/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -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/elevator_spec14_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:07:37,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:07:37,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:07:37,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:07:37,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:07:37,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:07:37,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:07:37,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:07:37,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:07:37,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:07:37,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:07:37,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:07:37,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:07:37,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:07:37,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:07:37,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:07:37,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:07:37,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:07:37,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:07:37,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:07:37,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:07:37,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:07:37,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:07:37,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:07:37,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:07:37,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:07:37,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:07:37,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:07:37,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:07:37,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:07:37,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:07:37,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:07:37,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:07:37,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:07:37,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:07:37,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:07:37,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:07:37,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:07:37,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:07:37,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:07:37,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:07:37,776 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 [2019-11-07 04:07:37,801 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:07:37,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:07:37,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:07:37,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:07:37,804 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:07:37,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:07:37,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:07:37,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:07:37,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:07:37,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:07:37,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:07:37,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:07:37,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:07:37,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:07:37,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:07:37,810 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:07:37,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:07:37,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:07:37,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:07:37,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:07:37,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:07:37,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:07:37,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:07:37,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:07:37,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:07:37,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:07:37,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:07:37,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:07:37,817 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 [2019-11-07 04:07:38,114 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:07:38,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:07:38,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:07:38,133 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:07:38,133 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:07:38,134 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product27.cil.c [2019-11-07 04:07:38,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6de5f0969/7afb195dfa3249c89032e5f6069668ca/FLAG57b6039d9 [2019-11-07 04:07:38,829 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:07:38,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product27.cil.c [2019-11-07 04:07:38,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6de5f0969/7afb195dfa3249c89032e5f6069668ca/FLAG57b6039d9 [2019-11-07 04:07:39,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6de5f0969/7afb195dfa3249c89032e5f6069668ca [2019-11-07 04:07:39,049 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:07:39,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:07:39,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:07:39,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:07:39,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:07:39,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:07:39" (1/1) ... [2019-11-07 04:07:39,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63baf6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:39, skipping insertion in model container [2019-11-07 04:07:39,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:07:39" (1/1) ... [2019-11-07 04:07:39,066 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:07:39,144 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:07:39,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:07:39,863 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:07:40,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:07:40,089 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:07:40,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40 WrapperNode [2019-11-07 04:07:40,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:07:40,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:07:40,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:07:40,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:07:40,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (1/1) ... [2019-11-07 04:07:40,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (1/1) ... [2019-11-07 04:07:40,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (1/1) ... [2019-11-07 04:07:40,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (1/1) ... [2019-11-07 04:07:40,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (1/1) ... [2019-11-07 04:07:40,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (1/1) ... [2019-11-07 04:07:40,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (1/1) ... [2019-11-07 04:07:40,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:07:40,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:07:40,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:07:40,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:07:40,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (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 [2019-11-07 04:07:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:07:40,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:07:40,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:07:40,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:07:40,433 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:07:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:07:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:07:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 04:07:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:07:40,436 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 04:07:40,436 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 04:07:40,437 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:07:40,437 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:07:40,437 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:07:40,438 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:07:40,438 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:07:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:07:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:07:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:07:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:07:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:07:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 04:07:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:07:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:07:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:07:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 04:07:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:07:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:07:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:07:40,443 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:07:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:07:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:07:40,444 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 04:07:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 04:07:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:07:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:07:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:07:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:07:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:07:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:07:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:07:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:07:40,447 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:07:40,447 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:07:40,447 