/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=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec5_product39.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:12:38,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:12:38,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:12:39,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:12:39,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:12:39,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:12:39,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:12:39,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:12:39,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:12:39,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:12:39,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:12:39,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:12:39,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:12:39,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:12:39,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:12:39,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:12:39,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:12:39,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:12:39,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:12:39,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:12:39,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:12:39,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:12:39,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:12:39,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:12:39,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:12:39,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:12:39,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:12:39,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:12:39,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:12:39,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:12:39,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:12:39,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:12:39,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:12:39,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:12:39,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:12:39,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:12:39,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:12:39,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:12:39,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:12:39,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:12:39,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:12:39,129 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 20:12:39,167 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:12:39,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:12:39,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:12:39,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:12:39,169 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:12:39,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:12:39,170 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:12:39,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:12:39,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:12:39,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:12:39,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:12:39,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:12:39,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:12:39,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:12:39,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:12:39,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:12:39,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:12:39,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:12:39,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:12:39,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:12:39,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:12:39,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:12:39,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:12:39,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:12:39,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:12:39,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:12:39,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:12:39,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:12:39,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:12:39,176 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=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:12:39,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:12:39,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:12:39,511 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:12:39,512 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:12:39,513 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:12:39,514 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product39.cil.c [2020-08-18 20:12:39,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73fe237a6/ebc3fc0e0a184aae851a3182ba25e0ce/FLAG7e2ba52d5 [2020-08-18 20:12:40,085 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:12:40,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec5_product39.cil.c [2020-08-18 20:12:40,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73fe237a6/ebc3fc0e0a184aae851a3182ba25e0ce/FLAG7e2ba52d5 [2020-08-18 20:12:40,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73fe237a6/ebc3fc0e0a184aae851a3182ba25e0ce [2020-08-18 20:12:40,430 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:12:40,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:12:40,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:12:40,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:12:40,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:12:40,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:12:40" (1/1) ... [2020-08-18 20:12:40,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750e1b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:40, skipping insertion in model container [2020-08-18 20:12:40,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:12:40" (1/1) ... [2020-08-18 20:12:40,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:12:40,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:12:40,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:12:40,973 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:12:41,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:12:41,105 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:12:41,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41 WrapperNode [2020-08-18 20:12:41,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:12:41,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:12:41,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:12:41,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:12:41,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (1/1) ... [2020-08-18 20:12:41,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (1/1) ... [2020-08-18 20:12:41,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (1/1) ... [2020-08-18 20:12:41,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (1/1) ... [2020-08-18 20:12:41,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (1/1) ... [2020-08-18 20:12:41,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (1/1) ... [2020-08-18 20:12:41,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (1/1) ... [2020-08-18 20:12:41,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:12:41,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:12:41,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:12:41,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:12:41,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (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 20:12:41,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:12:41,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:12:41,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 20:12:41,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 20:12:41,263 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 20:12:41,264 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 20:12:41,264 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 20:12:41,264 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 20:12:41,264 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 20:12:41,264 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 20:12:41,264 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 20:12:41,264 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 20:12:41,265 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 20:12:41,265 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 20:12:41,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 20:12:41,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 20:12:41,265 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 20:12:41,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 20:12:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 20:12:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 20:12:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 20:12:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 20:12:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 20:12:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:12:41,267 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 20:12:41,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2020-08-18 20:12:41,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2020-08-18 20:12:41,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2020-08-18 20:12:41,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 20:12:41,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 20:12:41,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 20:12:41,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 20:12:41,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 20:12:41,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 20:12:41,274 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 20:12:41,274 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 20:12:41,274 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 20:12:41,274 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 20:12:41,274 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 20:12:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 20:12:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 20:12:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:12:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:12:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 20:12:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 20:12:41,276 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 20:12:41,277 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 20:12:41,277 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 20:12:41,277 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 20:12:41,278 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 20:12:41,278 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 20:12:41,278 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 20:12:41,278 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 20:12:41,278 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 20:12:41,278 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 20:12:41,278 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 20:12:41,278 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 20:12:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 20:12:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 20:12:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2020-08-18 20:12:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2020-08-18 20:12:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 20:12:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 20:12:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 20:12:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2020-08-18 20:12:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 20:12:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 20:12:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:12:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 20:12:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 20:12:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:12:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 20:12:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 20:12:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:12:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:12:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:12:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:12:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 20:12:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 20:12:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:12:42,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:12:42,331 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 20:12:42,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:12:42 BoogieIcfgContainer [2020-08-18 20:12:42,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:12:42,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:12:42,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:12:42,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:12:42,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:12:40" (1/3) ... [2020-08-18 20:12:42,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1004480a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:12:42, skipping insertion in model container [2020-08-18 20:12:42,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:12:41" (2/3) ... [2020-08-18 20:12:42,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1004480a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:12:42, skipping insertion in model container [2020-08-18 20:12:42,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:12:42" (3/3) ... [2020-08-18 20:12:42,345 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product39.cil.c [2020-08-18 20:12:42,356 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:12:42,364 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:12:42,379 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:12:42,405 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:12:42,405 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:12:42,406 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:12:42,406 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:12:42,406 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:12:42,406 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:12:42,407 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:12:42,407 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:12:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states. [2020-08-18 20:12:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 20:12:42,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:12:42,443 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:12:42,443 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:12:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:12:42,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1474572721, now seen corresponding path program 1 times [2020-08-18 20:12:42,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:12:42,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614587676] [2020-08-18 20:12:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:12:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,235 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:12:43,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:12:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:12:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:12:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:12:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:12:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:12:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 20:12:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 20:12:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 20:12:43,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614587676] [2020-08-18 20:12:43,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:12:43,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 20:12:43,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750583272] [2020-08-18 20:12:43,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 20:12:43,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:12:43,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 20:12:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:12:43,363 INFO L87 Difference]: Start difference. First operand 185 states. Second operand 4 states. [2020-08-18 20:12:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:12:44,601 INFO L93 Difference]: Finished difference Result 314 states and 404 transitions. [2020-08-18 20:12:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 20:12:44,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-18 20:12:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:12:44,620 INFO L225 Difference]: With dead ends: 314 [2020-08-18 20:12:44,620 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 20:12:44,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:12:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 20:12:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 142. [2020-08-18 20:12:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-08-18 20:12:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 167 transitions. [2020-08-18 20:12:44,717 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 167 transitions. Word has length 59 [2020-08-18 20:12:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:12:44,717 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 167 transitions. [2020-08-18 20:12:44,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 20:12:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 167 transitions. [2020-08-18 20:12:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-18 20:12:44,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:12:44,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:12:44,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:12:44,723 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:12:44,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:12:44,723 INFO L82 PathProgramCache]: Analyzing trace with hash -902835711, now seen corresponding path program 1 times [2020-08-18 20:12:44,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:12:44,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999622182] [2020-08-18 20:12:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:12:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,122 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:12:45,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:12:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:12:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:12:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:12:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:12:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:12:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 20:12:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 20:12:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 20:12:45,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999622182] [2020-08-18 20:12:45,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:12:45,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:12:45,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17532781] [2020-08-18 20:12:45,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:12:45,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:12:45,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:12:45,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:12:45,308 INFO L87 Difference]: Start difference. First operand 142 states and 167 transitions. Second operand 9 states. [2020-08-18 20:12:45,686 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:12:46,014 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:12:46,269 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:12:46,508 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:12:47,500 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:12:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:12:49,412 INFO L93 Difference]: Finished difference Result 481 states and 605 transitions. [2020-08-18 20:12:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 20:12:49,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-08-18 20:12:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:12:49,420 INFO L225 Difference]: With dead ends: 481 [2020-08-18 20:12:49,420 INFO L226 Difference]: Without dead ends: 367 [2020-08-18 20:12:49,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-08-18 20:12:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-08-18 20:12:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 313. [2020-08-18 20:12:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-08-18 20:12:49,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 384 transitions. [2020-08-18 20:12:49,501 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 384 transitions. Word has length 64 [2020-08-18 20:12:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:12:49,501 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 384 transitions. [2020-08-18 20:12:49,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:12:49,501 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 384 transitions. [2020-08-18 20:12:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 20:12:49,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:12:49,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:12:49,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:12:49,505 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:12:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:12:49,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2087202736, now seen corresponding path program 1 times [2020-08-18 20:12:49,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:12:49,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731035369] [2020-08-18 20:12:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:12:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,816 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:12:49,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:12:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:12:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:12:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:12:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:12:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:12:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:12:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 20:12:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 20:12:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 20:12:49,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731035369] [2020-08-18 20:12:49,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:12:49,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:12:49,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395433890] [2020-08-18 20:12:49,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:12:49,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:12:49,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:12:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:12:49,965 INFO L87 Difference]: Start difference. First operand 313 states and 384 transitions. Second operand 9 states. [2020-08-18 20:12:50,383 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:12:51,018 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:12:51,971 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:12:52,342 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:12:52,765 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:12:53,051 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:12:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:12:53,872 INFO L93 Difference]: Finished difference Result 829 states and 1126 transitions. [2020-08-18 20:12:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 20:12:53,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-08-18 20:12:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:12:53,881 INFO L225 Difference]: With dead ends: 829 [2020-08-18 20:12:53,881 INFO L226 Difference]: Without dead ends: 544 [2020-08-18 20:12:53,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 20:12:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-08-18 20:12:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 454. [2020-08-18 20:12:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-08-18 20:12:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 573 transitions. [2020-08-18 20:12:53,997 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 573 transitions. Word has length 70 [2020-08-18 20:12:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:12:53,997 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 573 transitions. [2020-08-18 20:12:53,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:12:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 573 transitions. [2020-08-18 20:12:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 20:12:54,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:12:54,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:12:54,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:12:54,002 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:12:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:12:54,002 INFO L82 PathProgramCache]: Analyzing trace with hash 571882893, now seen corresponding path program 1 times [2020-08-18 20:12:54,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:12:54,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369432767] [2020-08-18 20:12:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:12:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,374 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:12:54,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:12:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:12:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:12:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:12:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:12:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:12:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:12:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:12:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:12:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:12:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:12:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 20:12:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 20:12:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 20:12:54,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369432767] [2020-08-18 20:12:54,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:12:54,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:12:54,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929373091] [2020-08-18 20:12:54,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:12:54,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:12:54,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:12:54,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:12:54,463 INFO L87 Difference]: Start difference. First operand 454 states and 573 transitions. Second operand 6 states. [2020-08-18 20:12:54,960 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:12:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:12:56,117 INFO L93 Difference]: Finished difference Result 810 states and 1016 transitions. [2020-08-18 20:12:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:12:56,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-08-18 20:12:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:12:56,122 INFO L225 Difference]: With dead ends: 810 [2020-08-18 20:12:56,122 INFO L226 Difference]: Without dead ends: 485 [2020-08-18 20:12:56,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:12:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-08-18 20:12:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 412. [2020-08-18 20:12:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-08-18 20:12:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 497 transitions. [2020-08-18 20:12:56,206 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 497 transitions. Word has length 88 [2020-08-18 20:12:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:12:56,207 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 497 transitions. [2020-08-18 20:12:56,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:12:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 497 transitions. [2020-08-18 20:12:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 20:12:56,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:12:56,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:12:56,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:12:56,210 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:12:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:12:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1962075473, now seen corresponding path program 1 times [2020-08-18 20:12:56,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:12:56,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720064510] [2020-08-18 20:12:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:12:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,478 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:12:56,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:12:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:12:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:12:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:12:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:12:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:12:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:12:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 