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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product57.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:17:00,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:17:00,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:17:00,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:17:00,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:17:00,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:17:00,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:17:00,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:17:00,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:17:00,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:17:00,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:17:00,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:17:00,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:17:00,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:17:00,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:17:00,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:17:00,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:17:00,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:17:00,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:17:00,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:17:00,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:17:00,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:17:00,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:17:00,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:17:00,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:17:00,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:17:00,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:17:00,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:17:00,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:17:00,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:17:00,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:17:00,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:17:00,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:17:00,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:17:00,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:17:00,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:17:00,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:17:00,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:17:00,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:17:00,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:17:00,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:17:00,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:17:00,550 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:17:00,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:17:00,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:17:00,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:17:00,552 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:17:00,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:17:00,555 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:17:00,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:17:00,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:17:00,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:17:00,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:17:00,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:17:00,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:17:00,556 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:17:00,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:17:00,556 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:17:00,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:17:00,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:17:00,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:17:00,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:17:00,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:17:00,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:17:00,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:17:00,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:17:00,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:17:00,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:17:00,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:17:00,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:17:00,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:17:00,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:17:00,898 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:17:00,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:17:00,903 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:17:00,903 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:17:00,904 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product57.cil.c [2019-10-13 23:17:00,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fa00a44e/c90306a4b94d41afbf94534caf65dc9e/FLAG1e63aea8d [2019-10-13 23:17:01,517 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:17:01,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product57.cil.c [2019-10-13 23:17:01,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fa00a44e/c90306a4b94d41afbf94534caf65dc9e/FLAG1e63aea8d [2019-10-13 23:17:01,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fa00a44e/c90306a4b94d41afbf94534caf65dc9e [2019-10-13 23:17:01,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:17:01,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:17:01,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:17:01,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:17:01,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:17:01,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:17:01" (1/1) ... [2019-10-13 23:17:01,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9dd291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:01, skipping insertion in model container [2019-10-13 23:17:01,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:17:01" (1/1) ... [2019-10-13 23:17:01,844 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:17:01,901 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:17:02,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:17:02,394 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:17:02,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:17:02,547 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:17:02,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02 WrapperNode [2019-10-13 23:17:02,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:17:02,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:17:02,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:17:02,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:17:02,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (1/1) ... [2019-10-13 23:17:02,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (1/1) ... [2019-10-13 23:17:02,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (1/1) ... [2019-10-13 23:17:02,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (1/1) ... [2019-10-13 23:17:02,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (1/1) ... [2019-10-13 23:17:02,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (1/1) ... [2019-10-13 23:17:02,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (1/1) ... [2019-10-13 23:17:02,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:17:02,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:17:02,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:17:02,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:17:02,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-13 23:17:02,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:17:02,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:17:02,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:17:02,719 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:17:02,719 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:17:02,720 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-13 23:17:02,721 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:17:02,722 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-13 23:17:02,722 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-10-13 23:17:02,722 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-13 23:17:02,722 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-13 23:17:02,724 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-13 23:17:02,724 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-13 23:17:02,724 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-13 23:17:02,724 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-13 23:17:02,725 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-13 23:17:02,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-13 23:17:02,728 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-13 23:17:02,728 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-13 23:17:02,728 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-13 23:17:02,729 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-13 23:17:02,729 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-13 23:17:02,729 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-13 23:17:02,729 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-13 23:17:02,729 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-13 23:17:02,730 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:17:02,730 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:17:02,730 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:17:02,730 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:17:02,731 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:17:02,731 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:17:02,732 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:17:02,732 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:17:02,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:17:02,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:17:02,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:17:02,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:17:02,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:17:02,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:17:02,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:17:02,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:17:02,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:17:02,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:17:02,734 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:17:02,735 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-13 23:17:02,735 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-13 23:17:02,735 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:17:02,735 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:17:02,735 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:17:02,735 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-13 23:17:02,736 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-13 23:17:02,736 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-13 23:17:02,736 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-13 23:17:02,736 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-13 23:17:02,736 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-13 23:17:02,736 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-13 23:17:02,737 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-13 23:17:02,737 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-13 23:17:02,737 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-13 23:17:02,737 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-13 23:17:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-13 23:17:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-13 23:17:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-13 23:17:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-13 23:17:02,738 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-10-13 23:17:02,739 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-13 23:17:02,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:17:02,739 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:17:02,739 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-13 23:17:02,739 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:17:02,739 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:17:02,740 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:17:02,740 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:17:02,741 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:17:02,741 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:17:02,741 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:17:02,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:17:02,742 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:17:02,742 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:17:02,742 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:17:02,743 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:17:02,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:17:02,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:17:02,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:17:02,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:17:02,744 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:17:02,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:17:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:17:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:17:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:17:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:17:02,747 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:17:02,747 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:17:02,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:17:02,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:17:02,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:17:04,440 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:17:04,441 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 23:17:04,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:17:04 BoogieIcfgContainer [2019-10-13 23:17:04,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:17:04,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:17:04,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:17:04,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:17:04,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:17:01" (1/3) ... [2019-10-13 23:17:04,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ec2659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:17:04, skipping insertion in model container [2019-10-13 23:17:04,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:17:02" (2/3) ... [2019-10-13 23:17:04,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ec2659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:17:04, skipping insertion in model container [2019-10-13 23:17:04,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:17:04" (3/3) ... [2019-10-13 23:17:04,451 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product57.cil.c [2019-10-13 23:17:04,461 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:17:04,471 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:17:04,483 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:17:04,512 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:17:04,512 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:17:04,512 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:17:04,513 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:17:04,513 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:17:04,513 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:17:04,513 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:17:04,513 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:17:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2019-10-13 23:17:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 23:17:04,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:04,552 INFO L380 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] [2019-10-13 23:17:04,554 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash 602218542, now seen corresponding path program 1 times [2019-10-13 23:17:04,572 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:04,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36976733] [2019-10-13 23:17:04,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:04,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:04,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:04,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36976733] [2019-10-13 23:17:04,930 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:04,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:17:04,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686158983] [2019-10-13 23:17:04,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:17:04,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:17:04,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:17:04,962 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 2 states. [2019-10-13 23:17:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:05,044 INFO L93 Difference]: Finished difference Result 237 states and 280 transitions. [2019-10-13 23:17:05,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:17:05,048 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2019-10-13 23:17:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:05,070 INFO L225 Difference]: With dead ends: 237 [2019-10-13 23:17:05,070 INFO L226 Difference]: Without dead ends: 119 [2019-10-13 23:17:05,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:17:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-13 23:17:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2019-10-13 23:17:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 23:17:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2019-10-13 23:17:05,160 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 42 [2019-10-13 23:17:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:05,160 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2019-10-13 23:17:05,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:17:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2019-10-13 23:17:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 23:17:05,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:05,165 INFO L380 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] [2019-10-13 23:17:05,165 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash -865784585, now seen corresponding path program 1 times [2019-10-13 23:17:05,167 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:05,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321759440] [2019-10-13 23:17:05,168 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:05,168 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:05,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:05,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321759440] [2019-10-13 23:17:05,354 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:05,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:17:05,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737727237] [2019-10-13 23:17:05,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:17:05,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:05,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:17:05,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:17:05,359 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand 3 states. [2019-10-13 23:17:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:05,406 INFO L93 Difference]: Finished difference Result 195 states and 219 transitions. [2019-10-13 23:17:05,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:17:05,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-13 23:17:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:05,411 INFO L225 Difference]: With dead ends: 195 [2019-10-13 23:17:05,411 INFO L226 Difference]: Without dead ends: 111 [2019-10-13 23:17:05,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:17:05,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-13 23:17:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-10-13 23:17:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 23:17:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2019-10-13 23:17:05,442 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 43 [2019-10-13 23:17:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:05,443 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2019-10-13 23:17:05,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:17:05,443 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2019-10-13 23:17:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 23:17:05,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:05,455 INFO L380 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] [2019-10-13 23:17:05,455 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:05,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1972021982, now seen corresponding path program 1 times [2019-10-13 23:17:05,456 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:05,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757949905] [2019-10-13 23:17:05,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:05,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:05,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:05,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757949905] [2019-10-13 23:17:05,648 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:05,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:17:05,649 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813998053] [2019-10-13 23:17:05,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:17:05,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:05,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:17:05,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:17:05,651 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 7 states. [2019-10-13 23:17:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:06,010 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2019-10-13 23:17:06,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:17:06,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-10-13 23:17:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:06,014 INFO L225 Difference]: With dead ends: 200 [2019-10-13 23:17:06,014 INFO L226 Difference]: Without dead ends: 111 [2019-10-13 23:17:06,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:17:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-13 23:17:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-10-13 23:17:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 23:17:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2019-10-13 23:17:06,043 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 45 [2019-10-13 23:17:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:06,044 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2019-10-13 23:17:06,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:17:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2019-10-13 23:17:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 23:17:06,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:06,050 INFO L380 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] [2019-10-13 23:17:06,050 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:06,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1730274497, now seen corresponding path program 1 times [2019-10-13 23:17:06,051 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:06,051 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99828694] [2019-10-13 23:17:06,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:06,052 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:06,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:06,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99828694] [2019-10-13 23:17:06,195 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:06,195 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:17:06,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452603580] [2019-10-13 23:17:06,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:17:06,197 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:06,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:17:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:17:06,197 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 5 states. [2019-10-13 23:17:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:06,657 INFO L93 Difference]: Finished difference Result 284 states and 327 transitions. [2019-10-13 23:17:06,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:17:06,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-10-13 23:17:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:06,660 INFO L225 Difference]: With dead ends: 284 [2019-10-13 23:17:06,660 INFO L226 Difference]: Without dead ends: 195 [2019-10-13 23:17:06,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:17:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-10-13 23:17:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 180. [2019-10-13 23:17:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-10-13 23:17:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 196 transitions. [2019-10-13 23:17:06,719 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 196 transitions. Word has length 58 [2019-10-13 23:17:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:06,720 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 196 transitions. [2019-10-13 23:17:06,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:17:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 196 transitions. [2019-10-13 23:17:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 23:17:06,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:06,723 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:17:06,723 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:06,724 INFO L82 PathProgramCache]: Analyzing trace with hash 19997047, now seen corresponding path program 1 times [2019-10-13 23:17:06,724 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:06,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075329532] [2019-10-13 23:17:06,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:06,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:06,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:06,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075329532] [2019-10-13 23:17:06,843 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:06,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:17:06,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510401741] [2019-10-13 23:17:06,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:17:06,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:17:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:17:06,846 INFO L87 Difference]: Start difference. First operand 180 states and 196 transitions. Second operand 10 states. [2019-10-13 23:17:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:07,410 INFO L93 Difference]: Finished difference Result 536 states and 611 transitions. [2019-10-13 23:17:07,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 23:17:07,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-10-13 23:17:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:07,418 INFO L225 Difference]: With dead ends: 536 [2019-10-13 23:17:07,418 INFO L226 Difference]: Without dead ends: 378 [2019-10-13 23:17:07,420 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:17:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-10-13 23:17:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 364. [2019-10-13 23:17:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2019-10-13 23:17:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 402 transitions. [2019-10-13 23:17:07,455 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 402 transitions. Word has length 67 [2019-10-13 23:17:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:07,456 INFO L462 AbstractCegarLoop]: Abstraction has 364 states and 402 transitions. [2019-10-13 23:17:07,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:17:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 402 transitions. [2019-10-13 23:17:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 23:17:07,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:07,459 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:17:07,459 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1292948161, now seen corresponding path program 1 times [2019-10-13 23:17:07,460 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:07,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234370550] [2019-10-13 23:17:07,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:07,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:07,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:17:07,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234370550] [2019-10-13 23:17:07,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583056789] [2019-10-13 23:17:07,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:07,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:17:07,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:07,896 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:17:08,201 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:17:08,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 3] total 8 [2019-10-13 23:17:08,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127614314] [2019-10-13 23:17:08,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:17:08,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:08,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:17:08,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:17:08,206 INFO L87 Difference]: Start difference. First operand 364 states and 402 transitions. Second operand 3 states. [2019-10-13 23:17:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:08,301 INFO L93 Difference]: Finished difference Result 709 states and 784 transitions. [2019-10-13 23:17:08,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:17:08,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-10-13 23:17:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:08,305 INFO L225 Difference]: With dead ends: 709 [2019-10-13 23:17:08,305 INFO L226 Difference]: Without dead ends: 367 [2019-10-13 23:17:08,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 256 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:17:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-10-13 23:17:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 339. [2019-10-13 23:17:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2019-10-13 23:17:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 360 transitions. [2019-10-13 23:17:08,333 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 360 transitions. Word has length 128 [2019-10-13 23:17:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:08,334 INFO L462 AbstractCegarLoop]: Abstraction has 339 states and 360 transitions. [2019-10-13 23:17:08,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:17:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 360 transitions. [2019-10-13 23:17:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 23:17:08,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:08,336 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:17:08,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:08,544 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:08,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1080968167, now seen corresponding path program 1 times [2019-10-13 23:17:08,545 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:08,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105295338] [2019-10-13 23:17:08,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:08,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 23:17:08,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105295338] [2019-10-13 23:17:08,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887162033] [2019-10-13 23:17:08,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:08,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:17:08,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:17:08,931 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 23:17:09,136 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:17:09,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2019-10-13 23:17:09,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482728607] [2019-10-13 23:17:09,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:17:09,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:09,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:17:09,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:17:09,138 INFO L87 Difference]: Start difference. First operand 339 states and 360 transitions. Second operand 7 states. [2019-10-13 23:17:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:09,349 INFO L93 Difference]: Finished difference Result 348 states and 369 transitions. [2019-10-13 23:17:09,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:17:09,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-13 23:17:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:09,352 INFO L225 Difference]: With dead ends: 348 [2019-10-13 23:17:09,352 INFO L226 Difference]: Without dead ends: 345 [2019-10-13 23:17:09,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:17:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-10-13 23:17:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 339. [2019-10-13 23:17:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2019-10-13 23:17:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 359 transitions. [2019-10-13 23:17:09,374 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 359 transitions. Word has length 115 [2019-10-13 23:17:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:09,375 INFO L462 AbstractCegarLoop]: Abstraction has 339 states and 359 transitions. [2019-10-13 23:17:09,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:17:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 359 transitions. [2019-10-13 23:17:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 23:17:09,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:09,377 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:17:09,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:09,591 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash 278854686, now seen corresponding path program 1 times [2019-10-13 23:17:09,592 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:09,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000931284] [2019-10-13 23:17:09,592 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:09,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:09,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:17:09,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000931284] [2019-10-13 23:17:09,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025335337] [2019-10-13 23:17:09,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:10,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 23:17:10,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:10,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:10,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:10,419 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:10,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:11,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:17:12,044 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:17:12,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14, 12] total 34 [2019-10-13 23:17:12,044 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459396875] [2019-10-13 23:17:12,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 23:17:12,045 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:12,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 23:17:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 23:17:12,047 INFO L87 Difference]: Start difference. First operand 339 states and 359 transitions. Second operand 12 states. [2019-10-13 23:17:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:13,976 INFO L93 Difference]: Finished difference Result 800 states and 898 transitions. [2019-10-13 23:17:13,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 23:17:13,977 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 125 [2019-10-13 23:17:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:13,982 INFO L225 Difference]: With dead ends: 800 [2019-10-13 23:17:13,983 INFO L226 Difference]: Without dead ends: 483 [2019-10-13 23:17:13,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 227 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2019-10-13 23:17:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2019-10-13 23:17:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 462. [2019-10-13 23:17:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-13 23:17:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 506 transitions. [2019-10-13 23:17:14,019 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 506 transitions. Word has length 125 [2019-10-13 23:17:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:14,019 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 506 transitions. [2019-10-13 23:17:14,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 23:17:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 506 transitions. [2019-10-13 23:17:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 23:17:14,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:14,023 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:17:14,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:14,227 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash 404617193, now seen corresponding path program 1 times [2019-10-13 23:17:14,228 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:14,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327762053] [2019-10-13 23:17:14,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:14,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:14,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:17:14,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327762053] [2019-10-13 23:17:14,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931035347] [2019-10-13 23:17:14,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:14,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 23:17:14,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:17:14,702 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:17:15,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:17:15,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 19 [2019-10-13 23:17:15,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683810643] [2019-10-13 23:17:15,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:17:15,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:15,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:17:15,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:17:15,267 INFO L87 Difference]: Start difference. First operand 462 states and 506 transitions. Second operand 8 states. [2019-10-13 23:17:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:15,770 INFO L93 Difference]: Finished difference Result 1123 states and 1237 transitions. [2019-10-13 23:17:15,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:17:15,770 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2019-10-13 23:17:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:15,776 INFO L225 Difference]: With dead ends: 1123 [2019-10-13 23:17:15,776 INFO L226 Difference]: Without dead ends: 800 [2019-10-13 23:17:15,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:17:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2019-10-13 23:17:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 785. [2019-10-13 23:17:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2019-10-13 23:17:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 855 transitions. [2019-10-13 23:17:15,828 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 855 transitions. Word has length 138 [2019-10-13 23:17:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:15,829 INFO L462 AbstractCegarLoop]: Abstraction has 785 states and 855 transitions. [2019-10-13 23:17:15,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:17:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 855 transitions. [2019-10-13 23:17:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 23:17:15,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:15,833 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:17:16,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:16,038 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2113106723, now seen corresponding path program 2 times [2019-10-13 23:17:16,039 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:16,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777289510] [2019-10-13 23:17:16,039 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:16,039 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:16,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:17:16,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777289510] [2019-10-13 23:17:16,295 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:17:16,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2019-10-13 23:17:16,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187192661] [2019-10-13 23:17:16,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 23:17:16,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:17:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 23:17:16,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:17:16,297 INFO L87 Difference]: Start difference. First operand 785 states and 855 transitions. Second operand 14 states. [2019-10-13 23:17:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:17:16,628 INFO L93 Difference]: Finished difference Result 1265 states and 1405 transitions. [2019-10-13 23:17:16,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 23:17:16,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 128 [2019-10-13 23:17:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:17:16,634 INFO L225 Difference]: With dead ends: 1265 [2019-10-13 23:17:16,634 INFO L226 Difference]: Without dead ends: 833 [2019-10-13 23:17:16,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-10-13 23:17:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2019-10-13 23:17:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 770. [2019-10-13 23:17:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2019-10-13 23:17:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 835 transitions. [2019-10-13 23:17:16,690 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 835 transitions. Word has length 128 [2019-10-13 23:17:16,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:17:16,691 INFO L462 AbstractCegarLoop]: Abstraction has 770 states and 835 transitions. [2019-10-13 23:17:16,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 23:17:16,691 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 835 transitions. [2019-10-13 23:17:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 23:17:16,695 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:17:16,696 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:17:16,696 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:17:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:17:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 136520726, now seen corresponding path program 1 times [2019-10-13 23:17:16,697 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:17:16,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705864693] [2019-10-13 23:17:16,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:16,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:17:16,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:17:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:17:17,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705864693] [2019-10-13 23:17:17,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928295371] [2019-10-13 23:17:17,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:17:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:17:17,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-13 23:17:17,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:17:17,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:17:17,442 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:17:17,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:17,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:17,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:18,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:18,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:18,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:18,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:17:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 23:17:18,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514658328] [2019-10-13 23:17:18,288 INFO L162 IcfgInterpreter]: Started Sifa with 104 locations of interest [2019-10-13 23:17:18,288 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:17:18,296 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:17:18,319 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:17:18,320 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:17:27,446 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 464 [2019-10-13 23:17:29,187 WARN L191 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-13 23:17:29,304 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:29,434 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:29,552 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-13 23:17:29,806 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:30,000 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:30,170 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:30,347 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:30,675 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 540 [2019-10-13 23:17:30,803 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:30,967 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:31,085 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:31,254 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-13 23:17:31,368 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2019-10-13 23:17:31,593 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 542 for LOIs [2019-10-13 23:17:31,797 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:31,948 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:32,063 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:32,289 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:32,460 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:32,601 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:32,717 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:32,895 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 542 [2019-10-13 23:17:33,114 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:33,260 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:33,371 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:33,486 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:33,797 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:34,011 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:34,124 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:34,432 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:34,636 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:34,771 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:35,078 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:35,383 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:35,499 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:35,605 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2019-10-13 23:17:35,718 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:36,026 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:36,171 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:36,305 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:36,423 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:36,625 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 552 [2019-10-13 23:17:36,728 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:36,865 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:36,969 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:37,072 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:37,199 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:37,370 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 554 [2019-10-13 23:17:37,474 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 554 [2019-10-13 23:17:37,593 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,704 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,813 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:37,936 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:38,182 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 554 [2019-10-13 23:17:38,287 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 554 [2019-10-13 23:17:38,401 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2019-10-13 23:17:38,515 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 561 [2019-10-13 23:17:38,626 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 561 [2019-10-13 23:17:38,747 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 561 [2019-10-13 23:17:38,857 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:38,963 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:39,119 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:39,242 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:39,352 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:39,469 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:39,580 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:39,690 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:39,813 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:39,919 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:40,034 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:40,168 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2019-10-13 23:17:40,410 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 552 [2019-10-13 23:17:40,513 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:40,642 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:40,834 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 552 [2019-10-13 23:17:40,936 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:41,052 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:41,160 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:41,265 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:41,375 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 552 [2019-10-13 23:17:41,586 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 556 [2019-10-13 23:17:41,702 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 556