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:07:40,448 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:07:40,448 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:07:40,448 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:07:40,448 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:07:40,449 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:07:40,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:07:40,449 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:07:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:07:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:07:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:07:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:07:40,451 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:07:40,451 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:07:40,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:07:40,452 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:07:40,453 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:07:40,453 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:07:40,453 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:07:40,453 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:07:40,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 04:07:40,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:07:40,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:07:40,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:07:40,454 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:07:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:07:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:07:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:07:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:07:40,457 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:07:40,457 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:07:40,457 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:07:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:07:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:07:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:07:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:07:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:07:40,460 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:07:40,461 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:07:40,461 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:07:40,461 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:07:40,461 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:07:40,462 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:07:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:07:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:07:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:07:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:07:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:07:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:07:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:07:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:07:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:07:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:07:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:07:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:07:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:07:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 04:07:40,466 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 04:07:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 04:07:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 04:07:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 04:07:40,467 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:07:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:07:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:07:40,468 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:07:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:07:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 04:07:40,469 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:07:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:07:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 04:07:40,470 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:07:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:07:40,471 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:07:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 04:07:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:07:40,472 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:07:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:07:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:07:40,473 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:07:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:07:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:07:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:07:40,476 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:07:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:07:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:07:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:07:40,477 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:07:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:07:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:07:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:07:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:07:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:07:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:07:40,486 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:07:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:07:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:07:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:07:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:07:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:07:40,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:07:40,498 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:07:40,498 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:07:40,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:07:40,498 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:07:40,498 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:07:40,499 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:07:40,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:07:40,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:07:40,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:07:40,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:07:40,500 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:07:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:07:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:07:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:07:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:07:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:07:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:07:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:07:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:07:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:07:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:07:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:07:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:07:45,529 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:07:45,530 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:07:45,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:45 BoogieIcfgContainer [2019-11-07 04:07:45,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:07:45,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:07:45,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:07:45,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:07:45,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:07:39" (1/3) ... [2019-11-07 04:07:45,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c36ba54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:45, skipping insertion in model container [2019-11-07 04:07:45,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:40" (2/3) ... [2019-11-07 04:07:45,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c36ba54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:45, skipping insertion in model container [2019-11-07 04:07:45,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:45" (3/3) ... [2019-11-07 04:07:45,540 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2019-11-07 04:07:45,550 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:07:45,559 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:07:45,571 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:07:45,599 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:07:45,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:07:45,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:07:45,600 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:07:45,600 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:07:45,600 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:07:45,600 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:07:45,600 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:07:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states. [2019-11-07 04:07:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:07:45,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:45,656 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:45,659 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:45,664 INFO L82 PathProgramCache]: Analyzing trace with hash 172227344, now seen corresponding path program 1 times [2019-11-07 04:07:45,674 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:45,675 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473273558] [2019-11-07 04:07:45,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 04:07:46,444 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473273558] [2019-11-07 04:07:46,444 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:46,445 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 04:07:46,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477856922] [2019-11-07 04:07:46,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:07:46,452 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:46,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:07:46,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:46,469 INFO L87 Difference]: Start difference. First operand 547 states. Second operand 7 states. [2019-11-07 04:07:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:48,093 INFO L93 Difference]: Finished difference Result 969 states and 1426 transitions. [2019-11-07 04:07:48,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 04:07:48,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2019-11-07 04:07:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:48,119 INFO L225 Difference]: With dead ends: 969 [2019-11-07 04:07:48,119 INFO L226 Difference]: Without dead ends: 544 [2019-11-07 04:07:48,129 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:07:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2019-11-07 04:07:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 538. [2019-11-07 04:07:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2019-11-07 04:07:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 770 transitions. [2019-11-07 04:07:48,243 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 770 transitions. Word has length 110 [2019-11-07 04:07:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:48,244 INFO L462 AbstractCegarLoop]: Abstraction has 538 states and 770 transitions. [2019-11-07 04:07:48,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:07:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 770 transitions. [2019-11-07 04:07:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-07 04:07:48,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:48,268 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:48,268 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:48,269 INFO L82 PathProgramCache]: Analyzing trace with hash -115405177, now seen corresponding path program 1 times [2019-11-07 04:07:48,269 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:48,269 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977221791] [2019-11-07 04:07:48,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-07 04:07:48,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977221791] [2019-11-07 04:07:48,699 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:48,699 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:07:48,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468456866] [2019-11-07 04:07:48,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:48,707 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:48,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:48,708 INFO L87 Difference]: Start difference. First operand 538 states and 770 transitions. Second operand 5 states. [2019-11-07 04:07:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:48,778 INFO L93 Difference]: Finished difference Result 1051 states and 1519 transitions. [2019-11-07 04:07:48,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:48,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2019-11-07 04:07:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:48,785 INFO L225 Difference]: With dead ends: 1051 [2019-11-07 04:07:48,785 INFO L226 Difference]: Without dead ends: 544 [2019-11-07 04:07:48,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2019-11-07 04:07:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2019-11-07 04:07:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-11-07 04:07:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 776 transitions. [2019-11-07 04:07:48,838 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 776 transitions. Word has length 211 [2019-11-07 04:07:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:48,839 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 776 transitions. [2019-11-07 04:07:48,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 776 transitions. [2019-11-07 04:07:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-07 04:07:48,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:48,846 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:48,847 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash 52849665, now seen corresponding path program 1 times [2019-11-07 04:07:48,847 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:48,848 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202474453] [2019-11-07 04:07:48,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-11-07 04:07:49,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202474453] [2019-11-07 04:07:49,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470027091] [2019-11-07 04:07:49,094 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 [2019-11-07 04:07:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:49,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:49,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-07 04:07:49,890 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-11-07 04:07:50,268 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:50,269 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 04:07:50,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096091339] [2019-11-07 04:07:50,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:50,270 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:07:50,271 INFO L87 Difference]: Start difference. First operand 544 states and 776 transitions. Second operand 4 states. [2019-11-07 04:07:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:50,517 INFO L93 Difference]: Finished difference Result 1096 states and 1603 transitions. [2019-11-07 04:07:50,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:50,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2019-11-07 04:07:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:50,529 INFO L225 Difference]: With dead ends: 1096 [2019-11-07 04:07:50,530 INFO L226 Difference]: Without dead ends: 583 [2019-11-07 04:07:50,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 431 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:07:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2019-11-07 04:07:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2019-11-07 04:07:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2019-11-07 04:07:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 849 transitions. [2019-11-07 04:07:50,596 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 849 transitions. Word has length 216 [2019-11-07 04:07:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:50,598 INFO L462 AbstractCegarLoop]: Abstraction has 583 states and 849 transitions. [2019-11-07 04:07:50,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 849 transitions. [2019-11-07 04:07:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-11-07 04:07:50,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:50,607 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:50,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:50,817 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1118436342, now seen corresponding path program 1 times [2019-11-07 04:07:50,818 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:50,818 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289629808] [2019-11-07 04:07:50,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-07 04:07:51,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289629808] [2019-11-07 04:07:51,224 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992563756] [2019-11-07 04:07:51,224 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 [2019-11-07 04:07:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:51,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 3682 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:51,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-11-07 04:07:52,058 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2019-11-07 04:07:52,434 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:52,434 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 13 [2019-11-07 04:07:52,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504518246] [2019-11-07 04:07:52,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:52,436 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:52,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:52,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:07:52,437 INFO L87 Difference]: Start difference. First operand 583 states and 849 transitions. Second operand 4 states. [2019-11-07 04:07:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:52,665 INFO L93 Difference]: Finished difference Result 1174 states and 1748 transitions. [2019-11-07 04:07:52,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:52,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 282 [2019-11-07 04:07:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:52,670 INFO L225 Difference]: With dead ends: 1174 [2019-11-07 04:07:52,670 INFO L226 Difference]: Without dead ends: 622 [2019-11-07 04:07:52,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 567 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-07 04:07:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-11-07 04:07:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-11-07 04:07:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-11-07 04:07:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 922 transitions. [2019-11-07 04:07:52,706 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 922 transitions. Word has length 282 [2019-11-07 04:07:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:52,708 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 922 transitions. [2019-11-07 04:07:52,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 922 transitions. [2019-11-07 04:07:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-07 04:07:52,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:52,714 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:52,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:52,924 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:52,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1621088259, now seen corresponding path program 1 times [2019-11-07 04:07:52,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:52,925 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043654125] [2019-11-07 04:07:52,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-07 04:07:53,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043654125] [2019-11-07 