/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_spec2_product62.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:06:16,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:06:16,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:06:16,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:06:16,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:06:16,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:06:16,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:06:16,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:06:16,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:06:16,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:06:16,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:06:16,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:06:16,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:06:16,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:06:16,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:06:16,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:06:16,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:06:16,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:06:16,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:06:16,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:06:16,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:06:16,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:06:16,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:06:16,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:06:16,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:06:16,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:06:16,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:06:16,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:06:16,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:06:16,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:06:16,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:06:16,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:06:16,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:06:16,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:06:16,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:06:16,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:06:16,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:06:16,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:06:16,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:06:16,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:06:16,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:06:16,078 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 10:06:16,105 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:06:16,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:06:16,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:06:16,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:06:16,107 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:06:16,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:06:16,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:06:16,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:06:16,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:06:16,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:06:16,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:06:16,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:06:16,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:06:16,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:06:16,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:06:16,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:06:16,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:06:16,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:06:16,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:06:16,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:06:16,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:06:16,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:06:16,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:06:16,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:06:16,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:06:16,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:06:16,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:06:16,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:06:16,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:06:16,112 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 10:06:16,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:06:16,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:06:16,574 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:06:16,576 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:06:16,576 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:06:16,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product62.cil.c [2020-09-21 10:06:16,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/806d433e7/175af76a28684df686766b7fb5be83b6/FLAG3237866b0 [2020-09-21 10:06:17,304 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:06:17,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product62.cil.c [2020-09-21 10:06:17,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/806d433e7/175af76a28684df686766b7fb5be83b6/FLAG3237866b0 [2020-09-21 10:06:17,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/806d433e7/175af76a28684df686766b7fb5be83b6 [2020-09-21 10:06:17,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:06:17,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:06:17,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:06:17,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:06:17,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:06:17,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:06:17" (1/1) ... [2020-09-21 10:06:17,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d96e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:17, skipping insertion in model container [2020-09-21 10:06:17,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:06:17" (1/1) ... [2020-09-21 10:06:17,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:06:17,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:06:18,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:06:18,239 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:06:18,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:06:18,396 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:06:18,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18 WrapperNode [2020-09-21 10:06:18,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:06:18,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:06:18,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:06:18,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:06:18,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (1/1) ... [2020-09-21 10:06:18,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (1/1) ... [2020-09-21 10:06:18,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (1/1) ... [2020-09-21 10:06:18,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (1/1) ... [2020-09-21 10:06:18,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (1/1) ... [2020-09-21 10:06:18,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (1/1) ... [2020-09-21 10:06:18,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (1/1) ... [2020-09-21 10:06:18,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:06:18,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:06:18,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:06:18,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:06:18,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (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 10:06:18,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:06:18,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:06:18,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-21 10:06:18,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-21 10:06:18,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-21 10:06:18,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-21 10:06:18,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-21 10:06:18,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-21 10:06:18,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-21 10:06:18,601 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-21 10:06:18,601 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-21 10:06:18,602 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-21 10:06:18,602 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-21 10:06:18,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:06:18,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-21 10:06:18,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-09-21 10:06:18,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-09-21 10:06:18,604 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-21 10:06:18,604 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-21 10:06:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-21 10:06:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-21 10:06:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-21 10:06:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-21 10:06:18,605 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-21 10:06:18,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-09-21 10:06:18,607 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-21 10:06:18,607 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-21 10:06:18,607 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-21 10:06:18,607 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-21 10:06:18,607 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-21 10:06:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-21 10:06:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-21 10:06:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:06:18,608 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-09-21 10:06:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-21 10:06:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-09-21 10:06:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-21 10:06:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-21 10:06:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-21 