20:12:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:12:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:12:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:12:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:12:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 20:12:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 20:12:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:12:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 20:12:56,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720064510] [2020-08-18 20:12:56,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:12:56,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:12:56,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465373874] [2020-08-18 20:12:56,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:12:56,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:12:56,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:12:56,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:12:56,627 INFO L87 Difference]: Start difference. First operand 412 states and 497 transitions. Second operand 9 states. [2020-08-18 20:12:57,007 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:12:58,056 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:12:58,290 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:12:58,558 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:12:58,816 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:12:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:12:59,828 INFO L93 Difference]: Finished difference Result 1234 states and 1655 transitions. [2020-08-18 20:12:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 20:12:59,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 92 [2020-08-18 20:12:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:12:59,836 INFO L225 Difference]: With dead ends: 1234 [2020-08-18 20:12:59,838 INFO L226 Difference]: Without dead ends: 850 [2020-08-18 20:12:59,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-18 20:12:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-08-18 20:12:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 727. [2020-08-18 20:12:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2020-08-18 20:12:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 881 transitions. [2020-08-18 20:12:59,999 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 881 transitions. Word has length 92 [2020-08-18 20:13:00,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:13:00,001 INFO L479 AbstractCegarLoop]: Abstraction has 727 states and 881 transitions. [2020-08-18 20:13:00,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:13:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 881 transitions. [2020-08-18 20:13:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 20:13:00,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:13:00,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:13:00,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:13:00,008 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:13:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:13:00,008 INFO L82 PathProgramCache]: Analyzing trace with hash 236594576, now seen corresponding path program 1 times [2020-08-18 20:13:00,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:13:00,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140978374] [2020-08-18 20:13:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:13:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,278 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:13:00,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:13:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:13:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:13:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:13:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:13:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 20:13:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:13:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 20:13:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 20:13:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 20:13:00,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140978374] [2020-08-18 20:13:00,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:13:00,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:13:00,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138397509] [2020-08-18 20:13:00,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:13:00,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:13:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:13:00,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:13:00,428 INFO L87 Difference]: Start difference. First operand 727 states and 881 transitions. Second operand 9 states. [2020-08-18 20:13:01,553 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:01,819 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-18 20:13:02,050 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:02,292 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:13:02,993 INFO L93 Difference]: Finished difference Result 1548 states and 1977 transitions. [2020-08-18 20:13:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:13:02,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 92 [2020-08-18 20:13:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:13:03,001 INFO L225 Difference]: With dead ends: 1548 [2020-08-18 20:13:03,002 INFO L226 Difference]: Without dead ends: 849 [2020-08-18 20:13:03,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:13:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2020-08-18 20:13:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 747. [2020-08-18 20:13:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-08-18 20:13:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 901 transitions. [2020-08-18 20:13:03,161 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 901 transitions. Word has length 92 [2020-08-18 20:13:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:13:03,162 INFO L479 AbstractCegarLoop]: Abstraction has 747 states and 901 transitions. [2020-08-18 20:13:03,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:13:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 901 transitions. [2020-08-18 20:13:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 20:13:03,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:13:03,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:13:03,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:13:03,168 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:13:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:13:03,168 INFO L82 PathProgramCache]: Analyzing trace with hash 938194450, now seen corresponding path program 1 times [2020-08-18 20:13:03,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:13:03,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242935930] [2020-08-18 20:13:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:13:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,444 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:13:03,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:13:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:13:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:13:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:13:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:13:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 20:13:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:13:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 20:13:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 20:13:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 20:13:03,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242935930] [2020-08-18 20:13:03,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:13:03,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 20:13:03,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292105560] [2020-08-18 20:13:03,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 20:13:03,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:13:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 20:13:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:13:03,605 INFO L87 Difference]: Start difference. First operand 747 states and 901 transitions. Second operand 11 states. [2020-08-18 20:13:04,066 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:04,303 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:04,534 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:05,329 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:05,590 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:05,819 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:13:06,695 INFO L93 Difference]: Finished difference Result 1410 states and 1790 transitions. [2020-08-18 20:13:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:13:06,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 92 [2020-08-18 20:13:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:13:06,702 INFO L225 Difference]: With dead ends: 1410 [2020-08-18 20:13:06,702 INFO L226 Difference]: Without dead ends: 691 [2020-08-18 20:13:06,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 20:13:06,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-08-18 20:13:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 618. [2020-08-18 20:13:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-08-18 20:13:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 727 transitions. [2020-08-18 20:13:06,810 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 727 transitions. Word has length 92 [2020-08-18 20:13:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:13:06,810 INFO L479 AbstractCegarLoop]: Abstraction has 618 states and 727 transitions. [2020-08-18 