/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=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product39.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:40:42,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:40:42,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:40:42,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:40:42,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:40:42,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:40:42,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:40:42,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:40:42,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:40:42,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:40:42,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:40:42,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:40:42,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:40:42,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:40:42,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:40:42,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:40:42,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:40:42,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:40:42,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:40:42,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:40:42,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:40:42,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:40:42,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:40:42,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:40:42,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:40:42,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:40:42,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:40:42,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:40:42,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:40:42,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:40:42,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:40:42,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:40:42,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:40:42,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:40:42,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:40:42,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:40:42,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:40:42,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:40:42,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:40:42,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:40:42,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:40:42,111 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 21:40:42,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:40:42,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:40:42,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:40:42,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:40:42,147 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:40:42,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:40:42,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:40:42,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:40:42,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:40:42,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:40:42,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:40:42,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:40:42,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:40:42,150 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:40:42,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:40:42,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:40:42,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:40:42,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:40:42,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:40:42,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:40:42,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:40:42,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:40:42,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:40:42,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:40:42,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:40:42,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:40:42,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:40:42,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:40:42,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:40:42,154 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=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:40:42,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:40:42,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:40:42,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:40:42,501 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:40:42,501 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:40:42,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product39.cil.c [2020-08-18 21:40:42,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9999ff34/691d0cb452ff46b4b4691e703e32248b/FLAG73108ee88 [2020-08-18 21:40:43,169 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:40:43,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product39.cil.c [2020-08-18 21:40:43,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9999ff34/691d0cb452ff46b4b4691e703e32248b/FLAG73108ee88 [2020-08-18 21:40:43,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9999ff34/691d0cb452ff46b4b4691e703e32248b [2020-08-18 21:40:43,459 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:40:43,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:40:43,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:40:43,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:40:43,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:40:43,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:40:43" (1/1) ... [2020-08-18 21:40:43,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6cae7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:43, skipping insertion in model container [2020-08-18 21:40:43,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:40:43" (1/1) ... [2020-08-18 21:40:43,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:40:43,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:40:43,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:40:43,930 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:40:44,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:40:44,131 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:40:44,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44 WrapperNode [2020-08-18 21:40:44,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:40:44,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:40:44,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:40:44,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:40:44,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:40:44,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:40:44,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:40:44,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:40:44,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:40:44,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:40:44,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:40:44,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 21:40:44,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 21:40:44,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 21:40:44,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 21:40:44,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 21:40:44,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 21:40:44,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 21:40:44,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 21:40:44,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 21:40:44,291 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 21:40:44,291 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 21:40:44,291 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 21:40:44,291 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 21:40:44,292 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 21:40:44,292 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 21:40:44,293 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 21:40:44,293 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 21:40:44,293 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 21:40:44,293 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 21:40:44,293 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 21:40:44,294 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 21:40:44,294 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 21:40:44,295 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 21:40:44,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 21:40:44,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 21:40:44,295 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 21:40:44,296 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 21:40:44,296 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 21:40:44,296 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 21:40:44,296 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 21:40:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 21:40:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 21:40:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 21:40:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 21:40:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 21:40:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 21:40:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:40:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:40:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:40:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 21:40:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 21:40:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:40:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:40:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 21:40:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:40:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 21:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 21:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 21:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 21:40:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 21:40:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:40:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 21:40:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 21:40:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 21:40:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 21:40:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 21:40:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 21:40:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 21:40:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 21:40:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 21:40:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 21:40:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 21:40:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 21:40:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 21:40:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 21:40:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 21:40:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 21:40:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 21:40:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 21:40:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 21:40:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 21:40:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 21:40:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:40:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:40:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 21:40:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:40:45,345 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:40:45,346 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 21:40:45,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:40:45 BoogieIcfgContainer [2020-08-18 21:40:45,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:40:45,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:40:45,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:40:45,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:40:45,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:40:43" (1/3) ... [2020-08-18 21:40:45,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b44703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:40:45, skipping insertion in model container [2020-08-18 21:40:45,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (2/3) ... [2020-08-18 21:40:45,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b44703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:40:45, skipping insertion in model container [2020-08-18 21:40:45,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:40:45" (3/3) ... [2020-08-18 21:40:45,359 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product39.cil.c [2020-08-18 21:40:45,370 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:40:45,378 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:40:45,393 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:40:45,419 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:40:45,420 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:40:45,420 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:40:45,420 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:40:45,420 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:40:45,421 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:40:45,421 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:40:45,421 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:40:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states. [2020-08-18 21:40:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 21:40:45,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:45,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:45,457 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1081228888, now seen corresponding path program 1 times [2020-08-18 21:40:45,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:45,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650549196] [2020-08-18 21:40:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,204 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:46,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:40:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 21:40:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:46,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650549196] [2020-08-18 21:40:46,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:46,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:40:46,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248867188] [2020-08-18 21:40:46,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:40:46,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:46,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:40:46,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:40:46,302 INFO L87 Difference]: Start difference. First operand 172 states. Second operand 3 states. [2020-08-18 21:40:47,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:47,459 INFO L93 Difference]: Finished difference Result 301 states and 397 transitions. [2020-08-18 21:40:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:40:47,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 21:40:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:47,476 INFO L225 Difference]: With dead ends: 301 [2020-08-18 21:40:47,476 INFO L226 Difference]: Without dead ends: 163 [2020-08-18 21:40:47,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:40:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-18 21:40:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 129. [2020-08-18 21:40:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-18 21:40:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2020-08-18 21:40:47,570 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 46 [2020-08-18 21:40:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:47,570 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2020-08-18 21:40:47,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:40:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2020-08-18 21:40:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 21:40:47,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:47,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:47,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:40:47,575 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:47,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1618039840, now seen corresponding path program 1 times [2020-08-18 21:40:47,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:47,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333800252] [2020-08-18 21:40:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:47,949 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:47,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:40:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:40:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:48,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333800252] [2020-08-18 21:40:48,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:48,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:40:48,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335611839] [2020-08-18 21:40:48,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:40:48,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:48,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:40:48,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:40:48,035 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand 4 states. [2020-08-18 21:40:48,429 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:40:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:49,301 INFO L93 Difference]: Finished difference Result 228 states and 280 transitions. [2020-08-18 21:40:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:40:49,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 21:40:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:49,305 INFO L225 Difference]: With dead ends: 228 [2020-08-18 21:40:49,305 INFO L226 Difference]: Without dead ends: 147 [2020-08-18 21:40:49,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:40:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-08-18 21:40:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-08-18 21:40:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 21:40:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2020-08-18 21:40:49,348 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 47 [2020-08-18 21:40:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:49,349 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2020-08-18 21:40:49,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:40:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2020-08-18 21:40:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 21:40:49,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:49,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:49,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:40:49,352 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:49,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1339561462, now seen corresponding path program 1 times [2020-08-18 21:40:49,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:49,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083137497] [2020-08-18 21:40:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:49,692 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:49,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:49,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:49,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:49,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:49,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:49,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:40:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:49,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:40:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:49,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083137497] [2020-08-18 21:40:49,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:49,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:40:49,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926383587] [2020-08-18 21:40:49,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:40:49,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:49,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:40:49,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:40:49,780 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand 8 states. [2020-08-18 21:40:50,167 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:40:50,514 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:50,756 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:51,014 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:51,746 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:40:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:53,444 INFO L93 Difference]: Finished difference Result 412 states and 515 transitions. [2020-08-18 21:40:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:40:53,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 21:40:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:53,450 INFO L225 Difference]: With dead ends: 412 [2020-08-18 21:40:53,450 INFO L226 Difference]: Without dead ends: 316 [2020-08-18 21:40:53,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:40:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-08-18 21:40:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 258. [2020-08-18 21:40:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-18 21:40:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 314 transitions. [2020-08-18 21:40:53,533 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 314 transitions. Word has length 51 [2020-08-18 21:40:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:53,534 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 314 transitions. [2020-08-18 21:40:53,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:40:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 314 transitions. [2020-08-18 21:40:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 21:40:53,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:53,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:53,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:40:53,538 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash 857479477, now seen corresponding path program 1 times [2020-08-18 21:40:53,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:53,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294612108] [2020-08-18 21:40:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,881 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:40:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:40:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 21:40:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:53,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294612108] [2020-08-18 21:40:53,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:53,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:40:53,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221276385] [2020-08-18 21:40:53,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:40:53,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:53,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:40:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:40:53,971 INFO L87 Difference]: Start difference. First operand 258 states and 314 transitions. Second operand 8 states. [2020-08-18 21:40:54,379 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:40:55,344 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:55,724 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:40:56,041 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:56,365 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:56,815 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:40:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:57,671 INFO L93 Difference]: Finished difference Result 832 states and 1087 transitions. [2020-08-18 21:40:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:40:57,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 21:40:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:57,678 INFO L225 Difference]: With dead ends: 832 [2020-08-18 21:40:57,679 INFO L226 Difference]: Without dead ends: 598 [2020-08-18 21:40:57,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:40:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-08-18 21:40:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 471. [2020-08-18 21:40:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-08-18 21:40:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 578 transitions. [2020-08-18 21:40:57,821 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 578 transitions. Word has length 57 [2020-08-18 21:40:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:57,821 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 578 transitions. [2020-08-18 21:40:57,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:40:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 578 transitions. [2020-08-18 21:40:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 21:40:57,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:57,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:57,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:40:57,825 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash -690329863, now seen corresponding path program 1 times [2020-08-18 21:40:57,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:57,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692075597] [2020-08-18 21:40:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,124 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:58,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:40:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:40:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 21:40:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 21:40:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:58,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692075597] [2020-08-18 21:40:58,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:58,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:40:58,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511141099] [2020-08-18 21:40:58,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:40:58,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:58,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:40:58,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:40:58,226 INFO L87 Difference]: Start difference. First operand 471 states and 578 transitions. Second operand 9 states. [2020-08-18 21:40:58,692 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:40:59,558 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:59,880 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:00,117 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:00,670 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:00,931 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:01,871 INFO L93 Difference]: Finished difference Result 1331 states and 1800 transitions. [2020-08-18 21:41:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:41:01,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 21:41:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:01,879 INFO L225 Difference]: With dead ends: 1331 [2020-08-18 21:41:01,880 INFO L226 Difference]: Without dead ends: 884 [2020-08-18 21:41:01,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:41:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2020-08-18 21:41:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 703. [2020-08-18 21:41:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-08-18 21:41:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 871 transitions. [2020-08-18 21:41:02,022 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 871 transitions. Word has length 61 [2020-08-18 21:41:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:02,022 INFO L479 AbstractCegarLoop]: Abstraction has 703 states and 871 transitions. [2020-08-18 21:41:02,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:41:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 871 transitions. [2020-08-18 21:41:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 21:41:02,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:02,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:02,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:41:02,026 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1573489665, now seen corresponding path program 1 times [2020-08-18 21:41:02,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:02,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022201576] [2020-08-18 21:41:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,288 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:02,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:41:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 21:41:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 21:41:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:02,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022201576] [2020-08-18 21:41:02,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:02,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:41:02,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758977290] [2020-08-18 21:41:02,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:41:02,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:02,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:41:02,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:41:02,407 INFO L87 Difference]: Start difference. First operand 703 states and 871 transitions. Second operand 9 states. [2020-08-18 21:41:02,871 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:03,869 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:04,113 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:04,396 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:04,658 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:06,464 INFO L93 Difference]: Finished difference Result 2338 states and 3323 transitions. [2020-08-18 21:41:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:41:06,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-18 21:41:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:06,477 INFO L225 Difference]: With dead ends: 2338 [2020-08-18 21:41:06,477 INFO L226 Difference]: Without dead ends: 1659 [2020-08-18 21:41:06,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 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 21:41:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2020-08-18 21:41:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1259. [2020-08-18 21:41:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1259 states. [2020-08-18 21:41:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1546 transitions. [2020-08-18 21:41:06,708 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1546 transitions. Word has length 83 [2020-08-18 21:41:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:06,708 INFO L479 AbstractCegarLoop]: Abstraction has 1259 states and 1546 transitions. [2020-08-18 21:41:06,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:41:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1546 transitions. [2020-08-18 21:41:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 21:41:06,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:06,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:06,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:41:06,713 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:06,713 INFO L82 PathProgramCache]: Analyzing trace with hash 547997666, now seen corresponding path program 1 times [2020-08-18 21:41:06,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:06,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605145347] [2020-08-18 21:41:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:06,990 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:06,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:41:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 21:41:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 21:41:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:07,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605145347] [2020-08-18 21:41:07,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:07,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:41:07,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381580152] [2020-08-18 21:41:07,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:41:07,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:07,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:41:07,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:41:07,116 INFO L87 Difference]: Start difference. First operand 1259 states and 1546 transitions. Second operand 9 states. [2020-08-18 21:41:08,165 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:08,409 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:08,687 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:08,950 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:10,064 INFO L93 Difference]: Finished difference Result 2894 states and 3849 transitions. [2020-08-18 21:41:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:41:10,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-18 21:41:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:10,081 INFO L225 Difference]: With dead ends: 2894 [2020-08-18 21:41:10,081 INFO L226 Difference]: Without dead ends: 1659 [2020-08-18 21:41:10,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:41:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2020-08-18 21:41:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1299. [2020-08-18 21:41:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1299 states. [2020-08-18 21:41:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1586 transitions. [2020-08-18 21:41:10,335 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1586 transitions. Word has length 83 [2020-08-18 21:41:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:10,336 INFO L479 AbstractCegarLoop]: Abstraction has 1299 states and 1586 transitions. [2020-08-18 21:41:10,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:41:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1586 transitions. [2020-08-18 21:41:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 21:41:10,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:10,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:10,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:41:10,340 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash 570629920, now seen corresponding path program 1 times [2020-08-18 21:41:10,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:10,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526669351] [2020-08-18 21:41:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,607 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:10,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:41:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 21:41:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 21:41:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:10,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526669351] [2020-08-18 21:41:10,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:10,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 21:41:10,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343695980] [2020-08-18 21:41:10,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:41:10,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:41:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:41:10,750 INFO L87 Difference]: Start difference. First operand 1299 states and 1586 transitions. Second operand 11 states. [2020-08-18 21:41:11,474 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:11,737 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:11,956 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:12,634 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:12,889 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:13,114 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:14,224 INFO L93 Difference]: Finished difference Result 2592 states and 3413 transitions. [2020-08-18 21:41:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:41:14,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-18 21:41:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:14,233 INFO L225 Difference]: With dead ends: 2592 [2020-08-18 21:41:14,234 INFO L226 Difference]: Without dead ends: 1317 [2020-08-18 21:41:14,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 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 21:41:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2020-08-18 21:41:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1073. [2020-08-18 21:41:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2020-08-18 21:41:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1282 transitions. [2020-08-18 21:41:14,423 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1282 transitions. Word has length 83 [2020-08-18 21:41:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:14,424 INFO L479 AbstractCegarLoop]: Abstraction has 1073 states and 1282 transitions. [2020-08-18 21:41:14,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:41:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1282 transitions. [2020-08-18 21:41:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 21:41:14,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:14,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:14,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:41:14,427 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1146127589, now seen corresponding path program 1 times [2020-08-18 21:41:14,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:14,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198894368] [2020-08-18 21:41:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:41:14,490 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:41:14,490 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:41:14,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:41:14,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:41:14 BoogieIcfgContainer [2020-08-18 21:41:14,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:41:14,519 INFO L168 Benchmark]: Toolchain (without parser) took 31058.79 ms. Allocated memory was 137.9 MB in the beginning and 723.5 MB in the end (delta: 585.6 MB). Free memory was 100.5 MB in the beginning and 384.0 MB in the end (delta: -283.5 MB). Peak memory consumption was 302.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:14,520 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:41:14,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.52 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 100.1 MB in the beginning and 170.4 MB in the end (delta: -70.4 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:14,522 INFO L168 Benchmark]: Boogie Preprocessor took 91.94 ms. Allocated memory is still 200.8 MB. Free memory was 170.4 MB in the beginning and 166.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:14,522 INFO L168 Benchmark]: RCFGBuilder took 1125.87 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 166.2 MB in the beginning and 197.1 MB in the end (delta: -30.9 MB). Peak memory consumption was 88.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:14,523 INFO L168 Benchmark]: TraceAbstraction took 29165.58 ms. Allocated memory was 230.7 MB in the beginning and 723.5 MB in the end (delta: 492.8 MB). Free memory was 195.6 MB in the beginning and 384.0 MB in the end (delta: -188.4 MB). Peak memory consumption was 304.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:14,526 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 670.52 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 100.1 MB in the beginning and 170.4 MB in the end (delta: -70.4 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.94 ms. Allocated memory is still 200.8 MB. Free memory was 170.4 MB in the beginning and 166.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1125.87 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 166.2 MB in the beginning and 197.1 MB in the end (delta: -30.9 MB). Peak memory consumption was 88.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29165.58 ms. Allocated memory was 230.7 MB in the beginning and 723.5 MB in the end (delta: 492.8 MB). Free memory was 195.6 MB in the beginning and 384.0 MB in the end (delta: -188.4 MB). Peak memory consumption was 304.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 439]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L450] int waterLevel = 1; [L451] int methaneLevelCritical = 0; [L617] int pumpRunning = 0; [L618] int systemActive = 1; [L848] int cleanupTimeShifts = 4; [L921] int retValue_acc ; [L922] int tmp ; [L926] FCALL select_helpers() [L927] FCALL select_features() [L928] CALL, EXPR valid_product() [L839] int retValue_acc ; [L842] retValue_acc = 1 [L843] return (retValue_acc); [L928] RET, EXPR valid_product() [L928] tmp = valid_product() [L930] COND TRUE \read(tmp) [L932] FCALL setup() [L933] CALL runTest() [L915] CALL test() [L548] int splverifierCounter ; [L549] int tmp ; [L550] int tmp___0 ; [L551] int tmp___1 ; [L552] int tmp___2 ; [L555] splverifierCounter = 0 [L557] COND TRUE 1 [L559] COND TRUE splverifierCounter < 4 [L565] tmp = __VERIFIER_nondet_int() [L567] COND TRUE \read(tmp) [L569] CALL waterRise() [L468] COND TRUE waterLevel < 2 [L469] waterLevel = waterLevel + 1 [L569] RET waterRise() [L575] tmp___0 = __VERIFIER_nondet_int() [L577] COND TRUE \read(tmp___0) [L579] CALL changeMethaneLevel() [L480] COND FALSE !(\read(methaneLevelCritical)) [L483] methaneLevelCritical = 1 [L579] RET changeMethaneLevel() [L585] tmp___2 = __VERIFIER_nondet_int() [L587] COND TRUE \read(tmp___2) [L602] CALL timeShift() [L624] COND FALSE !(\read(pumpRunning)) [L631] COND TRUE \read(systemActive) [L633] CALL processEnvironment() [L679] int tmp ; [L682] COND FALSE !(\read(pumpRunning)) [L697] CALL processEnvironment__wrappee__highWaterSensor() [L653] int tmp ; [L656] COND TRUE ! pumpRunning [L658] CALL, EXPR isHighWaterLevel() [L776] int retValue_acc ; [L777] int tmp ; [L778] int tmp___0 ; [L782] CALL, EXPR isHighWaterSensorDry() [L530] int retValue_acc ; [L533] COND FALSE !(waterLevel < 2) [L537] retValue_acc = 0 [L538] return (retValue_acc); [L782] RET, EXPR isHighWaterSensorDry() [L782] tmp = isHighWaterSensorDry() [L784] COND FALSE !(\read(tmp)) [L787] tmp___0 = 1 [L789] retValue_acc = tmp___0 [L790] return (retValue_acc); [L658] RET, EXPR isHighWaterLevel() [L658] tmp = isHighWaterLevel() [L660] COND TRUE \read(tmp) [L662] CALL activatePump() [L707] pumpRunning = 1 [L662] RET activatePump() [L697] RET processEnvironment__wrappee__highWaterSensor() [L633] RET processEnvironment() [L639] CALL __utac_acc__Specification1_spec__1() [L410] int tmp ; [L411] int tmp___0 ; [L415] CALL, EXPR isMethaneLevelCritical() [L489] int retValue_acc ; [L492] retValue_acc = methaneLevelCritical [L493] return (retValue_acc); [L415] RET, EXPR isMethaneLevelCritical() [L415] tmp = isMethaneLevelCritical() [L417] COND TRUE \read(tmp) [L419] CALL, EXPR isPumpRunning() [L731] int retValue_acc ; [L734] retValue_acc = pumpRunning [L735] return (retValue_acc); [L419] RET, EXPR isPumpRunning() [L419] tmp___0 = isPumpRunning() [L421] COND TRUE \read(tmp___0) [L423] CALL __automaton_fail() [L439] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 231 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.0s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 909 SDtfs, 1603 SDslu, 1183 SDs, 0 SdLazy, 5323 SolverSat, 1014 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1299occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1431 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 147464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...