/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:59:53,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:59:53,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:59:53,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:59:53,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:59:53,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:59:53,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:59:53,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:59:53,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:59:53,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:59:53,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:59:53,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:59:53,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:59:53,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:59:53,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:59:53,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:59:53,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:59:53,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:59:53,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:59:53,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:59:53,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:59:53,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:59:53,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:59:53,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:59:53,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:59:53,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:59:53,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:59:53,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:59:53,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:59:53,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:59:53,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:59:53,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:59:53,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:59:53,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:59:53,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:59:53,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:59:53,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:59:53,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:59:53,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:59:53,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:59:53,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:59:53,449 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 [2020-08-21 13:59:53,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:59:53,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:59:53,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:59:53,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:59:53,488 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:59:53,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:59:53,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:59:53,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:59:53,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:59:53,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:59:53,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:59:53,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:59:53,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:59:53,491 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:59:53,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:59:53,491 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:59:53,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:59:53,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:59:53,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:59:53,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:59:53,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:59:53,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:59:53,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:59:53,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:59:53,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:59:53,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:59:53,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:59:53,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:59:53,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:59:53,494 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 -> log-additional-information=true; [2020-08-21 13:59:53,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:59:53,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:59:53,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:59:53,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:59:53,831 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:59:53,832 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c [2020-08-21 13:59:53,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10d29abcd/5eab2384b15a401f9bd84edfca9c6c96/FLAGc3b49ab13 [2020-08-21 13:59:54,469 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:59:54,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product48.cil.c [2020-08-21 13:59:54,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10d29abcd/5eab2384b15a401f9bd84edfca9c6c96/FLAGc3b49ab13 [2020-08-21 13:59:54,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10d29abcd/5eab2384b15a401f9bd84edfca9c6c96 [2020-08-21 13:59:54,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:59:54,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:59:54,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:59:54,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:59:54,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:59:54,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:59:54" (1/1) ... [2020-08-21 13:59:54,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20abf48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:54, skipping insertion in model container [2020-08-21 13:59:54,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:59:54" (1/1) ... [2020-08-21 13:59:54,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:59:54,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:59:55,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:59:55,247 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:59:55,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:59:55,387 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:59:55,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55 WrapperNode [2020-08-21 13:59:55,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:59:55,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:59:55,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:59:55,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:59:55,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (1/1) ... [2020-08-21 13:59:55,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (1/1) ... [2020-08-21 13:59:55,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (1/1) ... [2020-08-21 13:59:55,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (1/1) ... [2020-08-21 13:59:55,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (1/1) ... [2020-08-21 13:59:55,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (1/1) ... [2020-08-21 13:59:55,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (1/1) ... [2020-08-21 13:59:55,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:59:55,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:59:55,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:59:55,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:59:55,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (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 [2020-08-21 13:59:55,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:59:55,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:59:55,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 13:59:55,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 13:59:55,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 13:59:55,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 13:59:55,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 13:59:55,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 13:59:55,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 13:59:55,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 13:59:55,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 13:59:55,563 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 13:59:55,563 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 13:59:55,563 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 13:59:55,563 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 13:59:55,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:59:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 13:59:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 13:59:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 13:59:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 13:59:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-21 13:59:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 13:59:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 13:59:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 13:59:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 13:59:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 13:59:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 13:59:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 13:59:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 13:59:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 13:59:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 13:59:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 13:59:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 13:59:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 13:59:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 13:59:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 13:59:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 13:59:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 13:59:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 13:59:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 13:59:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 13:59:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:59:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:59:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 13:59:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 13:59:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 13:59:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 13:59:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 13:59:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 13:59:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 13:59:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 13:59:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 13:59:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 13:59:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 13:59:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 13:59:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 13:59:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 13:59:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:59:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 13:59:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 13:59:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 13:59:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 13:59:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 13:59:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:59:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 13:59:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 13:59:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 13:59:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 13:59:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 13:59:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 13:59:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 13:59:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 13:59:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 13:59:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 13:59:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 13:59:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 13:59:55,573 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 13:59:55,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:59:55,573 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 13:59:55,573 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 13:59:55,573 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 13:59:55,573 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 13:59:55,574 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 13:59:55,574 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 13:59:55,574 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 13:59:55,574 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 13:59:55,574 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 13:59:55,574 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 13:59:55,574 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 13:59:55,575 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 13:59:55,575 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 13:59:55,575 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-21 13:59:55,575 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 13:59:55,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:59:55,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 13:59:55,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:59:56,675 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:59:56,675 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 13:59:56,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:59:56 BoogieIcfgContainer [2020-08-21 13:59:56,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:59:56,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:59:56,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:59:56,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:59:56,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:59:54" (1/3) ... [2020-08-21 13:59:56,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d05a160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:59:56, skipping insertion in model container [2020-08-21 13:59:56,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:59:55" (2/3) ... [2020-08-21 13:59:56,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d05a160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:59:56, skipping insertion in model container [2020-08-21 13:59:56,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:59:56" (3/3) ... [2020-08-21 13:59:56,690 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product48.cil.c [2020-08-21 13:59:56,700 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:59:56,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:59:56,723 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:59:56,747 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:59:56,747 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:59:56,748 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:59:56,748 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:59:56,748 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:59:56,748 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:59:56,748 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:59:56,749 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:59:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-08-21 13:59:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 13:59:56,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:59:56,784 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] [2020-08-21 13:59:56,785 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:59:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:59:56,792 INFO L82 PathProgramCache]: Analyzing trace with hash 267821041, now seen corresponding path program 1 times [2020-08-21 13:59:56,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:59:56,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034129898] [2020-08-21 13:59:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:59:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:57,505 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 13:59:57,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:59:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:57,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:59:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:57,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:59:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:57,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:59:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:57,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:59:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:57,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 13:59:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:57,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 13:59:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:59:57,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034129898] [2020-08-21 13:59:57,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:59:57,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:59:57,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630942386] [2020-08-21 13:59:57,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:59:57,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:59:57,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:59:57,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:59:57,694 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 3 states. [2020-08-21 13:59:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:59:58,994 INFO L93 Difference]: Finished difference Result 332 states and 431 transitions. [2020-08-21 13:59:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:59:58,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 13:59:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:59:59,020 INFO L225 Difference]: With dead ends: 332 [2020-08-21 13:59:59,021 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 13:59:59,029 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 [2020-08-21 13:59:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 13:59:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 143. [2020-08-21 13:59:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-21 13:59:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-08-21 13:59:59,190 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 46 [2020-08-21 13:59:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:59:59,191 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-08-21 13:59:59,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:59:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-08-21 13:59:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 13:59:59,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:59:59,203 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] [2020-08-21 13:59:59,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:59:59,204 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:59:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:59:59,204 INFO L82 PathProgramCache]: Analyzing trace with hash -395653053, now seen corresponding path program 1 times [2020-08-21 13:59:59,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:59:59,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352595212] [2020-08-21 13:59:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:59:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:59,556 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 13:59:59,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:59:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:59,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:59:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:59,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:59:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:59,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:59:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:59,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:59:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:59,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:59:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:59,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 13:59:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:59:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:59:59,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352595212] [2020-08-21 13:59:59,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:59:59,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:59:59,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873553130] [2020-08-21 13:59:59,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:59:59,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:59:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:59:59,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:59:59,630 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 4 states. [2020-08-21 14:00:00,036 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:00,982 INFO L93 Difference]: Finished difference Result 255 states and 310 transitions. [2020-08-21 14:00:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:00:00,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 14:00:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:00,985 INFO L225 Difference]: With dead ends: 255 [2020-08-21 14:00:00,986 INFO L226 Difference]: Without dead ends: 164 [2020-08-21 14:00:00,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:00:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-08-21 14:00:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-08-21 14:00:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 14:00:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2020-08-21 14:00:01,029 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 47 [2020-08-21 14:00:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:01,029 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2020-08-21 14:00:01,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:00:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2020-08-21 14:00:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 14:00:01,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:01,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:00:01,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:00:01,032 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:01,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1814461049, now seen corresponding path program 1 times [2020-08-21 14:00:01,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:01,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763518517] [2020-08-21 14:00:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:01,392 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:01,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:01,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:01,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:01,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:01,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:01,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:00:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:01,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 14:00:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:00:01,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763518517] [2020-08-21 14:00:01,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:00:01,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:00:01,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823291033] [2020-08-21 14:00:01,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:00:01,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:00:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:00:01,492 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand 5 states. [2020-08-21 14:00:01,801 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:02,536 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:04,165 INFO L93 Difference]: Finished difference Result 459 states and 568 transitions. [2020-08-21 14:00:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:00:04,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-21 14:00:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:04,175 INFO L225 Difference]: With dead ends: 459 [2020-08-21 14:00:04,175 INFO L226 Difference]: Without dead ends: 349 [2020-08-21 14:00:04,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:00:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-21 14:00:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 282. [2020-08-21 14:00:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-21 14:00:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 340 transitions. [2020-08-21 14:00:04,261 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 340 transitions. Word has length 52 [2020-08-21 14:00:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:04,261 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 340 transitions. [2020-08-21 14:00:04,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:00:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 340 transitions. [2020-08-21 14:00:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:00:04,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:04,264 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] [2020-08-21 14:00:04,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:00:04,264 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:04,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1060505325, now seen corresponding path program 1 times [2020-08-21 14:00:04,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:04,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238353733] [2020-08-21 14:00:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,647 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:04,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:00:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:00:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:00:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:00:04,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238353733] [2020-08-21 14:00:04,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:00:04,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 14:00:04,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024862770] [2020-08-21 14:00:04,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:00:04,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:04,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:00:04,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:00:04,755 INFO L87 Difference]: Start difference. First operand 282 states and 340 transitions. Second operand 12 states. [2020-08-21 14:00:05,146 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:05,465 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:05,708 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:05,986 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:06,556 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:07,418 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:07,810 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:00:08,121 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:00:08,417 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:08,764 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:09,205 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:00:09,533 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 14:00:09,801 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:11,900 INFO L93 Difference]: Finished difference Result 1153 states and 1576 transitions. [2020-08-21 14:00:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 14:00:11,906 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 14:00:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:11,921 INFO L225 Difference]: With dead ends: 1153 [2020-08-21 14:00:11,922 INFO L226 Difference]: Without dead ends: 895 [2020-08-21 14:00:11,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:00:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-08-21 14:00:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 794. [2020-08-21 14:00:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-21 14:00:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1006 transitions. [2020-08-21 14:00:12,153 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1006 transitions. Word has length 57 [2020-08-21 14:00:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:12,154 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1006 transitions. [2020-08-21 14:00:12,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:00:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1006 transitions. [2020-08-21 14:00:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:00:12,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:12,157 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] [2020-08-21 14:00:12,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:00:12,158 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1254258393, now seen corresponding path program 1 times [2020-08-21 14:00:12,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:12,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727567317] [2020-08-21 14:00:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,439 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:12,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:00:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:00:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 14:00:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 14:00:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:00:12,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727567317] [2020-08-21 14:00:12,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:00:12,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:00:12,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799368747] [2020-08-21 14:00:12,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:00:12,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:00:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:00:12,520 INFO L87 Difference]: Start difference. First operand 794 states and 1006 transitions. Second operand 6 states. [2020-08-21 14:00:12,822 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:14,796 INFO L93 Difference]: Finished difference Result 1951 states and 2621 transitions. [2020-08-21 14:00:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:00:14,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 14:00:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:14,807 INFO L225 Difference]: With dead ends: 1951 [2020-08-21 14:00:14,807 INFO L226 Difference]: Without dead ends: 1181 [2020-08-21 14:00:14,812 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 [2020-08-21 14:00:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2020-08-21 14:00:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1090. [2020-08-21 14:00:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-08-21 14:00:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1352 transitions. [2020-08-21 14:00:15,095 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1352 transitions. Word has length 61 [2020-08-21 14:00:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:15,096 INFO L479 AbstractCegarLoop]: Abstraction has 1090 states and 1352 transitions. [2020-08-21 14:00:15,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:00:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1352 transitions. [2020-08-21 14:00:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 14:00:15,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:15,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:00:15,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:00:15,100 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash 909865268, now seen corresponding path program 1 times [2020-08-21 14:00:15,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:15,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966307919] [2020-08-21 14:00:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,390 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:15,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 14:00:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:00:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 14:00:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:00:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 14:00:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 14:00:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 14:00:15,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966307919] [2020-08-21 14:00:15,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:00:15,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:00:15,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425240290] [2020-08-21 14:00:15,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:00:15,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:00:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:00:15,610 INFO L87 Difference]: Start difference. First operand 1090 states and 1352 transitions. Second operand 10 states. [2020-08-21 14:00:16,217 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 14:00:16,825 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:19,021 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:21,027 INFO L93 Difference]: Finished difference Result 2091 states and 2705 transitions. [2020-08-21 14:00:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 14:00:21,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-21 14:00:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:21,041 INFO L225 Difference]: With dead ends: 2091 [2020-08-21 14:00:21,042 INFO L226 Difference]: Without dead ends: 1310 [2020-08-21 14:00:21,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:00:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2020-08-21 14:00:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1197. [2020-08-21 14:00:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-08-21 14:00:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1463 transitions. [2020-08-21 14:00:21,437 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1463 transitions. Word has length 89 [2020-08-21 14:00:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:21,440 INFO L479 AbstractCegarLoop]: Abstraction has 1197 states and 1463 transitions. [2020-08-21 14:00:21,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:00:21,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1463 transitions. [2020-08-21 14:00:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 14:00:21,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:21,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:00:21,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:00:21,450 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:21,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:21,451 INFO L82 PathProgramCache]: Analyzing trace with hash -920784732, now seen corresponding path program 1 times [2020-08-21 14:00:21,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:21,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466117659] [2020-08-21 14:00:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,729 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:21,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:00:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:00:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 14:00:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 14:00:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 14:00:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 14:00:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 14:00:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 14:00:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 14:00:21,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466117659] [2020-08-21 14:00:21,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:00:21,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:00:21,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453485043] [2020-08-21 14:00:21,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:00:22,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:22,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:00:22,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:00:22,004 INFO L87 Difference]: Start difference. First operand 1197 states and 1463 transitions. Second operand 10 states. [2020-08-21 14:00:23,172 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:23,421 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:23,685 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:23,934 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:25,099 INFO L93 Difference]: Finished difference Result 2526 states and 3300 transitions. [2020-08-21 14:00:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:00:25,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 143 [2020-08-21 14:00:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:25,114 INFO L225 Difference]: With dead ends: 2526 [2020-08-21 14:00:25,115 INFO L226 Difference]: Without dead ends: 1353 [2020-08-21 14:00:25,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:00:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2020-08-21 14:00:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1227. [2020-08-21 14:00:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-21 14:00:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1497 transitions. [2020-08-21 14:00:25,421 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1497 transitions. Word has length 143 [2020-08-21 14:00:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:25,422 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1497 transitions. [2020-08-21 14:00:25,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:00:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1497 transitions. [2020-08-21 14:00:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 14:00:25,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:25,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:00:25,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:00:25,430 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:25,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1804293722, now seen corresponding path program 1 times [2020-08-21 14:00:25,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:25,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077971308] [2020-08-21 14:00:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,741 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:25,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:00:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:00:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 14:00:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 14:00:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 14:00:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 14:00:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 14:00:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-21 14:00:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 14:00:25,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077971308] [2020-08-21 14:00:25,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:00:25,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:00:25,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716766951] [2020-08-21 14:00:25,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:00:25,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:25,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:00:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:00:25,937 INFO L87 Difference]: Start difference. First operand 1227 states and 1497 transitions. Second operand 12 states. [2020-08-21 14:00:26,506 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:26,797 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:27,116 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:27,855 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:28,105 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:28,346 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:29,365 INFO L93 Difference]: Finished difference Result 2251 states and 2835 transitions. [2020-08-21 14:00:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:00:29,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-21 14:00:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:29,372 INFO L225 Difference]: With dead ends: 2251 [2020-08-21 14:00:29,373 INFO L226 Difference]: Without dead ends: 1048 [2020-08-21 14:00:29,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:00:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-08-21 14:00:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 990. [2020-08-21 14:00:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-08-21 14:00:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1192 transitions. [2020-08-21 14:00:29,588 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1192 transitions. Word has length 143 [2020-08-21 14:00:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:29,589 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1192 transitions. [2020-08-21 14:00:29,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:00:29,590 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1192 transitions. [2020-08-21 14:00:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 14:00:29,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:29,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:00:29,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:00:29,595 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash -401491891, now seen corresponding path program 1 times [2020-08-21 14:00:29,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:29,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879171539] [2020-08-21 14:00:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,913 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:29,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 14:00:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:00:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:29,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:00:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 14:00:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-21 14:00:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-21 14:00:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 14:00:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-21 14:00:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-21 14:00:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-21 14:00:30,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879171539] [2020-08-21 14:00:30,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:00:30,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 14:00:30,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770912565] [2020-08-21 14:00:30,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 14:00:30,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:30,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 14:00:30,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:00:30,205 INFO L87 Difference]: Start difference. First operand 990 states and 1192 transitions. Second operand 15 states. [2020-08-21 14:00:30,861 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:31,671 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:33,170 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:33,497 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:33,745 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:33,981 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:34,264 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:34,511 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:35,027 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-21 14:00:35,511 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-21 14:00:36,300 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:36,549 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:36,816 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:37,049 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:37,852 INFO L93 Difference]: Finished difference Result 2788 states and 3494 transitions. [2020-08-21 14:00:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 14:00:37,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2020-08-21 14:00:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:37,863 INFO L225 Difference]: With dead ends: 2788 [2020-08-21 14:00:37,864 INFO L226 Difference]: Without dead ends: 1822 [2020-08-21 14:00:37,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 14:00:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2020-08-21 14:00:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1717. [2020-08-21 14:00:38,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2020-08-21 14:00:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2029 transitions. [2020-08-21 14:00:38,252 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2029 transitions. Word has length 147 [2020-08-21 14:00:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:38,253 INFO L479 AbstractCegarLoop]: Abstraction has 1717 states and 2029 transitions. [2020-08-21 14:00:38,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 14:00:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2029 transitions. [2020-08-21 14:00:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 14:00:38,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:38,258 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, 1] [2020-08-21 14:00:38,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:00:38,259 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash 628739049, now seen corresponding path program 1 times [2020-08-21 14:00:38,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:38,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977972670] [2020-08-21 14:00:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,546 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:38,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 14:00:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:00:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:00:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 14:00:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 14:00:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 14:00:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-21 14:00:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 14:00:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 14:00:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-21 14:00:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 14:00:38,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977972670] [2020-08-21 14:00:38,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:00:38,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:00:38,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747831864] [2020-08-21 14:00:38,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:00:38,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:00:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:00:38,796 INFO L87 Difference]: Start difference. First operand 1717 states and 2029 transitions. Second operand 11 states. [2020-08-21 14:00:39,183 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:41,312 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:41,550 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:41,812 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:42,084 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:42,348 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:00:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:42,956 INFO L93 Difference]: Finished difference Result 2048 states and 2598 transitions. [2020-08-21 14:00:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 14:00:42,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-08-21 14:00:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:42,969 INFO L225 Difference]: With dead ends: 2048 [2020-08-21 14:00:42,970 INFO L226 Difference]: Without dead ends: 2045 [2020-08-21 14:00:42,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:00:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-08-21 14:00:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1717. [2020-08-21 14:00:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2020-08-21 14:00:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2019 transitions. [2020-08-21 14:00:43,388 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2019 transitions. Word has length 151 [2020-08-21 14:00:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:43,389 INFO L479 AbstractCegarLoop]: Abstraction has 1717 states and 2019 transitions. [2020-08-21 14:00:43,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:00:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2019 transitions. [2020-08-21 14:00:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 14:00:43,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:43,394 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:00:43,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:00:43,395 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash -220870584, now seen corresponding path program 1 times [2020-08-21 14:00:43,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:43,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386400559] [2020-08-21 14:00:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,729 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:00:43,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:00:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:00:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:00:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:00:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 14:00:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:00:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:00:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:00:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 14:00:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-21 14:00:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-21 14:00:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:00:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 14:00:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:00:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 14:00:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-21 14:00:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:00:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 14:00:43,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386400559] [2020-08-21 14:00:43,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:00:43,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:00:43,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411691348] [2020-08-21 14:00:43,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:00:43,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:00:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:00:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:00:43,963 INFO L87 Difference]: Start difference. First operand 1717 states and 2019 transitions. Second operand 12 states. [2020-08-21 14:00:44,327 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:44,907 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:45,459 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:45,743 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:46,059 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:46,336 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:00:46,632 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:46,885 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:00:48,858 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:00:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:00:49,613 INFO L93 Difference]: Finished difference Result 4124 states and 5229 transitions. [2020-08-21 14:00:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 14:00:49,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-08-21 14:00:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:00:49,632 INFO L225 Difference]: With dead ends: 4124 [2020-08-21 14:00:49,633 INFO L226 Difference]: Without dead ends: 2749 [2020-08-21 14:00:49,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-08-21 14:00:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2020-08-21 14:00:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2293. [2020-08-21 14:00:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2293 states. [2020-08-21 14:00:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 2743 transitions. [2020-08-21 14:00:50,203 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 2743 transitions. Word has length 151 [2020-08-21 14:00:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:00:50,207 INFO L479 AbstractCegarLoop]: Abstraction has 2293 states and 2743 transitions. [2020-08-21 14:00:50,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:00:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 2743 transitions. [2020-08-21 14:00:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-08-21 14:00:50,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:00:50,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:00:50,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:00:50,219 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:00:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:00:50,220 INFO L82 PathProgramCache]: Analyzing trace with hash 402231489, now seen corresponding path program 2 times [2020-08-21 14:00:50,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:00:50,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500825489] [2020-08-21 14:00:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:00:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:00:50,323 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:00:50,323 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:00:50,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:00:50,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:00:50 BoogieIcfgContainer [2020-08-21 14:00:50,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:00:50,386 INFO L168 Benchmark]: Toolchain (without parser) took 55631.86 ms. Allocated memory was 138.9 MB in the beginning and 903.9 MB in the end (delta: 764.9 MB). Free memory was 100.2 MB in the beginning and 203.2 MB in the end (delta: -103.0 MB). Peak memory consumption was 661.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:00:50,387 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:00:50,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 633.12 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.0 MB in the beginning and 166.5 MB in the end (delta: -66.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:00:50,389 INFO L168 Benchmark]: Boogie Preprocessor took 101.81 ms. Allocated memory is still 201.9 MB. Free memory was 166.5 MB in the beginning and 162.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:00:50,392 INFO L168 Benchmark]: RCFGBuilder took 1190.49 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 162.4 MB in the beginning and 190.1 MB in the end (delta: -27.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:00:50,396 INFO L168 Benchmark]: TraceAbstraction took 53701.36 ms. Allocated memory was 233.8 MB in the beginning and 903.9 MB in the end (delta: 670.0 MB). Free memory was 190.1 MB in the beginning and 203.2 MB in the end (delta: -13.2 MB). Peak memory consumption was 656.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:00:50,400 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 633.12 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.0 MB in the beginning and 166.5 MB in the end (delta: -66.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.81 ms. Allocated memory is still 201.9 MB. Free memory was 166.5 MB in the beginning and 162.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1190.49 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 162.4 MB in the beginning and 190.1 MB in the end (delta: -27.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 53701.36 ms. Allocated memory was 233.8 MB in the beginning and 903.9 MB in the end (delta: 670.0 MB). Free memory was 190.1 MB in the beginning and 203.2 MB in the end (delta: -13.2 MB). Peak memory consumption was 656.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 439]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L238] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L444] int cleanupTimeShifts = 4; [L556] int pumpRunning = 0; [L557] int systemActive = 1; [L774] int waterLevel = 1; [L775] int methaneLevelCritical = 0; [L525] int retValue_acc ; [L526] int tmp ; [L530] FCALL select_helpers() [L531] FCALL select_features() [L532] CALL, EXPR valid_product() [L963] int retValue_acc ; [L966] retValue_acc = 1 [L967] return (retValue_acc); [L532] RET, EXPR valid_product() [L532] tmp = valid_product() [L534] COND TRUE \read(tmp) [L536] FCALL setup() [L537] CALL runTest() [L516] CALL test() [L869] int splverifierCounter ; [L870] int tmp ; [L871] int tmp___0 ; [L872] int tmp___1 ; [L873] int tmp___2 ; [L876] splverifierCounter = 0 [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND TRUE \read(tmp) [L890] CALL waterRise() [L792] COND TRUE waterLevel < 2 [L793] waterLevel = waterLevel + 1 [L890] RET waterRise() [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND FALSE !(\read(pumpRunning)) [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND FALSE !(\read(pumpRunning)) [L636] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND TRUE ! pumpRunning [L597] CALL, EXPR isHighWaterLevel() [L732] int retValue_acc ; [L733] int tmp ; [L734] int tmp___0 ; [L738] CALL, EXPR isHighWaterSensorDry() [L854] int retValue_acc ; [L857] COND FALSE !(waterLevel < 2) [L861] retValue_acc = 0 [L862] return (retValue_acc); [L738] RET, EXPR isHighWaterSensorDry() [L738] tmp = isHighWaterSensorDry() [L740] COND FALSE !(\read(tmp)) [L743] tmp___0 = 1 [L745] retValue_acc = tmp___0 [L746] return (retValue_acc); [L597] RET, EXPR isHighWaterLevel() [L597] tmp = isHighWaterLevel() [L599] COND TRUE \read(tmp) [L601] CALL activatePump() [L651] int tmp ; [L655] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L655] RET, EXPR isMethaneAlarm() [L655] tmp = isMethaneAlarm() [L657] COND FALSE !(\read(tmp)) [L661] CALL activatePump__wrappee__highWaterSensor() [L646] pumpRunning = 1 [L661] RET activatePump__wrappee__highWaterSensor() [L601] RET activatePump() [L636] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L578] RET __utac_acc__Specification4_spec__1() [L925] RET timeShift() [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND FALSE !(\read(tmp)) [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND TRUE \read(pumpRunning) [L565] CALL lowerWaterLevel() [L780] COND TRUE waterLevel > 0 [L781] waterLevel = waterLevel - 1 [L565] RET lowerWaterLevel() [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND TRUE \read(pumpRunning) [L623] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L623] RET, EXPR isMethaneAlarm() [L623] tmp = isMethaneAlarm() [L625] COND FALSE !(\read(tmp)) [L631] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND FALSE !(! pumpRunning) [L610] FCALL processEnvironment__wrappee__base() [L631] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L578] RET __utac_acc__Specification4_spec__1() [L925] RET timeShift() [L878] COND TRUE 1 [L880] COND TRUE splverifierCounter < 4 [L886] tmp = __VERIFIER_nondet_int() [L888] COND FALSE !(\read(tmp)) [L896] tmp___0 = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp___0)) [L906] tmp___2 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___2)) [L914] tmp___1 = __VERIFIER_nondet_int() [L916] COND FALSE !(\read(tmp___1)) [L925] CALL timeShift() [L563] COND TRUE \read(pumpRunning) [L565] CALL lowerWaterLevel() [L780] COND TRUE waterLevel > 0 [L781] waterLevel = waterLevel - 1 [L565] RET lowerWaterLevel() [L570] COND TRUE \read(systemActive) [L572] CALL processEnvironment() [L618] int tmp ; [L621] COND TRUE \read(pumpRunning) [L623] CALL, EXPR isMethaneAlarm() [L676] int retValue_acc ; [L680] CALL, EXPR isMethaneLevelCritical() [L813] int retValue_acc ; [L816] retValue_acc = methaneLevelCritical [L817] return (retValue_acc); [L680] RET, EXPR isMethaneLevelCritical() [L680] retValue_acc = isMethaneLevelCritical() [L682] return (retValue_acc); [L623] RET, EXPR isMethaneAlarm() [L623] tmp = isMethaneAlarm() [L625] COND FALSE !(\read(tmp)) [L631] CALL processEnvironment__wrappee__methaneQuery() [L592] int tmp ; [L595] COND FALSE !(! pumpRunning) [L610] FCALL processEnvironment__wrappee__base() [L631] RET processEnvironment__wrappee__methaneQuery() [L572] RET processEnvironment() [L578] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L845] int retValue_acc ; [L848] retValue_acc = waterLevel [L849] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND TRUE tmp == 0 [L53] CALL, EXPR isPumpRunning() [L687] int retValue_acc ; [L690] retValue_acc = pumpRunning [L691] return (retValue_acc); [L53] RET, EXPR isPumpRunning() [L53] tmp___0 = isPumpRunning() [L55] COND TRUE \read(tmp___0) [L57] CALL __automaton_fail() [L439] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 242 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 53.5s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 44.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1588 SDtfs, 4238 SDslu, 1797 SDs, 0 SdLazy, 11158 SolverSat, 3074 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 388 SyntacticMatches, 6 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 18.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2293occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 1512 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 1290 NumberOfCodeBlocks, 1290 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1076 ConstructedInterpolants, 0 QuantifiedInterpolants, 403327 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 172/193 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...