10:06:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-21 10:06:18,610 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-21 10:06:18,610 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-21 10:06:18,610 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-09-21 10:06:18,611 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-09-21 10:06:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:06:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:06:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:06:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-21 10:06:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:06:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:06:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-21 10:06:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:06:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:06:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:06:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:06:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-21 10:06:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:06:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-21 10:06:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-21 10:06:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:06:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-21 10:06:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-21 10:06:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:06:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-21 10:06:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-21 10:06:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-21 10:06:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-21 10:06:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-21 10:06:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-21 10:06:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-21 10:06:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-21 10:06:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-09-21 10:06:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-21 10:06:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-21 10:06:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-21 10:06:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-21 10:06:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-21 10:06:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:06:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-21 10:06:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-21 10:06:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-21 10:06:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-09-21 10:06:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-21 10:06:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-21 10:06:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-21 10:06:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-21 10:06:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-09-21 10:06:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-21 10:06:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-09-21 10:06:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-21 10:06:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-21 10:06:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-21 10:06:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-21 10:06:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-21 10:06:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:06:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-09-21 10:06:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-09-21 10:06:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-21 10:06:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-09-21 10:06:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:06:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:06:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:06:19,941 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:06:19,941 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 10:06:19,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:06:19 BoogieIcfgContainer [2020-09-21 10:06:19,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:06:19,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:06:19,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:06:19,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:06:19,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:06:17" (1/3) ... [2020-09-21 10:06:19,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2310acf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:06:19, skipping insertion in model container [2020-09-21 10:06:19,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:06:18" (2/3) ... [2020-09-21 10:06:19,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2310acf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:06:19, skipping insertion in model container [2020-09-21 10:06:19,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:06:19" (3/3) ... [2020-09-21 10:06:19,961 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product62.cil.c [2020-09-21 10:06:19,974 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:06:19,987 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:06:20,012 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:06:20,052 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:06:20,052 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:06:20,052 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:06:20,052 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:06:20,053 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:06:20,053 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:06:20,053 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:06:20,053 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:06:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states. [2020-09-21 10:06:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:06:20,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:20,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:20,093 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:20,101 INFO L82 PathProgramCache]: Analyzing trace with hash -519940638, now seen corresponding path program 1 times [2020-09-21 10:06:20,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:20,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481074508] [2020-09-21 10:06:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:20,929 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:20,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:21,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:21,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:21,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:21,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:21,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:21,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 10:06:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:21,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:06:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:21,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481074508] [2020-09-21 10:06:21,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:21,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:06:21,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288470408] [2020-09-21 10:06:21,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:06:21,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:06:21,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:06:21,134 INFO L87 Difference]: Start difference. First operand 202 states. Second operand 4 states. [2020-09-21 10:06:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:22,483 INFO L93 Difference]: Finished difference Result 354 states and 460 transitions. [2020-09-21 10:06:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:06:22,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-09-21 10:06:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:22,505 INFO L225 Difference]: With dead ends: 354 [2020-09-21 10:06:22,505 INFO L226 Difference]: Without dead ends: 196 [2020-09-21 10:06:22,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 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 10:06:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-21 10:06:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 159. [2020-09-21 10:06:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-21 10:06:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2020-09-21 10:06:22,659 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 51 [2020-09-21 10:06:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:22,659 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2020-09-21 10:06:22,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:06:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2020-09-21 10:06:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 10:06:22,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:22,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:22,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:06:22,672 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -183354494, now seen corresponding path program 1 times [2020-09-21 10:06:22,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:22,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677887468] [2020-09-21 10:06:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,130 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:23,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:06:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:06:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:23,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677887468] [2020-09-21 10:06:23,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:23,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:06:23,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624217077] [2020-09-21 10:06:23,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:06:23,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:06:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:06:23,210 INFO L87 Difference]: Start difference. First operand 159 states and 189 transitions. Second operand 5 states. [2020-09-21 10:06:23,708 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:25,063 INFO L93 Difference]: Finished difference Result 295 states and 367 transitions. [2020-09-21 10:06:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:06:25,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-09-21 10:06:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:25,068 INFO L225 Difference]: With dead ends: 295 [2020-09-21 10:06:25,069 INFO L226 Difference]: Without dead ends: 186 [2020-09-21 10:06:25,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 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 10:06:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-21 10:06:25,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 150. [2020-09-21 10:06:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-21 10:06:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2020-09-21 10:06:25,120 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 52 [2020-09-21 10:06:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:25,120 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2020-09-21 10:06:25,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:06:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2020-09-21 10:06:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:06:25,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:25,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:25,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:06:25,123 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1707012514, now seen corresponding path program 1 times [2020-09-21 10:06:25,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:25,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122355114] [2020-09-21 10:06:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,549 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:25,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:06:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:06:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:25,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122355114] [2020-09-21 10:06:25,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:25,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:06:25,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620447699] [2020-09-21 10:06:25,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:06:25,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:06:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:06:25,720 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand 9 states. [2020-09-21 10:06:26,159 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:26,538 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:26,843 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:27,155 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:28,933 INFO L93 Difference]: Finished difference Result 308 states and 386 transitions. [2020-09-21 10:06:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:06:28,934 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-09-21 10:06:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:28,957 INFO L225 Difference]: With dead ends: 308 [2020-09-21 10:06:28,957 INFO L226 Difference]: Without dead ends: 186 [2020-09-21 10:06:28,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 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 10:06:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-21 10:06:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 150. [2020-09-21 10:06:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-21 10:06:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 176 transitions. [2020-09-21 10:06:29,021 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 176 transitions. Word has length 57 [2020-09-21 10:06:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:29,024 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 176 transitions. [2020-09-21 10:06:29,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:06:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 176 transitions. [2020-09-21 10:06:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 10:06:29,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:29,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:29,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:06:29,028 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1819519357, now seen corresponding path program 1 times [2020-09-21 10:06:29,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:29,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750227903] [2020-09-21 10:06:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,424 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:29,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:06:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-21 10:06:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-21 10:06:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:29,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750227903] [2020-09-21 10:06:29,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:29,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:06:29,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805807170] [2020-09-21 10:06:29,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:06:29,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:29,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:06:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:06:29,553 INFO L87 Difference]: Start difference. First operand 150 states and 176 transitions. Second operand 7 states. [2020-09-21 10:06:29,962 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:31,462 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:32,694 INFO L93 Difference]: Finished difference Result 418 states and 526 transitions. [2020-09-21 10:06:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:06:32,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-09-21 10:06:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:32,699 INFO L225 Difference]: With dead ends: 418 [2020-09-21 10:06:32,699 INFO L226 Difference]: Without dead ends: 296 [2020-09-21 10:06:32,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:06:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-09-21 10:06:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 247. [2020-09-21 10:06:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-09-21 10:06:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 282 transitions. [2020-09-21 10:06:32,760 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 282 transitions. Word has length 75 [2020-09-21 10:06:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:32,760 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 282 transitions. [2020-09-21 10:06:32,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:06:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 282 transitions. [2020-09-21 10:06:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-21 10:06:32,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:32,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:32,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:06:32,763 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:32,763 INFO L82 PathProgramCache]: Analyzing trace with hash 948942276, now seen corresponding path program 1 times [2020-09-21 10:06:32,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:32,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864121361] [2020-09-21 10:06:32,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,092 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:33,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:06:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-21 10:06:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-21 10:06:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:33,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864121361] [2020-09-21 10:06:33,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:33,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:06:33,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450800981] [2020-09-21 10:06:33,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:06:33,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:33,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:06:33,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:06:33,228 INFO L87 Difference]: Start difference. First operand 247 states and 282 transitions. Second operand 9 states. [2020-09-21 10:06:33,646 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:34,888 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:35,300 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:36,071 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:36,359 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:37,981 INFO L93 Difference]: Finished difference Result 737 states and 912 transitions. [2020-09-21 10:06:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:06:37,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-09-21 10:06:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:37,987 INFO L225 Difference]: With dead ends: 737 [2020-09-21 10:06:37,987 INFO L226 Difference]: Without dead ends: 518 [2020-09-21 10:06:37,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:06:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-09-21 10:06:38,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 442. [2020-09-21 10:06:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-09-21 10:06:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 504 transitions. [2020-09-21 10:06:38,094 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 504 transitions. Word has length 89 [2020-09-21 10:06:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:38,095 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 504 transitions. [2020-09-21 10:06:38,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:06:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 504 transitions. [2020-09-21 