04:07:53,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520125602] [2019-11-07 04:07:53,137 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 [2019-11-07 04:07:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:54,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 3304 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:54,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-07 04:07:54,083 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-07 04:07:54,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:54,308 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:07:54,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866479459] [2019-11-07 04:07:54,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:54,311 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:54,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:54,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:54,311 INFO L87 Difference]: Start difference. First operand 622 states and 922 transitions. Second operand 4 states. [2019-11-07 04:07:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:54,507 INFO L93 Difference]: Finished difference Result 1252 states and 1893 transitions. [2019-11-07 04:07:54,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:54,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2019-11-07 04:07:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:54,514 INFO L225 Difference]: With dead ends: 1252 [2019-11-07 04:07:54,514 INFO L226 Difference]: Without dead ends: 661 [2019-11-07 04:07:54,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2019-11-07 04:07:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2019-11-07 04:07:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2019-11-07 04:07:54,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 995 transitions. [2019-11-07 04:07:54,548 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 995 transitions. Word has length 225 [2019-11-07 04:07:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:54,551 INFO L462 AbstractCegarLoop]: Abstraction has 661 states and 995 transitions. [2019-11-07 04:07:54,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 995 transitions. [2019-11-07 04:07:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-07 04:07:54,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:54,557 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:54,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:54,765 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash 818477089, now seen corresponding path program 1 times [2019-11-07 04:07:54,766 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:54,766 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003329797] [2019-11-07 04:07:54,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-11-07 04:07:54,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003329797] [2019-11-07 04:07:54,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458890196] [2019-11-07 04:07:54,963 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 [2019-11-07 04:07:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:56,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 3307 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:56,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-07 04:07:56,495 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-11-07 04:07:56,798 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:56,798 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:07:56,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378388922] [2019-11-07 04:07:56,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:56,799 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:56,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:56,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:56,800 INFO L87 Difference]: Start difference. First operand 661 states and 995 transitions. Second operand 4 states. [2019-11-07 04:07:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:57,031 INFO L93 Difference]: Finished difference Result 1330 states and 2038 transitions. [2019-11-07 04:07:57,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:57,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 228 [2019-11-07 04:07:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:57,038 INFO L225 Difference]: With dead ends: 1330 [2019-11-07 04:07:57,038 INFO L226 Difference]: Without dead ends: 700 [2019-11-07 04:07:57,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 453 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-11-07 04:07:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2019-11-07 04:07:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-11-07 04:07:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1068 transitions. [2019-11-07 04:07:57,072 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1068 transitions. Word has length 228 [2019-11-07 04:07:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:57,073 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1068 transitions. [2019-11-07 04:07:57,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:57,073 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1068 transitions. [2019-11-07 04:07:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-07 04:07:57,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:57,079 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:57,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:57,287 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1015124303, now seen corresponding path program 1 times [2019-11-07 04:07:57,288 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:57,288 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470536695] [2019-11-07 04:07:57,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-07 04:07:57,605 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470536695] [2019-11-07 04:07:57,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613264903] [2019-11-07 04:07:57,606 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 [2019-11-07 04:07:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:58,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 3303 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 04:07:58,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-07 04:07:58,389 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-11-07 04:07:58,676 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:58,677 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6] total 13 [2019-11-07 04:07:58,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718669162] [2019-11-07 04:07:58,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 04:07:58,681 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:58,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 04:07:58,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:07:58,682 INFO L87 Difference]: Start difference. First operand 700 states and 1068 transitions. Second operand 9 states. [2019-11-07 04:08:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:08:02,294 INFO L93 Difference]: Finished difference Result 1969 states and 3063 transitions. [2019-11-07 04:08:02,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 04:08:02,296 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 230 [2019-11-07 04:08:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:08:02,308 INFO L225 Difference]: With dead ends: 1969 [2019-11-07 04:08:02,309 INFO L226 Difference]: Without dead ends: 1300 [2019-11-07 04:08:02,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-11-07 04:08:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2019-11-07 04:08:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1261. [2019-11-07 04:08:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1261 states. [2019-11-07 04:08:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1968 transitions. [2019-11-07 04:08:02,392 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1968 transitions. Word has length 230 [2019-11-07 04:08:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:08:02,392 INFO L462 AbstractCegarLoop]: Abstraction has 1261 states and 1968 transitions. [2019-11-07 04:08:02,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 04:08:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1968 transitions. [2019-11-07 04:08:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 04:08:02,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:08:02,400 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:08:02,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:08:02,609 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:08:02,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:08:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash -282558234, now seen corresponding path program 1 times [2019-11-07 04:08:02,611 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:08:02,611 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808100839] [2019-11-07 04:08:02,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:08:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-07 04:08:03,031 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808100839] [2019-11-07 04:08:03,031 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275284717] [2019-11-07 04:08:03,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:08:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:03,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 2921 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-07 04:08:03,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-07 04:08:03,968 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:04,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:08:04,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:08:04,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:08:04,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:08:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-07 04:08:04,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175537648] [2019-11-07 04:08:04,275 INFO L159 IcfgInterpreter]: Started Sifa with 131 locations of interest [2019-11-07 04:08:04,275 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:08:04,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:08:04,303 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:08:04,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs