/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product63.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:34:36,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:34:36,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:34:36,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:34:36,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:34:36,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:34:36,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:34:36,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:34:36,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:34:36,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:34:36,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:34:36,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:34:36,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:34:36,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:34:36,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:34:36,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:34:36,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:34:36,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:34:36,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:34:36,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:34:36,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:34:36,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:34:36,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:34:36,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:34:36,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:34:36,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:34:36,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:34:36,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:34:36,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:34:36,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:34:36,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:34:36,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:34:36,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:34:36,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:34:36,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:34:36,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:34:36,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:34:36,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:34:36,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:34:36,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:34:36,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:34:36,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 18:34:36,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:34:36,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:34:36,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:34:36,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:34:36,438 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:34:36,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:34:36,438 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:34:36,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:34:36,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:34:36,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:34:36,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:34:36,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:34:36,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:34:36,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:34:36,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:34:36,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:34:36,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:34:36,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:34:36,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:34:36,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:34:36,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:34:36,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:34:36,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:34:36,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:34:36,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:34:36,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:34:36,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:34:36,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:34:36,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:34:36,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:34:36,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:34:36,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:34:36,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:34:36,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:34:36,801 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:34:36,802 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product63.cil.c [2020-08-18 18:34:36,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ae139a0/98764cf71f464660aa2733971019aed3/FLAG31cc00f9c [2020-08-18 18:34:37,414 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:34:37,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product63.cil.c [2020-08-18 18:34:37,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ae139a0/98764cf71f464660aa2733971019aed3/FLAG31cc00f9c [2020-08-18 18:34:37,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ae139a0/98764cf71f464660aa2733971019aed3 [2020-08-18 18:34:37,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:34:37,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:34:37,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:34:37,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:34:37,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:34:37,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:34:37" (1/1) ... [2020-08-18 18:34:37,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d733b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:37, skipping insertion in model container [2020-08-18 18:34:37,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:34:37" (1/1) ... [2020-08-18 18:34:37,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:34:37,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:34:38,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:34:38,284 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:34:38,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:34:38,402 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:34:38,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38 WrapperNode [2020-08-18 18:34:38,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:34:38,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:34:38,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:34:38,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:34:38,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (1/1) ... [2020-08-18 18:34:38,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (1/1) ... [2020-08-18 18:34:38,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (1/1) ... [2020-08-18 18:34:38,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (1/1) ... [2020-08-18 18:34:38,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (1/1) ... [2020-08-18 18:34:38,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (1/1) ... [2020-08-18 18:34:38,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (1/1) ... [2020-08-18 18:34:38,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:34:38,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:34:38,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:34:38,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:34:38,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:34:38,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:34:38,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:34:38,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 18:34:38,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 18:34:38,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 18:34:38,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 18:34:38,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 18:34:38,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 18:34:38,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 18:34:38,563 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 18:34:38,563 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 18:34:38,564 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 18:34:38,564 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 18:34:38,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:34:38,564 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 18:34:38,564 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 18:34:38,565 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 18:34:38,565 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 18:34:38,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 18:34:38,565 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 18:34:38,565 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 18:34:38,565 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 18:34:38,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 18:34:38,566 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 18:34:38,566 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 18:34:38,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 18:34:38,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 18:34:38,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 18:34:38,567 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 18:34:38,567 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 18:34:38,567 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 18:34:38,567 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-18 18:34:38,567 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 18:34:38,567 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 18:34:38,568 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 18:34:38,568 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 18:34:38,568 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 18:34:38,568 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 18:34:38,568 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 18:34:38,568 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 18:34:38,568 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 18:34:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 18:34:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 18:34:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:34:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:34:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 18:34:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 18:34:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 18:34:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 18:34:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 18:34:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 18:34:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 18:34:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 18:34:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 18:34:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 18:34:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 18:34:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 18:34:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 18:34:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 18:34:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 18:34:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 18:34:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 18:34:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 18:34:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 18:34:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 18:34:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 18:34:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 18:34:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 18:34:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 18:34:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 18:34:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 18:34:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 18:34:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 18:34:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 18:34:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 18:34:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:34:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 18:34:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 18:34:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 18:34:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 18:34:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 18:34:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 18:34:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 18:34:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 18:34:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 18:34:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 18:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 18:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 18:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 18:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 18:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 18:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 18:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 18:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 18:34:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-18 18:34:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 18:34:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-18 18:34:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:34:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 18:34:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:34:39,730 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:34:39,731 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 18:34:39,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:34:39 BoogieIcfgContainer [2020-08-18 18:34:39,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:34:39,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:34:39,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:34:39,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:34:39,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:34:37" (1/3) ... [2020-08-18 18:34:39,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdf54f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:34:39, skipping insertion in model container [2020-08-18 18:34:39,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:34:38" (2/3) ... [2020-08-18 18:34:39,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdf54f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:34:39, skipping insertion in model container [2020-08-18 18:34:39,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:34:39" (3/3) ... [2020-08-18 18:34:39,745 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product63.cil.c [2020-08-18 18:34:39,756 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:34:39,764 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:34:39,779 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:34:39,807 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:34:39,807 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:34:39,807 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:34:39,807 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:34:39,808 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:34:39,808 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:34:39,808 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:34:39,808 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:34:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states. [2020-08-18 18:34:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 18:34:39,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:39,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:39,845 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1593418819, now seen corresponding path program 1 times [2020-08-18 18:34:39,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:39,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132089383] [2020-08-18 18:34:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:40,590 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:40,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:40,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:40,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:40,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:40,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:40,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:34:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:40,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 18:34:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:34:40,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132089383] [2020-08-18 18:34:40,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:40,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:34:40,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908467182] [2020-08-18 18:34:40,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:34:40,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:34:40,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:34:40,750 INFO L87 Difference]: Start difference. First operand 202 states. Second operand 3 states. [2020-08-18 18:34:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:42,079 INFO L93 Difference]: Finished difference Result 365 states and 474 transitions. [2020-08-18 18:34:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:34:42,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 18:34:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:42,097 INFO L225 Difference]: With dead ends: 365 [2020-08-18 18:34:42,097 INFO L226 Difference]: Without dead ends: 197 [2020-08-18 18:34:42,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:34:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-08-18 18:34:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2020-08-18 18:34:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-18 18:34:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2020-08-18 18:34:42,235 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 46 [2020-08-18 18:34:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:42,236 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2020-08-18 18:34:42,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:34:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2020-08-18 18:34:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 18:34:42,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:42,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:42,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:34:42,249 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash 261795935, now seen corresponding path program 1 times [2020-08-18 18:34:42,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:42,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833231505] [2020-08-18 18:34:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:42,629 