Second operand 5 states. [2020-08-18 12:01:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:45,777 INFO L93 Difference]: Finished difference Result 442 states and 581 transitions. [2020-08-18 12:01:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:01:45,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-08-18 12:01:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:45,797 INFO L225 Difference]: With dead ends: 442 [2020-08-18 12:01:45,798 INFO L226 Difference]: Without dead ends: 251 [2020-08-18 12:01:45,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:01:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-08-18 12:01:45,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 202. [2020-08-18 12:01:45,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-18 12:01:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 247 transitions. [2020-08-18 12:01:45,925 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 247 transitions. Word has length 78 [2020-08-18 12:01:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:45,926 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 247 transitions. [2020-08-18 12:01:45,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:01:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 247 transitions. [2020-08-18 12:01:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 12:01:45,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:45,932 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:01:45,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:01:45,932 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash 128874418, now seen corresponding path program 1 times [2020-08-18 12:01:45,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:45,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096512293] [2020-08-18 12:01:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,299 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-18 12:01:46,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:01:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:01:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:01:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:01:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:01:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:01:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:01:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 12:01:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 12:01:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 12:01:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-18 12:01:46,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096512293] [2020-08-18 12:01:46,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:46,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:01:46,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162915215] [2020-08-18 12:01:46,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:01:46,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:46,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:01:46,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:01:46,402 INFO L87 Difference]: Start difference. First operand 202 states and 247 transitions. Second operand 6 states. [2020-08-18 12:01:47,160 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-18 12:01:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:48,915 INFO L93 Difference]: Finished difference Result 366 states and 459 transitions. [2020-08-18 12:01:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 12:01:48,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-08-18 12:01:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:48,924 INFO L225 Difference]: With dead ends: 366 [2020-08-18 12:01:48,925 INFO L226 Difference]: Without dead ends: 235 [2020-08-18 12:01:48,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:01:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-18 12:01:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2020-08-18 12:01:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-08-18 12:01:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2020-08-18 12:01:48,979 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 79 [2020-08-18 12:01:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:48,979 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2020-08-18 12:01:48,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:01:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2020-08-18 12:01:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 12:01:48,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:48,982 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:01:48,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:01:48,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2075074883, now seen corresponding path program 1 times [2020-08-18 12:01:48,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:48,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250816371] [2020-08-18 12:01:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,376 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-18 12:01:49,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:01:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:01:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:01:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:01:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:01:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:01:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:01:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 12:01:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 12:01:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 12:01:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-18 12:01:49,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250816371] [2020-08-18 12:01:49,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:49,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 12:01:49,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493908091] [2020-08-18 12:01:49,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:01:49,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:49,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:01:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:01:49,540 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand 12 states. [2020-08-18 12:01:50,102 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-18 12:01:50,785 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 211 [2020-08-18 12:01:51,582 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-18 12:01:52,619 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-18 12:01:53,039 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-08-18 12:01:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:01:56,791 INFO L93 Difference]: Finished difference Result 628 states and 796 transitions. [2020-08-18 12:01:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 12:01:56,792 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-08-18 12:01:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:01:56,798 INFO L225 Difference]: With dead ends: 628 [2020-08-18 12:01:56,798 INFO L226 Difference]: Without dead ends: 476 [2020-08-18 12:01:56,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-08-18 12:01:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-08-18 12:01:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 385. [2020-08-18 12:01:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-08-18 12:01:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 480 transitions. [2020-08-18 12:01:56,911 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 480 transitions. Word has length 84 [2020-08-18 12:01:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:01:56,911 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 480 transitions. [2020-08-18 12:01:56,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 12:01:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 480 transitions. [2020-08-18 12:01:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-18 12:01:56,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:01:56,915 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:01:56,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:01:56,915 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:01:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:01:56,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1129127896, now seen corresponding path program 1 times [2020-08-18 12:01:56,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:01:56,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189520796] [2020-08-18 12:01:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:01:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,295 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-18 