10:06:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:06:38,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:38,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:38,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:06:38,098 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1944159016, now seen corresponding path program 1 times [2020-09-21 10:06:38,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:38,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850158990] [2020-09-21 10:06:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,467 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:38,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:06:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:06:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:06:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-21 10:06:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:06:38,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850158990] [2020-09-21 10:06:38,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:38,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-21 10:06:38,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076971487] [2020-09-21 10:06:38,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:06:38,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:06:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:06:38,649 INFO L87 Difference]: Start difference. First operand 442 states and 504 transitions. Second operand 10 states. [2020-09-21 10:06:39,089 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:40,597 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:41,959 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:42,258 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:42,600 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:43,207 INFO L93 Difference]: Finished difference Result 970 states and 1183 transitions. [2020-09-21 10:06:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:06:43,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-09-21 10:06:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:43,214 INFO L225 Difference]: With dead ends: 970 [2020-09-21 10:06:43,214 INFO L226 Difference]: Without dead ends: 556 [2020-09-21 10:06:43,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:06:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-09-21 10:06:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 441. [2020-09-21 10:06:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-09-21 10:06:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 501 transitions. [2020-09-21 10:06:43,316 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 501 transitions. Word has length 93 [2020-09-21 10:06:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:43,317 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 501 transitions. [2020-09-21 10:06:43,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:06:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 501 transitions. [2020-09-21 10:06:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 10:06:43,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:43,319 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:43,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:06:43,320 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash -412136482, now seen corresponding path program 1 times [2020-09-21 10:06:43,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:43,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165482038] [2020-09-21 10:06:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,610 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:43,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:06:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:06:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-21 10:06:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:06:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:43,831 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 10:06:43,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165482038] [2020-09-21 10:06:43,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:43,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-21 10:06:43,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965363097] [2020-09-21 10:06:43,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:06:43,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:06:43,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:06:43,839 INFO L87 Difference]: Start difference. First operand 441 states and 501 transitions. Second operand 10 states. [2020-09-21 10:06:45,137 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:06:45,476 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:06:45,799 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:46,116 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:47,821 INFO L93 Difference]: Finished difference Result 977 states and 1216 transitions. [2020-09-21 10:06:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:06:47,823 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2020-09-21 10:06:47,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:47,828 INFO L225 Difference]: With dead ends: 977 [2020-09-21 10:06:47,828 INFO L226 Difference]: Without dead ends: 564 [2020-09-21 10:06:47,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:06:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-09-21 10:06:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 451. [2020-09-21 10:06:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-09-21 10:06:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 511 transitions. [2020-09-21 10:06:47,928 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 511 transitions. Word has length 109 [2020-09-21 10:06:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:47,929 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 511 transitions. [2020-09-21 10:06:47,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:06:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 511 transitions. [2020-09-21 10:06:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 10:06:47,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:47,932 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:47,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:06:47,932 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1527025564, now seen corresponding path program 1 times [2020-09-21 10:06:47,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:47,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226251509] [2020-09-21 10:06:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,313 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:48,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:06:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:06:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-21 10:06:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:06:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:48,592 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 10:06:48,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226251509] [2020-09-21 10:06:48,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:48,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-21 10:06:48,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957774194] [2020-09-21 10:06:48,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:06:48,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:06:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:06:48,597 INFO L87 Difference]: Start difference. First operand 451 states and 511 transitions. Second operand 12 states. [2020-09-21 10:06:49,458 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:49,777 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:50,092 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:51,003 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:51,338 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:51,660 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:06:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:53,525 INFO L93 Difference]: Finished difference Result 997 states and 1238 transitions. [2020-09-21 10:06:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:06:53,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 109 [2020-09-21 10:06:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:53,530 INFO L225 Difference]: With dead ends: 997 [2020-09-21 10:06:53,530 INFO L226 Difference]: Without dead ends: 574 [2020-09-21 10:06:53,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:06:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-09-21 10:06:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 459. [2020-09-21 10:06:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-09-21 10:06:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 519 transitions. [2020-09-21 10:06:53,610 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 519 transitions. Word has length 109 [2020-09-21 10:06:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:53,610 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 519 transitions. [2020-09-21 10:06:53,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:06:53,611 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 519 transitions. [2020-09-21 10:06:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 10:06:53,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:53,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:53,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:06:53,613 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1998771717, now seen corresponding path program 1 times [2020-09-21 10:06:53,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:53,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816926305] [2020-09-21 10:06:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:53,977 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:53,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:06:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:06:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-21 10:06:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:06:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:54,272 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 10:06:54,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816926305] [2020-09-21 10:06:54,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:06:54,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:06:54,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900500996] [2020-09-21 10:06:54,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:06:54,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:06:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:06:54,274 INFO L87 Difference]: Start difference. First operand 459 states and 519 transitions. Second operand 8 states. [2020-09-21 10:06:54,674 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:55,343 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:06:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:06:58,456 INFO L93 Difference]: Finished difference Result 1365 states and 1751 transitions. [2020-09-21 10:06:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:06:58,457 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-09-21 10:06:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:06:58,463 INFO L225 Difference]: With dead ends: 1365 [2020-09-21 10:06:58,464 INFO L226 Difference]: Without dead ends: 934 [2020-09-21 10:06:58,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:06:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-21 10:06:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 789. [2020-09-21 10:06:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2020-09-21 10:06:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 921 transitions. [2020-09-21 10:06:58,660 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 921 transitions. Word has length 109 [2020-09-21 10:06:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:06:58,661 INFO L479 AbstractCegarLoop]: Abstraction has 789 states and 921 transitions. [2020-09-21 10:06:58,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:06:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 921 transitions. [2020-09-21 10:06:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-21 10:06:58,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:06:58,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:06:58,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:06:58,664 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:06:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:06:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1262789055, now seen corresponding path program 1 times [2020-09-21 10:06:58,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:06:58,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291508479] [2020-09-21 10:06:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:06:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,038 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:06:59,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:06:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:06:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:06:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:06:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:06:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:06:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:06:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:06:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:06:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:06:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:06:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:06:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:06:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-21 10:06:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:06:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:06:59,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291508479] [2020-09-21 10:06:59,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:06:59,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 10:06:59,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664485771] [2020-09-21 10:06:59,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 10:06:59,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:06:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 10:06:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:06:59,609 INFO L87 Difference]: Start difference. First operand 789 states and 921 transitions. Second operand 18 states. [2020-09-21 10:07:00,496 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:07:00,993 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:01,252 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:01,563 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:02,480 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:07:03,838 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:04,242 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:04,623 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:04,985 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:05,423 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:05,790 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:06,474 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 193 [2020-09-21 10:07:07,199 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 193 [2020-09-21 10:07:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:07:10,822 INFO L93 Difference]: Finished difference Result 1665 states and 2044 transitions. [2020-09-21 10:07:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-21 10:07:10,823 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-09-21 10:07:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:07:10,830 INFO L225 Difference]: With dead ends: 1665 [2020-09-21 10:07:10,830 INFO L226 Difference]: Without dead ends: 904 [2020-09-21 10:07:10,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2020-09-21 10:07:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-09-21 10:07:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 768. [2020-09-21 10:07:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-09-21 10:07:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 886 transitions. [2020-09-21 10:07:10,965 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 886 transitions. Word has length 113 [2020-09-21 10:07:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:07:10,966 INFO L479 AbstractCegarLoop]: Abstraction has 768 states and 886 transitions. [2020-09-21 10:07:10,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 10:07:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 886 transitions. [2020-09-21 10:07:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-09-21 10:07:10,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:07:10,970 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:07:10,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:07:10,970 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:07:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:07:10,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1271659967, now seen corresponding path program 1 times [2020-09-21 10:07:10,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:07:10,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544832238] [2020-09-21 10:07:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:07:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,365 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:07:11,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:07:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:07:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:07:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:07:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:07:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:07:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:07:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:07:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:07:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:07:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:07:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:07:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:07:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:07:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:07:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:07:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:07:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 10:07:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:07:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-21 10:07:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-21 10:07:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-21 10:07:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:07:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:07:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:07:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:07:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:07:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:07:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:07:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-21 10:07:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-21 10:07:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:07:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-21 10:07:11,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544832238] [2020-09-21 10:07:11,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:07:11,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:07:11,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050311609] [2020-09-21 10:07:11,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:07:11,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:07:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:07:11,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:07:11,824 INFO L87 Difference]: Start difference. First operand 768 states and 886 transitions. Second operand 19 states. [2020-09-21 10:07:12,568 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:07:12,984 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:13,321 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:07:13,640 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 192