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:42,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:42,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:42,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:42,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:42,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:42,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 18:34:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:42,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 18:34:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:34:42,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833231505] [2020-08-18 18:34:42,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:42,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:34:42,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572764051] [2020-08-18 18:34:42,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:34:42,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:42,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:34:42,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:34:42,730 INFO L87 Difference]: Start difference. First operand 159 states and 189 transitions. Second operand 4 states. [2020-08-18 18:34:43,181 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:44,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:44,364 INFO L93 Difference]: Finished difference Result 292 states and 357 transitions. [2020-08-18 18:34:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:34:44,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 18:34:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:44,369 INFO L225 Difference]: With dead ends: 292 [2020-08-18 18:34:44,369 INFO L226 Difference]: Without dead ends: 181 [2020-08-18 18:34:44,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:34:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-08-18 18:34:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2020-08-18 18:34:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-18 18:34:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2020-08-18 18:34:44,413 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 47 [2020-08-18 18:34:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:44,414 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2020-08-18 18:34:44,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:34:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2020-08-18 18:34:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 18:34:44,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:44,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:44,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:34:44,417 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1299589925, now seen corresponding path program 1 times [2020-08-18 18:34:44,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:44,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136652274] [2020-08-18 18:34:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,810 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:44,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:34:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 18:34:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:34:44,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136652274] [2020-08-18 18:34:44,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:44,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:34:44,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45213266] [2020-08-18 18:34:44,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:34:44,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:34:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:34:44,905 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand 8 states. [2020-08-18 18:34:45,231 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:45,579 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:45,824 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:46,062 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:46,818 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:49,173 INFO L93 Difference]: Finished difference Result 510 states and 633 transitions. [2020-08-18 18:34:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:34:49,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 18:34:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:49,180 INFO L225 Difference]: With dead ends: 510 [2020-08-18 18:34:49,180 INFO L226 Difference]: Without dead ends: 384 [2020-08-18 18:34:49,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:34:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-08-18 18:34:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-08-18 18:34:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-08-18 18:34:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 386 transitions. [2020-08-18 18:34:49,292 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 386 transitions. Word has length 51 [2020-08-18 18:34:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:49,293 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 386 transitions. [2020-08-18 18:34:49,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:34:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 386 transitions. [2020-08-18 18:34:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 18:34:49,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:49,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:49,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:34:49,296 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash -848411279, now seen corresponding path program 1 times [2020-08-18 18:34:49,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:49,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252995376] [2020-08-18 18:34:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,679 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:49,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 18:34:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 18:34:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 18:34:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:34:49,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252995376] [2020-08-18 18:34:49,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:49,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 18:34:49,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20006330] [2020-08-18 18:34:49,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:34:49,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:49,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:34:49,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:34:49,806 INFO L87 Difference]: Start difference. First operand 318 states and 386 transitions. Second operand 12 states. [2020-08-18 18:34:50,194 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:50,490 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:50,744 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:51,011 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:51,534 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:34:52,365 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:52,777 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:34:53,124 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:34:53,392 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:34:53,684 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:34:54,106 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:34:54,472 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 18:34:54,891 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:34:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:34:57,229 INFO L93 Difference]: Finished difference Result 1305 states and 1782 transitions. [2020-08-18 18:34:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 18:34:57,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-18 18:34:57,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:34:57,243 INFO L225 Difference]: With dead ends: 1305 [2020-08-18 18:34:57,243 INFO L226 Difference]: Without dead ends: 1011 [2020-08-18 18:34:57,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-18 18:34:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-08-18 18:34:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 910. [2020-08-18 18:34:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2020-08-18 18:34:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1164 transitions. [2020-08-18 18:34:57,550 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1164 transitions. Word has length 57 [2020-08-18 18:34:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:34:57,552 INFO L479 AbstractCegarLoop]: Abstraction has 910 states and 1164 transitions. [2020-08-18 18:34:57,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:34:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1164 transitions. [2020-08-18 18:34:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 18:34:57,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:34:57,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:34:57,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:34:57,558 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:34:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:34:57,559 INFO L82 PathProgramCache]: Analyzing trace with hash -533846889, now seen corresponding path program 1 times [2020-08-18 18:34:57,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:34:57,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682794948] [2020-08-18 18:34:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:34:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,849 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:34:57,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:34:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:34:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:34:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:34:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:34:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 18:34:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:34:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 18:34:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 18:34:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:34:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:34:57,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682794948] [2020-08-18 18:34:57,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:34:57,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:34:57,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743104458] [2020-08-18 18:34:57,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:34:57,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:34:57,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:34:57,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:34:57,947 INFO L87 Difference]: Start difference. First operand 910 states and 1164 transitions. Second operand 6 states. [2020-08-18 18:34:58,217 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:35:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:00,502 INFO L93 Difference]: Finished difference Result 2165 states and 2945 transitions. [2020-08-18 18:35:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:35:00,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 18:35:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:00,513 INFO L225 Difference]: With dead ends: 2165 [2020-08-18 18:35:00,513 INFO L226 Difference]: Without dead ends: 1279 [2020-08-18 18:35:00,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:35:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2020-08-18 18:35:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1192. [2020-08-18 18:35:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-08-18 18:35:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1486 transitions. [2020-08-18 18:35:00,769 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1486 transitions. Word has length 61 [2020-08-18 18:35:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:00,769 INFO L479 AbstractCegarLoop]: Abstraction has 1192 states and 1486 transitions. [2020-08-18 18:35:00,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:35:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1486 transitions. [2020-08-18 18:35:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 18:35:00,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:35:00,773 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:35:00,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:35:00,773 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:35:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:35:00,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2051159117, now seen corresponding path program 1 times [2020-08-18 18:35:00,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:35:00,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101489242] [2020-08-18 18:35:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:35:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,063 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:35:01,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:35:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:35:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:35:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:35:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:35:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:35:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:35:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 18:35:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 18:35:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 18:35:01,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101489242] [2020-08-18 18:35:01,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:35:01,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:35:01,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026347642] [2020-08-18 18:35:01,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:35:01,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:35:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:35:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:35:01,276 INFO L87 Difference]: Start difference. First operand 1192 states and 1486 transitions. Second operand 10 states. [2020-08-18 18:35:01,832 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-18 18:35:02,393 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:35:04,602 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:35:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:07,004 INFO L93 Difference]: Finished difference Result 2279 states and 2961 transitions. [2020-08-18 18:35:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 18:35:07,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-08-18 18:35:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:07,016 INFO L225 Difference]: With dead ends: 2279 [2020-08-18 18:35:07,016 INFO L226 Difference]: Without dead ends: 1402 [2020-08-18 18:35:07,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-18 18:35:07,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2020-08-18 18:35:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1305. [2020-08-18 18:35:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2020-08-18 18:35:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1607 transitions. [2020-08-18 18:35:07,251 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1607 transitions. Word has length 88 [2020-08-18 18:35:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:07,251 INFO L479 AbstractCegarLoop]: Abstraction has 1305 states and 1607 transitions. [2020-08-18 18:35:07,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:35:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1607 transitions. [2020-08-18 18:35:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 18:35:07,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:35:07,256 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:35:07,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:35:07,257 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:35:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:35:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -923959180, now seen corresponding path program 1 times [2020-08-18 18:35:07,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:35:07,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901066173] [2020-08-18 18:35:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:35:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,505 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:35:07,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:35:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:35:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:35:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:35:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:35:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:35:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 18:35:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 18:35:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:35:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 18:35:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-18 18:35:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 18:35:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 18:35:07,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901066173] [2020-08-18 18:35:07,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:35:07,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:35:07,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563521689] [2020-08-18 18:35:07,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:35:07,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:35:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:35:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:35:07,754 INFO L87 Difference]: Start difference. First operand 1305 states and 1607 transitions. Second operand 9 states. [2020-08-18 18:35:08,605 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:08,817 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:09,068 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:10,392 INFO L93 Difference]: Finished difference Result 2395 states and 3094 transitions. [2020-08-18 18:35:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:35:10,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 150 [2020-08-18 18:35:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:10,403 INFO L225 Difference]: With dead ends: 2395 [2020-08-18 18:35:10,403 INFO L226 Difference]: Without dead ends: 1428 [2020-08-18 18:35:10,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:35:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2020-08-18 18:35:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1305. [2020-08-18 18:35:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2020-08-18 18:35:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1605 transitions. [2020-08-18 18:35:10,633 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1605 transitions. Word has length 150 [2020-08-18 18:35:10,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:10,634 INFO L479 AbstractCegarLoop]: Abstraction has 1305 states and 1605 transitions. [2020-08-18 18:35:10,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:35:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1605 transitions. [2020-08-18 18:35:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 18:35:10,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:35:10,639 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:35:10,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:35:10,639 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:35:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:35:10,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1752033202, now seen corresponding path program 1 times [2020-08-18 18:35:10,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:35:10,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102286259] [2020-08-18 18:35:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:35:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:10,928 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:35:10,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:35:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:10,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:10,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:35:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:10,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:10,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:35:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:10,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:35:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:10,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:35:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:35:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 18:35:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 18:35:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:35:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 18:35:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-18 18:35:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 18:35:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-18 18:35:11,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102286259] [2020-08-18 18:35:11,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:35:11,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 18:35:11,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319306969] [2020-08-18 18:35:11,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 18:35:11,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:35:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 18:35:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:35:11,238 INFO L87 Difference]: Start difference. First operand 1305 states and 1605 transitions. Second operand 15 states. [2020-08-18 18:35:11,609 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:35:12,314 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:13,666 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:14,044 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:14,340 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:14,660 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:35:14,995 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:35:15,266 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:35:15,809 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-18 18:35:16,278 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-18 18:35:17,102 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:17,326 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:17,584 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:35:17,817 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 18:35:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:18,774 INFO L93 Difference]: Finished difference Result 3652 states and 4736 transitions. [2020-08-18 18:35:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 18:35:18,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-08-18 18:35:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:18,794 INFO L225 Difference]: With dead ends: 3652 [2020-08-18 18:35:18,794 INFO L226 Difference]: Without dead ends: 2371 [2020-08-18 18:35:18,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 18:35:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2020-08-18 18:35:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2171. [2020-08-18 18:35:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2171 states. [2020-08-18 18:35:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 2620 transitions. [2020-08-18 18:35:19,321 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 2620 transitions. Word has length 150 [2020-08-18 18:35:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:19,322 INFO L479 AbstractCegarLoop]: Abstraction has 2171 states and 2620 transitions. [2020-08-18 18:35:19,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 18:35:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 2620 transitions. [2020-08-18 18:35:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-18 18:35:19,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:35:19,333 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:35:19,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:35:19,333 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:35:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:35:19,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1447990305, now seen corresponding path program 1 times [2020-08-18 18:35:19,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:35:19,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286675588] [2020-08-18 18:35:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:35:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,625 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:35:19,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:35:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:35:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:35:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:35:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:35:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 18:35:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 18:35:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 18:35:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:35:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 18:35:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-18 18:35:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 18:35:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 18:35:19,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286675588] [2020-08-18 18:35:19,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:35:19,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:35:19,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699677297] [2020-08-18 18:35:19,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:35:19,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:35:19,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:35:19,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:35:19,869 INFO L87 Difference]: Start difference. First operand 2171 states and 2620 transitions. Second operand 11 states. [2020-08-18 18:35:20,986 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:21,257 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 18:35:21,533 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:21,804 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:23,441 INFO L93 Difference]: Finished difference Result 4828 states and 6299 transitions. [2020-08-18 18:35:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:35:23,442 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 150 [2020-08-18 18:35:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:23,460 INFO L225 Difference]: With dead ends: 4828 [2020-08-18 18:35:23,461 INFO L226 Difference]: Without dead ends: 2681 [2020-08-18 18:35:23,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:35:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2020-08-18 18:35:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2211. [2020-08-18 18:35:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2020-08-18 18:35:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 2664 transitions. [2020-08-18 18:35:23,902 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 2664 transitions. Word has length 150 [2020-08-18 18:35:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:23,904 INFO L479 AbstractCegarLoop]: Abstraction has 2211 states and 2664 transitions. [2020-08-18 18:35:23,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:35:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 2664 transitions. [2020-08-18 18:35:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 18:35:23,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:35:23,911 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 18:35:23,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:35:23,911 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:35:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:35:23,912 INFO L82 PathProgramCache]: Analyzing trace with hash -547203946, now seen corresponding path program 1 times [2020-08-18 18:35:23,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:35:23,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290015145] [2020-08-18 18:35:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:35:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,372 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:35:24,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:35:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:35:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:35:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:35:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:35:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:35:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 18:35:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 18:35:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 18:35:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 18:35:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 18:35:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2020-08-18 18:35:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-18 18:35:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-18 18:35:24,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290015145] [2020-08-18 18:35:24,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:35:24,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:35:24,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548163921] [2020-08-18 18:35:24,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:35:24,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:35:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:35:24,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:35:24,621 INFO L87 Difference]: Start difference. First operand 2211 states and 2664 transitions. Second operand 11 states. [2020-08-18 18:35:25,166 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:35:27,550 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:27,837 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:28,091 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 18:35:28,518 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 18:35:28,796 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:29,639 INFO L93 Difference]: Finished difference Result 2688 states and 3522 transitions. [2020-08-18 18:35:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 18:35:29,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2020-08-18 18:35:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:29,655 INFO L225 Difference]: With dead ends: 2688 [2020-08-18 18:35:29,656 INFO L226 Difference]: Without dead ends: 2685 [2020-08-18 18:35:29,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2020-08-18 18:35:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-08-18 18:35:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2211. [2020-08-18 18:35:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2020-08-18 18:35:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 2654 transitions. [2020-08-18 18:35:30,059 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 2654 transitions. Word has length 154 [2020-08-18 18:35:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:30,060 INFO L479 AbstractCegarLoop]: Abstraction has 2211 states and 2654 transitions. [2020-08-18 18:35:30,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:35:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 2654 transitions. [2020-08-18 18:35:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-18 18:35:30,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:35:30,069 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:35:30,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:35:30,069 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:35:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:35:30,070 INFO L82 PathProgramCache]: Analyzing trace with hash 198178896, now seen corresponding path program 1 times [2020-08-18 18:35:30,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:35:30,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627241741] [2020-08-18 18:35:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:35:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,314 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:35:30,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:35:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:35:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:35:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:35:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:35:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 18:35:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 18:35:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 18:35:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 18:35:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:35:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-18 18:35:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 18:35:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:35:30,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627241741] [2020-08-18 18:35:30,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:35:30,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:35:30,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573724768] [2020-08-18 18:35:30,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:35:30,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:35:30,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:35:30,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:35:30,635 INFO L87 Difference]: Start difference. First operand 2211 states and 2654 transitions. Second operand 12 states. [2020-08-18 18:35:31,071 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:31,311 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:31,546 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:32,256 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:32,507 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:32,752 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 18:35:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:35:34,018 INFO L93 Difference]: Finished difference Result 4129 states and 5110 transitions. [2020-08-18 18:35:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:35:34,019 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 168 [2020-08-18 18:35:34,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:35:34,029 INFO L225 Difference]: With dead ends: 4129 [2020-08-18 18:35:34,030 INFO L226 Difference]: Without dead ends: 1942 [2020-08-18 18:35:34,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:35:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2020-08-18 18:35:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1843. [2020-08-18 18:35:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1843 states. [2020-08-18 18:35:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2174 transitions. [2020-08-18 18:35:34,309 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2174 transitions. Word has length 168 [2020-08-18 18:35:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:35:34,309 INFO L479 AbstractCegarLoop]: Abstraction has 1843 states and 2174 transitions. [2020-08-18 18:35:34,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:35:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2174 transitions. [2020-08-18 18:35:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-08-18 18:35:34,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:35:34,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:35:34,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:35:34,317 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:35:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:35:34,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1229554551, now seen corresponding path program 1 times [2020-08-18 18:35:34,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:35:34,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31137136] [2020-08-18 18:35:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:35:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,610 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 18:35:34,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:35:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:35:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:35:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 18:35:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:35:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:35:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:35:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:35:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 18:35:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 18:35:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:35:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 18:35:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:35:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:35:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:35:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 18:35:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-18 18:35:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:35:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 18:35:34,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31137136] [2020-08-18 18:35:34,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:35:34,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:35:34,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630169512] [2020-08-18 18:35:34,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:35:34,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:35:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:35:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:35:34,832 INFO L87 Difference]: Start difference. First operand 1843 states and 2174 transitions. Second operand 12 states. [2020-08-18 18:35:35,167 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 187