12:01:57,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:01:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:01:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:01:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:01:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:01:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:01:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:01:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:01:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:01:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 12:01:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 12:01:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 12:01:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 12:01:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:01:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-18 12:01:57,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189520796] [2020-08-18 12:01:57,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:01:57,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-18 12:01:57,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642372299] [2020-08-18 12:01:57,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 12:01:57,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:01:57,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 12:01:57,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-08-18 12:01:57,534 INFO L87 Difference]: Start difference. First operand 385 states and 480 transitions. Second operand 16 states. [2020-08-18 12:01:58,242 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-18 12:01:58,968 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 211 [2020-08-18 12:01:59,793 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-18 12:02:00,656 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-08-18 12:02:01,581 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-18 12:02:02,738 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 213 [2020-08-18 12:02:03,574 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-08-18 12:02:04,332 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2020-08-18 12:02:04,672 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-08-18 12:02:05,033 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-08-18 12:02:05,552 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-08-18 12:02:05,985 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-08-18 12:02:06,492 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-08-18 12:02:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:02:10,972 INFO L93 Difference]: Finished difference Result 1582 states and 2206 transitions. [2020-08-18 12:02:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 12:02:10,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-08-18 12:02:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:02:10,989 INFO L225 Difference]: With dead ends: 1582 [2020-08-18 12:02:10,989 INFO L226 Difference]: Without dead ends: 1238 [2020-08-18 12:02:10,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 12:02:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2020-08-18 12:02:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1109. [2020-08-18 12:02:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-08-18 12:02:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1462 transitions. [2020-08-18 12:02:11,314 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1462 transitions. Word has length 90 [2020-08-18 12:02:11,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:02:11,314 INFO L479 AbstractCegarLoop]: Abstraction has 1109 states and 1462 transitions. [2020-08-18 12:02:11,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 12:02:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1462 transitions. [2020-08-18 12:02:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 12:02:11,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:02:11,319 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:02:11,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:02:11,320 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:02:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:02:11,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1905240978, now seen corresponding path program 1 times [2020-08-18 12:02:11,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:02:11,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012906433] [2020-08-18 12:02:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:02:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,627 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-18 12:02:11,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:02:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:02:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:02:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:02:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:02:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:02:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 12:02:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 12:02:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 12:02:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 12:02:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 12:02:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-18 12:02:11,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012906433] [2020-08-18 12:02:11,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:02:11,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 12:02:11,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702756348] [2020-08-18 12:02:11,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:02:11,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:02:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:02:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:02:11,795 INFO L87 Difference]: Start difference. First operand 1109 states and 1462 transitions. Second operand 8 states. [2020-08-18 12:02:12,217 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-18 12:02:15,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:02:15,865 INFO L93 Difference]: Finished difference Result 2674 states and 3837 transitions. [2020-08-18 12:02:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 12:02:15,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-08-18 12:02:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:02:15,881 INFO L225 Difference]: With dead ends: 2674 [2020-08-18 12:02:15,881 INFO L226 Difference]: Without dead ends: 1606 [2020-08-18 12:02:15,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-18 12:02:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2020-08-18 12:02:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1507. [2020-08-18 12:02:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2020-08-18 12:02:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2004 transitions. [2020-08-18 12:02:16,366 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2004 transitions. Word has length 94 [2020-08-18 12:02:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:02:16,367 INFO L479 AbstractCegarLoop]: Abstraction has 1507 states and 2004 transitions. [2020-08-18 12:02:16,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:02:16,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2004 transitions. [2020-08-18 12:02:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 12:02:16,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:02:16,371 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-08-18 12:02:16,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:02:16,371 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:02:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:02:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash -509299228, now seen corresponding path program 1 times [2020-08-18 12:02:16,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:02:16,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704621895] [2020-08-18 12:02:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:02:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,720 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-18 12:02:16,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:02:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:02:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:02:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:02:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:02:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:02:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 12:02:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 12:02:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 12:02:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 12:02:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 12:02:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-18 12:02:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 12:02:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-08-18 12:02:16,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704621895] [2020-08-18 12:02:16,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:02:16,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 12:02:16,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007444307] [2020-08-18 12:02:16,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:02:16,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:02:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:02:16,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:02:16,914 INFO L87 Difference]: Start difference. First operand 1507 states and 2004 transitions. Second operand 12 states. [2020-08-18 12:02:17,661 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 210 [2020-08-18 12:02:18,562 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-18 12:02:21,989 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-18 12:02:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:02:25,963 INFO L93 Difference]: Finished difference Result 2888 states and 4054 transitions. [2020-08-18 12:02:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 12:02:25,964 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2020-08-18 12:02:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:02:25,977 INFO L225 Difference]: With dead ends: 2888 [2020-08-18 12:02:25,977 INFO L226 Difference]: Without dead ends: 1787 [2020-08-18 12:02:25,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 12:02:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2020-08-18 12:02:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1658. [2020-08-18 12:02:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2020-08-18 12:02:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2197 transitions. [2020-08-18 12:02:26,362 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2197 transitions. Word has length 122 [2020-08-18 12:02:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:02:26,365 INFO L479 AbstractCegarLoop]: Abstraction has 1658 states and 2197 transitions. [2020-08-18 12:02:26,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 12:02:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2197 transitions. [2020-08-18 12:02:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-18 12:02:26,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:02:26,376 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 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] [2020-08-18 12:02:26,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:02:26,376 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:02:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:02:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1658452204, now seen corresponding path program 1 times [2020-08-18 12:02:26,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:02:26,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399774448] [2020-08-18 12:02:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:02:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,757 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-18 12:02:26,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:02:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:02:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:02:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:02:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:02:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:02:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 12:02:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 12:02:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:26,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 12:02:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-18 12:02:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-18 12:02:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-18 12:02:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 12:02:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-08-18 12:02:27,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399774448] [2020-08-18 12:02:27,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:02:27,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 12:02:27,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294476594] [2020-08-18 12:02:27,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:02:27,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:02:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:02:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:02:27,183 INFO L87 Difference]: Start difference. First operand 1658 states and 2197 transitions. Second operand 12 states. [2020-08-18 12:02:29,416 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-08-18 12:02:29,745 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-08-18 12:02:30,055 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-18 12:02:30,366 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-08-18 12:02:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:02:32,329 INFO L93 Difference]: Finished difference Result 3445 states and 4958 transitions. [2020-08-18 12:02:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:02:32,329 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2020-08-18 12:02:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:02:32,342 INFO L225 Difference]: With dead ends: 3445 [2020-08-18 12:02:32,343 INFO L226 Difference]: Without dead ends: 1828 [2020-08-18 12:02:32,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:02:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-08-18 12:02:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1688. [2020-08-18 12:02:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-08-18 12:02:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2231 transitions. [2020-08-18 12:02:32,845 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2231 transitions. Word has length 166 [2020-08-18 12:02:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:02:32,845 INFO L479 AbstractCegarLoop]: Abstraction has 1688 states and 2231 transitions. [2020-08-18 12:02:32,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 12:02:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2231 transitions. [2020-08-18 12:02:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-08-18 12:02:32,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:02:32,852 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 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] [2020-08-18 12:02:32,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:02:32,852 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:02:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:02:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash 47025257, now seen corresponding path program 1 times [2020-08-18 12:02:32,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:02:32,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344231260] [2020-08-18 12:02:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:02:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,196 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-08-18 12:02:33,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:02:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:02:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:02:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:02:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:02:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 12:02:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 12:02:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 12:02:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 12:02:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 12:02:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:02:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:02:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 12:02:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-18 12:02:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 12:02:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:02:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-18 12:02:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-08-18 12:02:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:02:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-18 12:02:33,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344231260] [2020-08-18 12:02:33,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:02:33,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:02:33,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616674673] [2020-08-18 12:02:33,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:02:33,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:02:33,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:02:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:02:33,453 INFO L87 Difference]: Start difference. First operand 1688 states and 2231 transitions. Second operand 10 states. [2020-08-18 12:02:34,065 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-08-18 12:02:35,202 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 211