20:13:06,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 20:13:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 727 transitions. [2020-08-18 20:13:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-18 20:13:06,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:13:06,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:13:06,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:13:06,815 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:13:06,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:13:06,815 INFO L82 PathProgramCache]: Analyzing trace with hash -711915603, now seen corresponding path program 1 times [2020-08-18 20:13:06,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:13:06,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687089473] [2020-08-18 20:13:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:13:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,203 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:13:07,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:13:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:13:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:13:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:13:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:13:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 20:13:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 20:13:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:13:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 20:13:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 20:13:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 20:13:07,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687089473] [2020-08-18 20:13:07,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:13:07,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 20:13:07,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119213311] [2020-08-18 20:13:07,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 20:13:07,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:13:07,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 20:13:07,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:13:07,368 INFO L87 Difference]: Start difference. First operand 618 states and 727 transitions. Second operand 12 states. [2020-08-18 20:13:07,765 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:08,408 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:09,100 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:09,439 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:09,681 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:09,964 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:10,228 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:11,999 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:12,293 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:13:12,737 INFO L93 Difference]: Finished difference Result 1813 states and 2317 transitions. [2020-08-18 20:13:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 20:13:12,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2020-08-18 20:13:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:13:12,747 INFO L225 Difference]: With dead ends: 1813 [2020-08-18 20:13:12,747 INFO L226 Difference]: Without dead ends: 1405 [2020-08-18 20:13:12,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 20:13:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2020-08-18 20:13:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1271. [2020-08-18 20:13:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-08-18 20:13:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1497 transitions. [2020-08-18 20:13:12,924 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1497 transitions. Word has length 96 [2020-08-18 20:13:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:13:12,924 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1497 transitions. [2020-08-18 20:13:12,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 20:13:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1497 transitions. [2020-08-18 20:13:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-18 20:13:12,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:13:12,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-08-18 20:13:12,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:13:12,929 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:13:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:13:12,929 INFO L82 PathProgramCache]: Analyzing trace with hash 69794205, now seen corresponding path program 1 times [2020-08-18 20:13:12,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:13:12,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276651692] [2020-08-18 20:13:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:13:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,225 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:13:13,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:13:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:13:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:13:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:13:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:13:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 20:13:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:13:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:13:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:13:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 20:13:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 20:13:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 20:13:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:13:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2020-08-18 20:13:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 20:13:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 20:13:13,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276651692] [2020-08-18 20:13:13,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:13:13,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 20:13:13,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823584519] [2020-08-18 20:13:13,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 20:13:13,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:13:13,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 20:13:13,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-08-18 20:13:13,564 INFO L87 Difference]: Start difference. First operand 1271 states and 1497 transitions. Second operand 16 states. [2020-08-18 20:13:14,191 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:14,520 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 20:13:14,786 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-08-18 20:13:15,048 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-08-18 20:13:15,697 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:16,013 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:16,386 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-18 20:13:16,677 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-18 20:13:17,706 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:18,338 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:18,640 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:18,981 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:19,531 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:19,915 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:20,297 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-18 20:13:20,978 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:21,268 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-18 20:13:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:13:22,066 INFO L93 Difference]: Finished difference Result 2793 states and 3416 transitions. [2020-08-18 20:13:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-18 20:13:22,067 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 155 [2020-08-18 20:13:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:13:22,076 INFO L225 Difference]: With dead ends: 2793 [2020-08-18 20:13:22,077 INFO L226 Difference]: Without dead ends: 1726 [2020-08-18 20:13:22,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=605, Invalid=2257, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 20:13:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2020-08-18 20:13:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1529. [2020-08-18 20:13:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1529 states. [2020-08-18 20:13:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1785 transitions. [2020-08-18 20:13:22,366 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1785 transitions. Word has length 155 [2020-08-18 20:13:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:13:22,367 INFO L479 AbstractCegarLoop]: Abstraction has 1529 states and 1785 transitions. [2020-08-18 20:13:22,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 20:13:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1785 transitions. [2020-08-18 20:13:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-08-18 20:13:22,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:13:22,382 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-08-18 20:13:22,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:13:22,383 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:13:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:13:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1402201584, now seen corresponding path program 1 times [2020-08-18 20:13:22,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:13:22,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788881955] [2020-08-18 20:13:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:13:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,695 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:13:22,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:13:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:13:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:13:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:13:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:13:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 20:13:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:13:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:13:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:13:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 20:13:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 20:13:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:13:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:22,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:13:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 20:13:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 20:13:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:13:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 20:13:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-08-18 20:13:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-08-18 20:13:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:13:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-08-18 20:13:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-18 20:13:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 76 proven. 31 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 20:13:23,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788881955] [2020-08-18 20:13:23,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:13:23,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 20:13:23,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226412364] [2020-08-18 20:13:23,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 20:13:23,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:13:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 20:13:23,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-18 20:13:23,263 INFO L87 Difference]: Start difference. First operand 1529 states and 1785 transitions. Second operand 15 states. [2020-08-18 20:13:24,642 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:24,881 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:13:25,149 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:25,396 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:25,631 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:26,476 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:27,032 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 192 [2020-08-18 20:13:27,490 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 192 [2020-08-18 20:13:27,867 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:13:30,032 INFO L93 Difference]: Finished difference Result 4301 states and 5229 transitions. [2020-08-18 20:13:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 20:13:30,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 269 [2020-08-18 20:13:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:13:30,049 INFO L225 Difference]: With dead ends: 4301 [2020-08-18 20:13:30,050 INFO L226 Difference]: Without dead ends: 2605 [2020-08-18 20:13:30,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 20:13:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2020-08-18 20:13:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2205. [2020-08-18 20:13:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2205 states. [2020-08-18 20:13:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 2585 transitions. [2020-08-18 20:13:30,462 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 2585 transitions. Word has length 269 [2020-08-18 20:13:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:13:30,463 INFO L479 AbstractCegarLoop]: Abstraction has 2205 states and 2585 transitions. [2020-08-18 20:13:30,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 20:13:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 2585 transitions. [2020-08-18 20:13:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-08-18 20:13:30,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:13:30,473 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-08-18 20:13:30,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:13:30,473 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:13:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:13:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash -692797707, now seen corresponding path program 1 times [2020-08-18 20:13:30,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:13:30,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737571080] [2020-08-18 20:13:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:13:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,771 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:13:30,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:13:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:13:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:13:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 20:13:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:13:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 20:13:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 20:13:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:13:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:13:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 20:13:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 20:13:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:13:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:30,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:13:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 20:13:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-18 20:13:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:13:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 20:13:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:13:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 20:13:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-08-18 20:13:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:13:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-18 20:13:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:13:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:13:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:13:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-18 20:13:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-18 20:13:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:13:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 85 proven. 36 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-08-18 20:13:31,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737571080] [2020-08-18 20:13:31,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:13:31,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 20:13:31,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866547135] [2020-08-18 20:13:31,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 20:13:31,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:13:31,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 20:13:31,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-08-18 20:13:31,266 INFO L87 Difference]: Start difference. First operand 2205 states and 2585 transitions. Second operand 16 states. [2020-08-18 20:13:31,765 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:32,098 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-18 20:13:32,347 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:32,584 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-18 20:13:33,237 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:34,299 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:13:34,615 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:34,870 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:35,439 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:36,327 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:36,580 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 20:13:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:13:37,447 INFO L93 Difference]: Finished difference Result 4208 states and 4993 transitions. [2020-08-18 20:13:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 20:13:37,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 275 [2020-08-18 20:13:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:13:37,459 INFO L225 Difference]: With dead ends: 4208 [2020-08-18 20:13:37,460 INFO L226 Difference]: Without dead ends: 2229 [2020-08-18 20:13:37,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 20:13:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2020-08-18 20:13:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 2158. [2020-08-18 20:13:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2158 states. [2020-08-18 20:13:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 2494 transitions. [2020-08-18 20:13:37,825 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 2494 transitions. Word has length 275 [2020-08-18 20:13:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:13:37,829 INFO L479 AbstractCegarLoop]: Abstraction has 2158 states and 2494 transitions. [2020-08-18 20:13:37,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 20:13:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 2494 transitions. [2020-08-18 20:13:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-08-18 20:13:37,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:13:37,841 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-08-18 20:13:37,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:13:37,842 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:13:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:13:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash 841992575, now seen corresponding path program 1 times [2020-08-18 20:13:37,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:13:37,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528760436] [2020-08-18 20:13:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:13:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat