/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec5_product57.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:14:57,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:14:57,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:14:57,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:14:57,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:14:57,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:14:57,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:14:57,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:14:57,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:14:57,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:14:57,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:14:57,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:14:57,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:14:57,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:14:57,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:14:57,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:14:57,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:14:57,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:14:57,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:14:57,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:14:57,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:14:57,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:14:57,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:14:57,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:14:57,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:14:57,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:14:57,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:14:57,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:14:57,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:14:57,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:14:57,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:14:57,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:14:57,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:14:57,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:14:57,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:14:57,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:14:57,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:14:57,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:14:57,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:14:57,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:14:57,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:14:57,682 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 [2020-09-21 10:14:57,730 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:14:57,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:14:57,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:14:57,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:14:57,732 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:14:57,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:14:57,733 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:14:57,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:14:57,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:14:57,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:14:57,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:14:57,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:14:57,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:14:57,734 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:14:57,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:14:57,735 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:14:57,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:14:57,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:14:57,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:14:57,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:14:57,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:14:57,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:14:57,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:14:57,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:14:57,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:14:57,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:14:57,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:14:57,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:14:57,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:14:57,738 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 -> false [2020-09-21 10:14:58,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:14:58,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:14:58,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:14:58,285 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:14:58,286 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:14:58,287 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product57.cil.c [2020-09-21 10:14:58,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1e51770b/4120cedf2003401f995a26873631b161/FLAGb43de5bae [2020-09-21 10:14:58,985 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:14:58,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec5_product57.cil.c [2020-09-21 10:14:59,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1e51770b/4120cedf2003401f995a26873631b161/FLAGb43de5bae [2020-09-21 10:14:59,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1e51770b/4120cedf2003401f995a26873631b161 [2020-09-21 10:14:59,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:14:59,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:14:59,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:14:59,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:14:59,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:14:59,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:14:59" (1/1) ... [2020-09-21 10:14:59,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be095dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:59, skipping insertion in model container [2020-09-21 10:14:59,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:14:59" (1/1) ... [2020-09-21 10:14:59,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:14:59,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:14:59,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:14:59,874 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:14:59,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:15:00,035 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:15:00,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00 WrapperNode [2020-09-21 10:15:00,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:15:00,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:15:00,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:15:00,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:15:00,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (1/1) ... [2020-09-21 10:15:00,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (1/1) ... [2020-09-21 10:15:00,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (1/1) ... [2020-09-21 10:15:00,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (1/1) ... [2020-09-21 10:15:00,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (1/1) ... [2020-09-21 10:15:00,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (1/1) ... [2020-09-21 10:15:00,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (1/1) ... [2020-09-21 10:15:00,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:15:00,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:15:00,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:15:00,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:15:00,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (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 [2020-09-21 10:15:00,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:15:00,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:15:00,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-21 10:15:00,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-21 10:15:00,237 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-21 10:15:00,237 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-21 10:15:00,238 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-21 10:15:00,238 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-21 10:15:00,238 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-21 10:15:00,239 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-21 10:15:00,239 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-21 10:15:00,240 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-21 10:15:00,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:15:00,241 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-21 10:15:00,241 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-21 10:15:00,242 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-21 10:15:00,242 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-21 10:15:00,242 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-21 10:15:00,243 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-21 10:15:00,243 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-21 10:15:00,243 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-09-21 10:15:00,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-21 10:15:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-21 10:15:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-21 10:15:00,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-21 10:15:00,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-21 10:15:00,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-21 10:15:00,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2020-09-21 10:15:00,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2020-09-21 10:15:00,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2020-09-21 10:15:00,246 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-21 10:15:00,246 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-21 10:15:00,246 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-21 10:15:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:15:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-21 10:15:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-09-21 10:15:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-21 10:15:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-21 10:15:00,247 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-21 10:15:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-21 10:15:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-21 10:15:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-21 10:15:00,248 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-09-21 10:15:00,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:15:00,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:15:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:15:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-21 10:15:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-21 10:15:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-21 10:15:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-21 10:15:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-21 10:15:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-21 10:15:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-21 10:15:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-21 10:15:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-21 10:15:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-21 10:15:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-21 10:15:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-21 10:15:00,253 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2020-09-21 10:15:00,253 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-21 10:15:00,253 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-21 10:15:00,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:15:00,254 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-21 10:15:00,254 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-21 10:15:00,254 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-21 10:15:00,254 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-21 10:15:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-21 10:15:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-09-21 10:15:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:15:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-21 10:15:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:15:00,255 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:15:00,256 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-21 10:15:00,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:15:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:15:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:15:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:15:00,258 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-21 10:15:00,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:15:00,258 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-21 10:15:00,259 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-21 10:15:00,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:15:00,259 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-21 10:15:00,259 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-21 10:15:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-21 10:15:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-21 10:15:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2020-09-21 10:15:00,261 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2020-09-21 10:15:00,261 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-21 10:15:00,261 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-21 10:15:00,261 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-21 10:15:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-21 10:15:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-21 10:15:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:15:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-09-21 10:15:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-09-21 10:15:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-21 10:15:00,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:15:00,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:15:00,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:15:01,475 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:15:01,476 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 10:15:01,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:15:01 BoogieIcfgContainer [2020-09-21 10:15:01,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:15:01,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:15:01,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:15:01,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:15:01,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:14:59" (1/3) ... [2020-09-21 10:15:01,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd4f15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:15:01, skipping insertion in model container [2020-09-21 10:15:01,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:15:00" (2/3) ... [2020-09-21 10:15:01,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd4f15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:15:01, skipping insertion in model container [2020-09-21 10:15:01,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:15:01" (3/3) ... [2020-09-21 10:15:01,497 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product57.cil.c [2020-09-21 10:15:01,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:15:01,521 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:15:01,540 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:15:01,569 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:15:01,569 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:15:01,570 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:15:01,570 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:15:01,570 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:15:01,570 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:15:01,570 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:15:01,570 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:15:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2020-09-21 10:15:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 10:15:01,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:01,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:01,612 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash 479094946, now seen corresponding path program 1 times [2020-09-21 10:15:01,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:01,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513187793] [2020-09-21 10:15:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,352 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:02,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:15:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 10:15:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:02,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513187793] [2020-09-21 10:15:02,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:02,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:15:02,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683479727] [2020-09-21 10:15:02,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:15:02,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:15:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:15:02,573 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 4 states. [2020-09-21 10:15:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:03,778 INFO L93 Difference]: Finished difference Result 335 states and 423 transitions. [2020-09-21 10:15:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:15:03,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-09-21 10:15:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:03,801 INFO L225 Difference]: With dead ends: 335 [2020-09-21 10:15:03,801 INFO L226 Difference]: Without dead ends: 183 [2020-09-21 10:15:03,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:15:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-21 10:15:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2020-09-21 10:15:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-21 10:15:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 178 transitions. [2020-09-21 10:15:03,934 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 178 transitions. Word has length 59 [2020-09-21 10:15:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:03,936 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 178 transitions. [2020-09-21 10:15:03,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:15:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 178 transitions. [2020-09-21 10:15:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-21 10:15:03,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:03,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:03,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:15:03,950 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1126861649, now seen corresponding path program 1 times [2020-09-21 10:15:03,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:03,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693650892] [2020-09-21 10:15:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,449 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:04,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:15:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:15:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:04,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693650892] [2020-09-21 10:15:04,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:04,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:15:04,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9907739] [2020-09-21 10:15:04,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:15:04,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:15:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:15:04,690 INFO L87 Difference]: Start difference. First operand 153 states and 178 transitions. Second operand 9 states. [2020-09-21 10:15:05,123 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:05,495 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:05,827 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:06,136 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:07,790 INFO L93 Difference]: Finished difference Result 308 states and 378 transitions. [2020-09-21 10:15:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:15:07,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-09-21 10:15:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:07,797 INFO L225 Difference]: With dead ends: 308 [2020-09-21 10:15:07,797 INFO L226 Difference]: Without dead ends: 183 [2020-09-21 10:15:07,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:15:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-21 10:15:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2020-09-21 10:15:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-21 10:15:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2020-09-21 10:15:07,877 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 64 [2020-09-21 10:15:07,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:07,878 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2020-09-21 10:15:07,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:15:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2020-09-21 10:15:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-21 10:15:07,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:07,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:07,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:15:07,882 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1745445590, now seen corresponding path program 1 times [2020-09-21 10:15:07,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:07,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968046878] [2020-09-21 10:15:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,322 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:08,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:15:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-21 10:15:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-21 10:15:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:08,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968046878] [2020-09-21 10:15:08,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:08,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:15:08,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122355114] [2020-09-21 10:15:08,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:15:08,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:08,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:15:08,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:15:08,495 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand 7 states. [2020-09-21 10:15:08,972 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:10,866 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:11,920 INFO L93 Difference]: Finished difference Result 445 states and 574 transitions. [2020-09-21 10:15:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:15:11,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-09-21 10:15:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:11,930 INFO L225 Difference]: With dead ends: 445 [2020-09-21 10:15:11,930 INFO L226 Difference]: Without dead ends: 320 [2020-09-21 10:15:11,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:15:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-09-21 10:15:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 259. [2020-09-21 10:15:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-09-21 10:15:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 309 transitions. [2020-09-21 10:15:12,001 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 309 transitions. Word has length 77 [2020-09-21 10:15:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:12,001 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 309 transitions. [2020-09-21 10:15:12,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:15:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 309 transitions. [2020-09-21 10:15:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 10:15:12,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:12,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:12,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:15:12,004 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:12,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1775922839, now seen corresponding path program 1 times [2020-09-21 10:15:12,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:12,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532112162] [2020-09-21 10:15:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,415 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:12,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:15:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-21 10:15:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-21 10:15:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:15:12,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532112162] [2020-09-21 10:15:12,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:12,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:15:12,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366822339] [2020-09-21 10:15:12,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:15:12,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:15:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:15:12,596 INFO L87 Difference]: Start difference. First operand 259 states and 309 transitions. Second operand 9 states. [2020-09-21 10:15:13,124 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:13,908 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:15,043 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:15,427 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:15,938 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:16,246 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:17,140 INFO L93 Difference]: Finished difference Result 540 states and 684 transitions. [2020-09-21 10:15:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:15:17,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-09-21 10:15:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:17,145 INFO L225 Difference]: With dead ends: 540 [2020-09-21 10:15:17,145 INFO L226 Difference]: Without dead ends: 309 [2020-09-21 10:15:17,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:15:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-09-21 10:15:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2020-09-21 10:15:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-21 10:15:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 306 transitions. [2020-09-21 10:15:17,195 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 306 transitions. Word has length 91 [2020-09-21 10:15:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:17,196 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 306 transitions. [2020-09-21 10:15:17,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:15:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 306 transitions. [2020-09-21 10:15:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-21 10:15:17,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:17,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:17,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:15:17,199 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 534241489, now seen corresponding path program 1 times [2020-09-21 10:15:17,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:17,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069611061] [2020-09-21 10:15:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,517 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:17,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:15:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:15:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-21 10:15:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-21 10:15:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:17,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069611061] [2020-09-21 10:15:17,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:17,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-21 10:15:17,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585014283] [2020-09-21 10:15:17,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:15:17,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:17,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:15:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:15:17,706 INFO L87 Difference]: Start difference. First operand 258 states and 306 transitions. Second operand 10 states. [2020-09-21 10:15:18,393 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:19,175 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:19,493 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:19,807 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:20,118 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:21,247 INFO L93 Difference]: Finished difference Result 502 states and 624 transitions. [2020-09-21 10:15:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:15:21,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-09-21 10:15:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:21,253 INFO L225 Difference]: With dead ends: 502 [2020-09-21 10:15:21,253 INFO L226 Difference]: Without dead ends: 272 [2020-09-21 10:15:21,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:15:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-21 10:15:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 233. [2020-09-21 10:15:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-09-21 10:15:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 264 transitions. [2020-09-21 10:15:21,317 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 264 transitions. Word has length 103 [2020-09-21 10:15:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:21,320 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 264 transitions. [2020-09-21 10:15:21,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:15:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 264 transitions. [2020-09-21 10:15:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-21 10:15:21,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:21,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:21,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:15:21,326 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 697480839, now seen corresponding path program 1 times [2020-09-21 10:15:21,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:21,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93875938] [2020-09-21 10:15:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,721 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:21,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:15:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:15:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:15:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:21,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93875938] [2020-09-21 10:15:21,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:21,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:15:21,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517430213] [2020-09-21 10:15:21,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:15:21,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:21,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:15:21,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:15:21,923 INFO L87 Difference]: Start difference. First operand 233 states and 264 transitions. Second operand 11 states. [2020-09-21 10:15:22,510 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:22,825 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:23,130 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:23,949 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:24,264 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:24,567 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:25,604 INFO L93 Difference]: Finished difference Result 482 states and 584 transitions. [2020-09-21 10:15:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:15:25,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 107 [2020-09-21 10:15:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:25,609 INFO L225 Difference]: With dead ends: 482 [2020-09-21 10:15:25,609 INFO L226 Difference]: Without dead ends: 277 [2020-09-21 10:15:25,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:15:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-21 10:15:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 237. [2020-09-21 10:15:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-09-21 10:15:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 268 transitions. [2020-09-21 10:15:25,672 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 268 transitions. Word has length 107 [2020-09-21 10:15:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:25,673 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 268 transitions. [2020-09-21 10:15:25,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:15:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 268 transitions. [2020-09-21 10:15:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-21 10:15:25,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:25,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:25,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:15:25,675 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:25,676 INFO L82 PathProgramCache]: Analyzing trace with hash 456940710, now seen corresponding path program 1 times [2020-09-21 10:15:25,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:25,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129255125] [2020-09-21 10:15:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:25,995 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:25,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:15:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:15:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:15:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:26,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129255125] [2020-09-21 10:15:26,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:26,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:15:26,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8054247] [2020-09-21 10:15:26,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:15:26,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:26,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:15:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:15:26,185 INFO L87 Difference]: Start difference. First operand 237 states and 268 transitions. Second operand 7 states. [2020-09-21 10:15:26,568 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:27,238 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:29,183 INFO L93 Difference]: Finished difference Result 651 states and 808 transitions. [2020-09-21 10:15:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:15:29,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-09-21 10:15:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:29,188 INFO L225 Difference]: With dead ends: 651 [2020-09-21 10:15:29,188 INFO L226 Difference]: Without dead ends: 442 [2020-09-21 10:15:29,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:15:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-09-21 10:15:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 404. [2020-09-21 10:15:29,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-09-21 10:15:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 472 transitions. [2020-09-21 10:15:29,256 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 472 transitions. Word has length 107 [2020-09-21 10:15:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:29,256 INFO L479 AbstractCegarLoop]: Abstraction has 404 states and 472 transitions. [2020-09-21 10:15:29,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:15:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 472 transitions. [2020-09-21 10:15:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-21 10:15:29,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:29,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:29,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:15:29,259 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1562894580, now seen corresponding path program 1 times [2020-09-21 10:15:29,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:29,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76116849] [2020-09-21 10:15:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,703 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:29,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:15:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:15:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-21 10:15:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-21 10:15:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:29,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76116849] [2020-09-21 10:15:29,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:29,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-21 10:15:29,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985240676] [2020-09-21 10:15:29,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:15:29,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:15:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:15:29,908 INFO L87 Difference]: Start difference. First operand 404 states and 472 transitions. Second operand 12 states. [2020-09-21 10:15:30,378 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:31,164 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:32,269 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:32,634 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:32,965 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:33,316 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:33,648 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:35,195 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:35,540 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:36,317 INFO L93 Difference]: Finished difference Result 1116 states and 1385 transitions. [2020-09-21 10:15:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 10:15:36,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-09-21 10:15:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:36,323 INFO L225 Difference]: With dead ends: 1116 [2020-09-21 10:15:36,323 INFO L226 Difference]: Without dead ends: 810 [2020-09-21 10:15:36,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:15:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-09-21 10:15:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 700. [2020-09-21 10:15:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-09-21 10:15:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 810 transitions. [2020-09-21 10:15:36,431 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 810 transitions. Word has length 111 [2020-09-21 10:15:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:36,431 INFO L479 AbstractCegarLoop]: Abstraction has 700 states and 810 transitions. [2020-09-21 10:15:36,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:15:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 810 transitions. [2020-09-21 10:15:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-09-21 10:15:36,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:36,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:36,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:15:36,436 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:36,436 INFO L82 PathProgramCache]: Analyzing trace with hash 903450751, now seen corresponding path program 1 times [2020-09-21 10:15:36,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:36,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408642531] [2020-09-21 10:15:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:36,855 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:36,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:36,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:36,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:36,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:36,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:36,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:36,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:36,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:15:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:15:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:15:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-21 10:15:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-21 10:15:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-21 10:15:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-21 10:15:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-21 10:15:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-21 10:15:37,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408642531] [2020-09-21 10:15:37,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:15:37,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:15:37,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455504643] [2020-09-21 10:15:37,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:15:37,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:15:37,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:15:37,321 INFO L87 Difference]: Start difference. First operand 700 states and 810 transitions. Second operand 16 states. [2020-09-21 10:15:38,002 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:38,437 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-21 10:15:38,779 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:15:39,110 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:15:39,897 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:40,263 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:41,156 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:41,960 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:42,502 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:43,031 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:43,360 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:43,739 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:44,410 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:44,885 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:45,352 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:46,127 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:46,463 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:47,171 INFO L93 Difference]: Finished difference Result 1513 states and 1807 transitions. [2020-09-21 10:15:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-21 10:15:47,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 172 [2020-09-21 10:15:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:47,178 INFO L225 Difference]: With dead ends: 1513 [2020-09-21 10:15:47,178 INFO L226 Difference]: Without dead ends: 907 [2020-09-21 10:15:47,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=568, Invalid=2084, Unknown=0, NotChecked=0, Total=2652 [2020-09-21 10:15:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2020-09-21 10:15:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 828. [2020-09-21 10:15:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-09-21 10:15:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 968 transitions. [2020-09-21 10:15:47,330 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 968 transitions. Word has length 172 [2020-09-21 10:15:47,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:47,331 INFO L479 AbstractCegarLoop]: Abstraction has 828 states and 968 transitions. [2020-09-21 10:15:47,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:15:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 968 transitions. [2020-09-21 10:15:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-09-21 10:15:47,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:47,365 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:47,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:15:47,365 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:47,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1791991912, now seen corresponding path program 1 times [2020-09-21 10:15:47,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:47,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624698570] [2020-09-21 10:15:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,737 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:47,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:15:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:15:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:15:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-21 10:15:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:15:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:15:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-09-21 10:15:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:15:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 10:15:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-09-21 10:15:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2020-09-21 10:15:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-21 10:15:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-21 10:15:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 78 proven. 29 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-09-21 10:15:48,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624698570] [2020-09-21 10:15:48,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:15:48,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:15:48,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577643745] [2020-09-21 10:15:48,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:15:48,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:15:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:15:48,293 INFO L87 Difference]: Start difference. First operand 828 states and 968 transitions. Second operand 15 states. [2020-09-21 10:15:50,150 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:50,502 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:50,835 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:51,158 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:52,700 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:53,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:53,981 INFO L93 Difference]: Finished difference Result 2180 states and 2653 transitions. [2020-09-21 10:15:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 10:15:53,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 303 [2020-09-21 10:15:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:53,990 INFO L225 Difference]: With dead ends: 2180 [2020-09-21 10:15:53,990 INFO L226 Difference]: Without dead ends: 1293 [2020-09-21 10:15:53,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:15:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2020-09-21 10:15:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1090. [2020-09-21 10:15:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-09-21 10:15:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1305 transitions. [2020-09-21 10:15:54,216 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1305 transitions. Word has length 303 [2020-09-21 10:15:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:54,217 INFO L479 AbstractCegarLoop]: Abstraction has 1090 states and 1305 transitions. [2020-09-21 10:15:54,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:15:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1305 transitions. [2020-09-21 10:15:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-09-21 10:15:54,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:54,231 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:54,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:15:54,231 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:54,232 INFO L82 PathProgramCache]: Analyzing trace with hash -943069261, now seen corresponding path program 1 times [2020-09-21 10:15:54,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:54,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494076070] [2020-09-21 10:15:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,624 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:54,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:15:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:15:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:15:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-21 10:15:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:15:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:15:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:15:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-21 10:15:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:15:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 10:15:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2020-09-21 10:15:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:54,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-09-21 10:15:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-09-21 10:15:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-21 10:15:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 85 proven. 38 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-09-21 10:15:55,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494076070] [2020-09-21 10:15:55,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:15:55,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:15:55,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658578041] [2020-09-21 10:15:55,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:15:55,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:55,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:15:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:15:55,142 INFO L87 Difference]: Start difference. First operand 1090 states and 1305 transitions. Second operand 16 states. [2020-09-21 10:15:55,714 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:56,115 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 193