/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_product38.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:13:44,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:13:44,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:13:44,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:13:44,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:13:44,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:13:44,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:13:44,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:13:44,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:13:44,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:13:44,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:13:44,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:13:44,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:13:44,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:13:44,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:13:44,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:13:44,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:13:44,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:13:44,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:13:44,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:13:44,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:13:44,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:13:44,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:13:44,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:13:44,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:13:44,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:13:44,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:13:44,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:13:44,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:13:44,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:13:44,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:13:44,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:13:44,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:13:44,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:13:44,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:13:44,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:13:44,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:13:44,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:13:44,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:13:44,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:13:44,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:13:44,214 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 10:13:44,275 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:13:44,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:13:44,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:13:44,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:13:44,277 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:13:44,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:13:44,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:13:44,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:13:44,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:13:44,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:13:44,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:13:44,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:13:44,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:13:44,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:13:44,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:13:44,282 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:13:44,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:13:44,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:13:44,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:13:44,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:13:44,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:13:44,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:13:44,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:13:44,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:13:44,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:13:44,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:13:44,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:13:44,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:13:44,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:13:44,286 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 10:13:44,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:13:44,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:13:44,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:13:44,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:13:44,767 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:13:44,770 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product38.cil.c [2020-09-21 10:13:44,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d3a0cd67/a6f9cbed39e84862922c9bd01750f131/FLAGf48e25114 [2020-09-21 10:13:45,498 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:13:45,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec5_product38.cil.c [2020-09-21 10:13:45,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d3a0cd67/a6f9cbed39e84862922c9bd01750f131/FLAGf48e25114 [2020-09-21 10:13:45,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d3a0cd67/a6f9cbed39e84862922c9bd01750f131 [2020-09-21 10:13:45,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:13:45,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:13:45,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:13:45,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:13:45,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:13:45,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:13:45" (1/1) ... [2020-09-21 10:13:45,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26497d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:45, skipping insertion in model container [2020-09-21 10:13:45,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:13:45" (1/1) ... [2020-09-21 10:13:45,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:13:45,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:13:46,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:13:46,329 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:13:46,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:13:46,506 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:13:46,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46 WrapperNode [2020-09-21 10:13:46,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:13:46,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:13:46,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:13:46,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:13:46,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (1/1) ... [2020-09-21 10:13:46,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (1/1) ... [2020-09-21 10:13:46,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (1/1) ... [2020-09-21 10:13:46,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (1/1) ... [2020-09-21 10:13:46,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (1/1) ... [2020-09-21 10:13:46,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (1/1) ... [2020-09-21 10:13:46,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (1/1) ... [2020-09-21 10:13:46,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:13:46,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:13:46,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:13:46,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:13:46,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (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 10:13:46,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:13:46,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:13:46,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-21 10:13:46,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-21 10:13:46,682 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-21 10:13:46,682 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-21 10:13:46,683 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-21 10:13:46,683 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-21 10:13:46,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:13:46,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2020-09-21 10:13:46,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2020-09-21 10:13:46,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2020-09-21 10:13:46,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-21 10:13:46,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-21 10:13:46,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-21 10:13:46,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-21 10:13:46,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-21 10:13:46,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-21 10:13:46,687 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-21 10:13:46,690 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-21 10:13:46,690 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-21 10:13:46,690 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-21 10:13:46,690 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-21 10:13:46,691 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-21 10:13:46,691 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-21 10:13:46,691 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-21 10:13:46,691 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-21 10:13:46,691 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:13:46,691 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-21 10:13:46,692 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-21 10:13:46,692 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-21 10:13:46,692 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-21 10:13:46,692 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-21 10:13:46,692 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-21 10:13:46,692 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-21 10:13:46,693 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-09-21 10:13:46,693 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-21 10:13:46,693 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-21 10:13:46,693 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-21 10:13:46,693 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-21 10:13:46,693 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-21 10:13:46,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:13:46,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:13:46,694 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:13:46,694 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-21 10:13:46,694 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-21 10:13:46,694 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-21 10:13:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-21 10:13:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-21 10:13:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-21 10:13:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-21 10:13:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-21 10:13:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2020-09-21 10:13:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-21 10:13:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-21 10:13:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-21 10:13:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-21 10:13:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-21 10:13:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:13:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-21 10:13:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-21 10:13:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2020-09-21 10:13:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2020-09-21 10:13:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-21 10:13:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:13:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:13:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-21 10:13:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:13:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:13:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:13:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:13:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-21 10:13:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:13:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-21 10:13:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-21 10:13:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:13:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-21 10:13:46,700 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-21 10:13:46,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:13:46,700 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-21 10:13:46,700 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-21 10:13:46,700 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-21 10:13:46,700 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-21 10:13:46,701 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-21 10:13:46,701 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-21 10:13:46,701 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-21 10:13:46,701 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-09-21 10:13:46,701 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-21 10:13:46,701 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-21 10:13:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-21 10:13:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:13:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-21 10:13:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-21 10:13:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:13:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:13:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:13:47,854 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:13:47,855 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 10:13:47,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:13:47 BoogieIcfgContainer [2020-09-21 10:13:47,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:13:47,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:13:47,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:13:47,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:13:47,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:13:45" (1/3) ... [2020-09-21 10:13:47,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6289a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:13:47, skipping insertion in model container [2020-09-21 10:13:47,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:13:46" (2/3) ... [2020-09-21 10:13:47,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6289a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:13:47, skipping insertion in model container [2020-09-21 10:13:47,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:13:47" (3/3) ... [2020-09-21 10:13:47,876 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product38.cil.c [2020-09-21 10:13:47,888 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:13:47,901 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:13:47,923 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:13:47,951 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:13:47,951 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:13:47,951 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:13:47,951 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:13:47,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:13:47,951 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:13:47,951 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:13:47,952 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:13:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states. [2020-09-21 10:13:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 10:13:47,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:13:47,992 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 10:13:47,992 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:13:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:13:48,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1109188308, now seen corresponding path program 1 times [2020-09-21 10:13:48,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:13:48,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304845826] [2020-09-21 10:13:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:13:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,806 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:13:48,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:13:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:13:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:13:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:13:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:13:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:13:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:13:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 10:13:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:48,960 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 10:13:48,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304845826] [2020-09-21 10:13:48,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:13:48,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:13:48,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359655973] [2020-09-21 10:13:48,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:13:48,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:13:48,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:13:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:13:48,996 INFO L87 Difference]: Start difference. First operand 183 states. Second operand 4 states. [2020-09-21 10:13:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:13:50,286 INFO L93 Difference]: Finished difference Result 309 states and 395 transitions. [2020-09-21 10:13:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:13:50,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-09-21 10:13:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:13:50,308 INFO L225 Difference]: With dead ends: 309 [2020-09-21 10:13:50,308 INFO L226 Difference]: Without dead ends: 170 [2020-09-21 10:13:50,314 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 10:13:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-21 10:13:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140. [2020-09-21 10:13:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-21 10:13:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2020-09-21 10:13:50,432 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 59 [2020-09-21 10:13:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:13:50,434 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2020-09-21 10:13:50,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:13:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2020-09-21 10:13:50,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 10:13:50,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:13:50,442 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] [2020-09-21 10:13:50,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:13:50,442 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:13:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:13:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash 813843432, now seen corresponding path program 1 times [2020-09-21 10:13:50,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:13:50,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436568200] [2020-09-21 10:13:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:13:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,918 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:13:50,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:13:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:13:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:13:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:13:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:13:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:13:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:13:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:50,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:13:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:51,003 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 10:13:51,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436568200] [2020-09-21 10:13:51,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:13:51,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:13:51,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297019170] [2020-09-21 10:13:51,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:13:51,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:13:51,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:13:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:13:51,007 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand 5 states. [2020-09-21 10:13:51,476 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:13:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:13:52,494 INFO L93 Difference]: Finished difference Result 250 states and 303 transitions. [2020-09-21 10:13:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:13:52,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-09-21 10:13:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:13:52,498 INFO L225 Difference]: With dead ends: 250 [2020-09-21 10:13:52,498 INFO L226 Difference]: Without dead ends: 160 [2020-09-21 10:13:52,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:13:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-21 10:13:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-09-21 10:13:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-21 10:13:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2020-09-21 10:13:52,541 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 60 [2020-09-21 10:13:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:13:52,542 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2020-09-21 10:13:52,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:13:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2020-09-21 10:13:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:13:52,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:13:52,545 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] [2020-09-21 10:13:52,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:13:52,546 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:13:52,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:13:52,546 INFO L82 PathProgramCache]: Analyzing trace with hash 605286682, now seen corresponding path program 1 times [2020-09-21 10:13:52,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:13:52,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894104176] [2020-09-21 10:13:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:13:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:52,976 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:13:52,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:13:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:13:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:13:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:13:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:13:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:13:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 10:13:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 10:13:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:53,099 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 10:13:53,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894104176] [2020-09-21 10:13:53,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:13:53,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:13:53,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655585884] [2020-09-21 10:13:53,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:13:53,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:13:53,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:13:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:13:53,102 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand 9 states. [2020-09-21 10:13:53,519 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:13:53,907 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:13:54,264 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:13:54,515 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:13:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:13:55,920 INFO L93 Difference]: Finished difference Result 263 states and 322 transitions. [2020-09-21 10:13:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:13:55,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-09-21 10:13:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:13:55,925 INFO L225 Difference]: With dead ends: 263 [2020-09-21 10:13:55,925 INFO L226 Difference]: Without dead ends: 160 [2020-09-21 10:13:55,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 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 10:13:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-21 10:13:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-09-21 10:13:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-21 10:13:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-09-21 10:13:55,959 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 65 [2020-09-21 10:13:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:13:55,960 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-09-21 10:13:55,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:13:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-09-21 10:13:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-21 10:13:55,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:13:55,963 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] [2020-09-21 10:13:55,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:13:55,964 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:13:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:13:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1239264208, now seen corresponding path program 1 times [2020-09-21 10:13:55,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:13:55,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543735716] [2020-09-21 10:13:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:13:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,381 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:13:56,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:13:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:13:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:13:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:13:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:13:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:13:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:13:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:13:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:13:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:13:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:13:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:56,522 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 10:13:56,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543735716] [2020-09-21 10:13:56,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:13:56,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:13:56,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089919548] [2020-09-21 10:13:56,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:13:56,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:13:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:13:56,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:13:56,526 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 7 states. [2020-09-21 10:13:56,970 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:13:58,675 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:13:59,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:13:59,307 INFO L93 Difference]: Finished difference Result 367 states and 456 transitions. [2020-09-21 10:13:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:13:59,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2020-09-21 10:13:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:13:59,311 INFO L225 Difference]: With dead ends: 367 [2020-09-21 10:13:59,312 INFO L226 Difference]: Without dead ends: 264 [2020-09-21 10:13:59,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 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 10:13:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-21 10:13:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 218. [2020-09-21 10:13:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-09-21 10:13:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 249 transitions. [2020-09-21 10:13:59,359 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 249 transitions. Word has length 78 [2020-09-21 10:13:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:13:59,359 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 249 transitions. [2020-09-21 10:13:59,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:13:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 249 transitions. [2020-09-21 10:13:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-21 10:13:59,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:13:59,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:13:59,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:13:59,362 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:13:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:13:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash 462053503, now seen corresponding path program 1 times [2020-09-21 10:13:59,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:13:59,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622693644] [2020-09-21 10:13:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:13:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,711 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:13:59,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:13:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:13:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:13:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:13:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:13:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:13:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:13:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:13:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:13:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:13:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:13:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:13:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:13:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:13:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:13:59,913 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 10:13:59,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622693644] [2020-09-21 10:13:59,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:13:59,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:13:59,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099795130] [2020-09-21 10:13:59,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:13:59,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:13:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:13:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:13:59,916 INFO L87 Difference]: Start difference. First operand 218 states and 249 transitions. Second operand 9 states. [2020-09-21 10:14:00,393 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:01,217 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:02,041 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:02,447 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:03,005 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:03,313 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:14:04,011 INFO L93 Difference]: Finished difference Result 453 states and 550 transitions. [2020-09-21 10:14:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:14:04,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 92 [2020-09-21 10:14:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:14:04,016 INFO L225 Difference]: With dead ends: 453 [2020-09-21 10:14:04,016 INFO L226 Difference]: Without dead ends: 263 [2020-09-21 10:14:04,017 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 10:14:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-21 10:14:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 217. [2020-09-21 10:14:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-09-21 10:14:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 246 transitions. [2020-09-21 10:14:04,091 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 246 transitions. Word has length 92 [2020-09-21 10:14:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:14:04,092 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 246 transitions. [2020-09-21 10:14:04,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:14:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 246 transitions. [2020-09-21 10:14:04,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:14:04,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:04,094 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] [2020-09-21 10:14:04,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:14:04,094 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash -440444759, now seen corresponding path program 1 times [2020-09-21 10:14:04,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:04,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667525668] [2020-09-21 10:14:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,402 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:14:04,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:14:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:14:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:14:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:14:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:14:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:14:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:14:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-21 10:14:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:04,543 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 10:14:04,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667525668] [2020-09-21 10:14:04,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:14:04,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:14:04,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622734785] [2020-09-21 10:14:04,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:14:04,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:14:04,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:14:04,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:14:04,545 INFO L87 Difference]: Start difference. First operand 217 states and 246 transitions. Second operand 9 states. [2020-09-21 10:14:05,603 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:05,907 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:06,229 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:06,539 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:14:07,360 INFO L93 Difference]: Finished difference Result 451 states and 544 transitions. [2020-09-21 10:14:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:14:07,361 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-09-21 10:14:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:14:07,363 INFO L225 Difference]: With dead ends: 451 [2020-09-21 10:14:07,363 INFO L226 Difference]: Without dead ends: 262 [2020-09-21 10:14:07,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:14:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-21 10:14:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 222. [2020-09-21 10:14:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-21 10:14:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 251 transitions. [2020-09-21 10:14:07,406 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 251 transitions. Word has length 93 [2020-09-21 10:14:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:14:07,406 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 251 transitions. [2020-09-21 10:14:07,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:14:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 251 transitions. [2020-09-21 10:14:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:14:07,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:07,408 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] [2020-09-21 10:14:07,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:14:07,408 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash 261155115, now seen corresponding path program 1 times [2020-09-21 10:14:07,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:07,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052391124] [2020-09-21 10:14:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,761 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:14:07,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:14:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:14:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:14:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:14:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:14:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:14:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:14:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-21 10:14:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:07,928 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 10:14:07,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052391124] [2020-09-21 10:14:07,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:14:07,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:14:07,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232068898] [2020-09-21 10:14:07,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:14:07,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:14:07,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:14:07,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:14:07,930 INFO L87 Difference]: Start difference. First operand 222 states and 251 transitions. Second operand 11 states. [2020-09-21 10:14:08,548 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:08,851 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:09,140 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:09,978 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:10,295 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:10,617 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:14:11,579 INFO L93 Difference]: Finished difference Result 463 states and 564 transitions. [2020-09-21 10:14:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:14:11,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-09-21 10:14:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:14:11,584 INFO L225 Difference]: With dead ends: 463 [2020-09-21 10:14:11,584 INFO L226 Difference]: Without dead ends: 269 [2020-09-21 10:14:11,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 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 10:14:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-21 10:14:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 226. [2020-09-21 10:14:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-21 10:14:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2020-09-21 10:14:11,629 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 93 [2020-09-21 10:14:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:14:11,629 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2020-09-21 10:14:11,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:14:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2020-09-21 10:14:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:14:11,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:11,631 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] [2020-09-21 10:14:11,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:14:11,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:11,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1986636012, now seen corresponding path program 1 times [2020-09-21 10:14:11,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:11,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989755118] [2020-09-21 10:14:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:11,959 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:14:11,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:14:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:14:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:14:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:14:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:14:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:14:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:14:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-21 10:14:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:12,143 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 10:14:12,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989755118] [2020-09-21 10:14:12,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:14:12,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:14:12,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063831327] [2020-09-21 10:14:12,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:14:12,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:14:12,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:14:12,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:14:12,150 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand 7 states. [2020-09-21 10:14:12,530 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:13,159 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:14:15,252 INFO L93 Difference]: Finished difference Result 645 states and 802 transitions. [2020-09-21 10:14:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:14:15,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-09-21 10:14:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:14:15,257 INFO L225 Difference]: With dead ends: 645 [2020-09-21 10:14:15,257 INFO L226 Difference]: Without dead ends: 447 [2020-09-21 10:14:15,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 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 10:14:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-09-21 10:14:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 405. [2020-09-21 10:14:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-09-21 10:14:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 471 transitions. [2020-09-21 10:14:15,345 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 471 transitions. Word has length 93 [2020-09-21 10:14:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:14:15,346 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 471 transitions. [2020-09-21 10:14:15,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:14:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 471 transitions. [2020-09-21 10:14:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-21 10:14:15,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:15,348 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] [2020-09-21 10:14:15,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:14:15,348 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1429929390, now seen corresponding path program 1 times [2020-09-21 10:14:15,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:15,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448717582] [2020-09-21 10:14:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,771 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:14:15,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:14:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:14:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:14:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:14:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:14:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:14:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-21 10:14:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-21 10:14:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:15,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-21 10:14:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:16,001 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 10:14:16,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448717582] [2020-09-21 10:14:16,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:14:16,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-21 10:14:16,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123865567] [2020-09-21 10:14:16,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:14:16,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:14:16,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:14:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:14:16,004 INFO L87 Difference]: Start difference. First operand 405 states and 471 transitions. Second operand 12 states. [2020-09-21 10:14:16,509 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:17,289 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:18,503 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:18,893 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:19,200 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:19,545 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:19,891 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:21,219 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:21,555 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:14:22,249 INFO L93 Difference]: Finished difference Result 1123 states and 1390 transitions. [2020-09-21 10:14:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 10:14:22,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-09-21 10:14:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:14:22,255 INFO L225 Difference]: With dead ends: 1123 [2020-09-21 10:14:22,255 INFO L226 Difference]: Without dead ends: 820 [2020-09-21 10:14:22,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:14:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2020-09-21 10:14:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 698. [2020-09-21 10:14:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-09-21 10:14:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 804 transitions. [2020-09-21 10:14:22,385 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 804 transitions. Word has length 97 [2020-09-21 10:14:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:14:22,385 INFO L479 AbstractCegarLoop]: Abstraction has 698 states and 804 transitions. [2020-09-21 10:14:22,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:14:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 804 transitions. [2020-09-21 10:14:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-21 10:14:22,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:22,388 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:14:22,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:14:22,389 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:22,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:22,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1557984819, now seen corresponding path program 1 times [2020-09-21 10:14:22,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:22,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636191047] [2020-09-21 10:14:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:22,840 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:14:22,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:22,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:14:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:22,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:22,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:14:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:22,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:14:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:22,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:14:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:22,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:14:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:22,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:14:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:14:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:14:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-21 10:14:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-21 10:14:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-21 10:14:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:14:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-21 10:14:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-21 10:14:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-21 10:14:23,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636191047] [2020-09-21 10:14:23,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:14:23,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:14:23,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304882148] [2020-09-21 10:14:23,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:14:23,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:14:23,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:14:23,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:14:23,279 INFO L87 Difference]: Start difference. First operand 698 states and 804 transitions. Second operand 16 states. [2020-09-21 10:14:23,924 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:24,296 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:14:24,607 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:14:24,946 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:14:25,760 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:26,113 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:27,028 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:27,454 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:14:28,418 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:28,759 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:14:29,089 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:14:29,478 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:30,153 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:30,639 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:31,086 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:14:31,845 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:32,197 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:14:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:14:32,825 INFO L93 Difference]: Finished difference Result 1539 states and 1827 transitions. [2020-09-21 10:14:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-21 10:14:32,826 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 157 [2020-09-21 10:14:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:14:32,832 INFO L225 Difference]: With dead ends: 1539 [2020-09-21 10:14:32,832 INFO L226 Difference]: Without dead ends: 939 [2020-09-21 10:14:32,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 65 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 10:14:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2020-09-21 10:14:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 846. [2020-09-21 10:14:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 846 states. [2020-09-21 10:14:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 982 transitions. [2020-09-21 10:14:32,992 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 982 transitions. Word has length 157 [2020-09-21 10:14:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:14:32,993 INFO L479 AbstractCegarLoop]: Abstraction has 846 states and 982 transitions. [2020-09-21 10:14:32,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:14:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 982 transitions. [2020-09-21 10:14:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-09-21 10:14:32,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:32,999 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:14:32,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:14:33,000 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2097362584, now seen corresponding path program 1 times [2020-09-21 10:14:33,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:33,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734003610] [2020-09-21 10:14:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,353 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:14:33,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:14:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:14:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:14:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:14:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:14:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:14:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:14:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:14:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:14:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:14:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:14:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:14:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-21 10:14:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:14:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:14:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:14:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-09-21 10:14:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-09-21 10:14:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-09-21 10:14:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-09-21 10:14:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-21 10:14:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 84 proven. 29 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-09-21 10:14:33,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734003610] [2020-09-21 10:14:33,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:14:33,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:14:33,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819506013] [2020-09-21 10:14:33,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:14:33,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:14:33,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:14:33,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:14:33,930 INFO L87 Difference]: Start difference. First operand 846 states and 982 transitions. Second operand 15 states. [2020-09-21 10:14:36,200 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:14:36,567 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:36,900 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:37,228 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:38,885 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:14:39,616 INFO L93 Difference]: Finished difference Result 2234 states and 2701 transitions. [2020-09-21 10:14:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 10:14:39,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 277 [2020-09-21 10:14:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:14:39,625 INFO L225 Difference]: With dead ends: 2234 [2020-09-21 10:14:39,625 INFO L226 Difference]: Without dead ends: 1321 [2020-09-21 10:14:39,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:14:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2020-09-21 10:14:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1119. [2020-09-21 10:14:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2020-09-21 10:14:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1329 transitions. [2020-09-21 10:14:39,810 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1329 transitions. Word has length 277 [2020-09-21 10:14:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:14:39,811 INFO L479 AbstractCegarLoop]: Abstraction has 1119 states and 1329 transitions. [2020-09-21 10:14:39,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:14:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1329 transitions. [2020-09-21 10:14:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-09-21 10:14:39,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:39,818 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:39,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:14:39,819 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:39,819 INFO L82 PathProgramCache]: Analyzing trace with hash -924921395, now seen corresponding path program 1 times [2020-09-21 10:14:39,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:39,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997064337] [2020-09-21 10:14:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,197 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:14:40,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:14:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:14:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:14:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:14:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:14:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:14:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:14:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:14:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:14:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:14:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:14:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:14:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:14:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-21 10:14:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:14:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:14:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:14:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-09-21 10:14:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-09-21 10:14:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-09-21 10:14:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:14:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:14:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:14:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-21 10:14:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-09-21 10:14:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 91 proven. 36 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-09-21 10:14:40,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997064337] [2020-09-21 10:14:40,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:14:40,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:14:40,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514748844] [2020-09-21 10:14:40,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:14:40,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:14:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:14:40,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:14:40,642 INFO L87 Difference]: Start difference. First operand 1119 states and 1329 transitions. Second operand 16 states. [2020-09-21 10:14:41,295 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:14:41,750 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:42,093 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:42,424 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:14:43,272 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 191