/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:40:00,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:40:00,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:40:00,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:40:00,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:40:00,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:40:00,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:40:00,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:40:00,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:40:00,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:40:00,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:40:00,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:40:00,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:40:00,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:40:00,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:40:00,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:40:00,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:40:00,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:40:00,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:40:00,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:40:00,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:40:00,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:40:00,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:40:00,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:40:00,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:40:00,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:40:00,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:40:00,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:40:00,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:40:00,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:40:00,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:40:00,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:40:00,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:40:00,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:40:00,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:40:00,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:40:00,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:40:00,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:40:00,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:40:00,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:40:00,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:40:00,446 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 00:40:00,459 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:40:00,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:40:00,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:40:00,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:40:00,461 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:40:00,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:40:00,462 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:40:00,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:40:00,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:40:00,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:40:00,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:40:00,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:40:00,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:40:00,463 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:40:00,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:40:00,463 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:40:00,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:40:00,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:40:00,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:40:00,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:40:00,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:40:00,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:40:00,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:40:00,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:40:00,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:40:00,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:40:00,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:40:00,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:40:00,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:40:00,753 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:40:00,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:40:00,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:40:00,774 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:40:00,775 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:40:00,775 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product11.cil.c [2019-11-07 00:40:00,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0543ed93c/2ca17be3e5294593a1e2c84fae081a66/FLAG105ff32fd [2019-11-07 00:40:01,480 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:40:01,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product11.cil.c [2019-11-07 00:40:01,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0543ed93c/2ca17be3e5294593a1e2c84fae081a66/FLAG105ff32fd [2019-11-07 00:40:01,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0543ed93c/2ca17be3e5294593a1e2c84fae081a66 [2019-11-07 00:40:01,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:40:01,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:40:01,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:01,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:40:01,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:40:01,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:01" (1/1) ... [2019-11-07 00:40:01,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acb9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:01, skipping insertion in model container [2019-11-07 00:40:01,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:01" (1/1) ... [2019-11-07 00:40:01,688 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:40:01,769 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:40:02,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:02,518 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:40:02,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:02,695 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:40:02,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02 WrapperNode [2019-11-07 00:40:02,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:02,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:40:02,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:40:02,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:40:02,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (1/1) ... [2019-11-07 00:40:02,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (1/1) ... [2019-11-07 00:40:02,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (1/1) ... [2019-11-07 00:40:02,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (1/1) ... [2019-11-07 00:40:02,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (1/1) ... [2019-11-07 00:40:02,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (1/1) ... [2019-11-07 00:40:02,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (1/1) ... [2019-11-07 00:40:02,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:40:02,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:40:02,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:40:02,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:40:02,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (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 [2019-11-07 00:40:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:40:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:40:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:02,971 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:40:02,971 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:40:02,972 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:40:02,972 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:40:02,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:02,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:02,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:02,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:02,974 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:40:02,974 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:40:02,975 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:40:02,975 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:40:02,976 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:40:02,977 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:40:02,978 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:40:02,978 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:40:02,978 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:40:02,978 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:40:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:40:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:40:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:40:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:40:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:40:02,980 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:40:02,980 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:40:02,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:40:02,980 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:40:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:40:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:40:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:40:02,982 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:40:02,982 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:40:02,982 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:40:02,982 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:40:02,982 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:40:02,982 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:40:02,983 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:40:02,983 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:40:02,983 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:40:02,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:40:02,983 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:40:02,983 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:40:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:40:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:40:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:40:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:40:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:40:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:40:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:40:02,985 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:40:02,986 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:40:02,986 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:40:02,986 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:40:02,986 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:40:02,987 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:40:02,987 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:40:02,987 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:40:02,987 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:40:02,988 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:40:02,988 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:40:02,988 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:40:02,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:40:02,988 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:40:02,989 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:40:02,989 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:40:02,989 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:40:02,990 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:40:02,990 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:40:02,990 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:40:02,990 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:40:02,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:40:02,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:40:02,991 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:40:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:40:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:40:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:40:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:40:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:40:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:40:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:40:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:40:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:40:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:40:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:40:02,996 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:40:02,996 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:40:02,996 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:40:02,996 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:40:02,996 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:40:02,996 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:40:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:40:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:40:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:40:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:40:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:40:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:40:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:40:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:40:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:40:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:40:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:40:02,999 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:40:02,999 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:40:02,999 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:40:02,999 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:40:02,999 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:40:02,999 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:40:03,002 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:40:03,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:40:03,002 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:40:03,002 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:40:03,003 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:40:03,003 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:40:03,003 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:40:03,003 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:40:03,004 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:40:03,004 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:40:03,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:40:03,004 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:40:03,005 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:40:03,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:03,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:40:03,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:40:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:40:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:40:03,010 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:03,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:40:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:03,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:40:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:40:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:40:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:40:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:40:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:40:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:40:03,018 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:40:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:40:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:40:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:40:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:40:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:40:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:40:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:40:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:40:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:40:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:40:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:40:03,021 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:40:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:40:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:40:03,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:40:05,483 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:40:05,483 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:40:05,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:05 BoogieIcfgContainer [2019-11-07 00:40:05,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:40:05,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:40:05,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:40:05,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:40:05,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:40:01" (1/3) ... [2019-11-07 00:40:05,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe4d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:05, skipping insertion in model container [2019-11-07 00:40:05,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:02" (2/3) ... [2019-11-07 00:40:05,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe4d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:05, skipping insertion in model container [2019-11-07 00:40:05,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:05" (3/3) ... [2019-11-07 00:40:05,496 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product11.cil.c [2019-11-07 00:40:05,506 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:40:05,519 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:40:05,531 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:40:05,578 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:40:05,578 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:40:05,578 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:40:05,578 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:40:05,578 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:40:05,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:40:05,578 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:40:05,579 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:40:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states. [2019-11-07 00:40:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:40:05,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:05,646 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:05,650 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2009729749, now seen corresponding path program 1 times [2019-11-07 00:40:05,668 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:05,668 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752529761] [2019-11-07 00:40:05,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:06,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752529761] [2019-11-07 00:40:06,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443432726] [2019-11-07 00:40:06,337 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 00:40:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:06,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 3257 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:40:07,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:40:07,048 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:40:07,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:07,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:40:07,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346175674] [2019-11-07 00:40:07,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:40:07,470 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:40:07,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:07,487 INFO L87 Difference]: Start difference. First operand 766 states. Second operand 2 states. [2019-11-07 00:40:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:07,563 INFO L93 Difference]: Finished difference Result 649 states and 1033 transitions. [2019-11-07 00:40:07,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:40:07,564 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-11-07 00:40:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:07,595 INFO L225 Difference]: With dead ends: 649 [2019-11-07 00:40:07,595 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:40:07,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:40:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:40:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:40:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 978 transitions. [2019-11-07 00:40:07,736 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 978 transitions. Word has length 164 [2019-11-07 00:40:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:07,739 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 978 transitions. [2019-11-07 00:40:07,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:40:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 978 transitions. [2019-11-07 00:40:07,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 00:40:07,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:07,748 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:07,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:07,964 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:07,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2088381448, now seen corresponding path program 1 times [2019-11-07 00:40:07,965 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:07,965 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618072315] [2019-11-07 00:40:07,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:08,212 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618072315] [2019-11-07 00:40:08,212 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845404749] [2019-11-07 00:40:08,212 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 00:40:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:08,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 3260 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:08,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:08,980 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:09,281 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:09,281 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:09,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229277686] [2019-11-07 00:40:09,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:09,286 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:09,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:09,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:09,287 INFO L87 Difference]: Start difference. First operand 612 states and 978 transitions. Second operand 4 states. [2019-11-07 00:40:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:09,396 INFO L93 Difference]: Finished difference Result 1196 states and 1929 transitions. [2019-11-07 00:40:09,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:09,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-11-07 00:40:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:09,406 INFO L225 Difference]: With dead ends: 1196 [2019-11-07 00:40:09,407 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:40:09,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:09,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:40:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:40:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:40:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 977 transitions. [2019-11-07 00:40:09,468 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 977 transitions. Word has length 166 [2019-11-07 00:40:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:09,470 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 977 transitions. [2019-11-07 00:40:09,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 977 transitions. [2019-11-07 00:40:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-07 00:40:09,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:09,481 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:09,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:09,688 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2119485278, now seen corresponding path program 1 times [2019-11-07 00:40:09,689 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:09,690 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364065201] [2019-11-07 00:40:09,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:10,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364065201] [2019-11-07 00:40:10,235 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401254097] [2019-11-07 00:40:10,235 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 00:40:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:10,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 3262 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:10,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:10,874 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:11,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:11,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:11,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612872573] [2019-11-07 00:40:11,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:11,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:11,205 INFO L87 Difference]: Start difference. First operand 612 states and 977 transitions. Second operand 4 states. [2019-11-07 00:40:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:11,277 INFO L93 Difference]: Finished difference Result 1196 states and 1927 transitions. [2019-11-07 00:40:11,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:11,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-11-07 00:40:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:11,283 INFO L225 Difference]: With dead ends: 1196 [2019-11-07 00:40:11,283 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:40:11,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:40:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:40:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:40:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 976 transitions. [2019-11-07 00:40:11,315 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 976 transitions. Word has length 168 [2019-11-07 00:40:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:11,315 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 976 transitions. [2019-11-07 00:40:11,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 976 transitions. [2019-11-07 00:40:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:40:11,320 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:11,320 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:11,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:11,536 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1181326224, now seen corresponding path program 1 times [2019-11-07 00:40:11,537 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:11,537 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103138176] [2019-11-07 00:40:11,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:11,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103138176] [2019-11-07 00:40:11,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899214669] [2019-11-07 00:40:11,668 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 00:40:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:12,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:12,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:12,350 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:12,648 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:12,648 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:12,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689159414] [2019-11-07 00:40:12,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:12,649 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:12,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:12,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:12,650 INFO L87 Difference]: Start difference. First operand 612 states and 976 transitions. Second operand 4 states. [2019-11-07 00:40:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:12,735 INFO L93 Difference]: Finished difference Result 1203 states and 1934 transitions. [2019-11-07 00:40:12,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:12,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-11-07 00:40:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:12,741 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 00:40:12,741 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:40:12,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:40:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-11-07 00:40:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:40:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 988 transitions. [2019-11-07 00:40:12,770 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 988 transitions. Word has length 170 [2019-11-07 00:40:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:12,771 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 988 transitions. [2019-11-07 00:40:12,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 988 transitions. [2019-11-07 00:40:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:40:12,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:12,776 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:12,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:12,984 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1277638939, now seen corresponding path program 1 times [2019-11-07 00:40:12,985 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:12,985 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885926938] [2019-11-07 00:40:12,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:13,119 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885926938] [2019-11-07 00:40:13,119 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789797825] [2019-11-07 00:40:13,120 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 00:40:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:13,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:13,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:13,821 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:14,146 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:14,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:14,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660002868] [2019-11-07 00:40:14,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:14,153 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:14,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:14,154 INFO L87 Difference]: Start difference. First operand 621 states and 988 transitions. Second operand 4 states. [2019-11-07 00:40:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:14,259 INFO L93 Difference]: Finished difference Result 1205 states and 1935 transitions. [2019-11-07 00:40:14,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:14,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-11-07 00:40:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:14,269 INFO L225 Difference]: With dead ends: 1205 [2019-11-07 00:40:14,269 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:40:14,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:40:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-11-07 00:40:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:40:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 987 transitions. [2019-11-07 00:40:14,304 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 987 transitions. Word has length 171 [2019-11-07 00:40:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:14,305 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 987 transitions. [2019-11-07 00:40:14,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 987 transitions. [2019-11-07 00:40:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-07 00:40:14,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:14,313 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:14,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:14,533 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash 107661556, now seen corresponding path program 1 times [2019-11-07 00:40:14,534 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:14,534 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950449546] [2019-11-07 00:40:14,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:14,684 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950449546] [2019-11-07 00:40:14,684 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770462985] [2019-11-07 00:40:14,685 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 00:40:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:15,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:15,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:15,490 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:15,737 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:15,738 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:15,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31333181] [2019-11-07 00:40:15,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:15,740 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:15,741 INFO L87 Difference]: Start difference. First operand 621 states and 987 transitions. Second operand 4 states. [2019-11-07 00:40:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:15,837 INFO L93 Difference]: Finished difference Result 1205 states and 1934 transitions. [2019-11-07 00:40:15,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:15,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-11-07 00:40:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:15,845 INFO L225 Difference]: With dead ends: 1205 [2019-11-07 00:40:15,845 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:40:15,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 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 00:40:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:40:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-11-07 00:40:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:40:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 986 transitions. [2019-11-07 00:40:15,882 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 986 transitions. Word has length 172 [2019-11-07 00:40:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:15,885 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 986 transitions. [2019-11-07 00:40:15,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 986 transitions. [2019-11-07 00:40:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-07 00:40:15,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:15,893 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:16,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:16,105 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:16,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1662603201, now seen corresponding path program 1 times [2019-11-07 00:40:16,106 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:16,106 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861242769] [2019-11-07 00:40:16,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:16,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861242769] [2019-11-07 00:40:16,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188421722] [2019-11-07 00:40:16,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:17,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:17,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:17,131 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:17,388 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:17,388 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:40:17,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347622558] [2019-11-07 00:40:17,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:17,389 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:17,390 INFO L87 Difference]: Start difference. First operand 621 states and 986 transitions. Second operand 4 states. [2019-11-07 00:40:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:17,568 INFO L93 Difference]: Finished difference Result 1204 states and 1934 transitions. [2019-11-07 00:40:17,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:17,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-11-07 00:40:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:17,575 INFO L225 Difference]: With dead ends: 1204 [2019-11-07 00:40:17,575 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:40:17,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:40:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-11-07 00:40:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:40:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 981 transitions. [2019-11-07 00:40:17,606 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 981 transitions. Word has length 173 [2019-11-07 00:40:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:17,606 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 981 transitions. [2019-11-07 00:40:17,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 981 transitions. [2019-11-07 00:40:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-07 00:40:17,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:17,611 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:17,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:17,819 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:17,820 INFO L82 PathProgramCache]: Analyzing trace with hash 795903017, now seen corresponding path program 1 times [2019-11-07 00:40:17,821 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:17,821 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849997357] [2019-11-07 00:40:17,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:17,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849997357] [2019-11-07 00:40:17,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208237981] [2019-11-07 00:40:17,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:18,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:18,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:19,228 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:19,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:19,487 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:40:19,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586668369] [2019-11-07 00:40:19,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:19,488 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:19,489 INFO L87 Difference]: Start difference. First operand 621 states and 981 transitions. Second operand 4 states. [2019-11-07 00:40:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:19,641 INFO L93 Difference]: Finished difference Result 1204 states and 1924 transitions. [2019-11-07 00:40:19,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:19,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-11-07 00:40:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:19,648 INFO L225 Difference]: With dead ends: 1204 [2019-11-07 00:40:19,648 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:40:19,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:40:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-11-07 00:40:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:40:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 976 transitions. [2019-11-07 00:40:19,681 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 976 transitions. Word has length 175 [2019-11-07 00:40:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:19,682 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 976 transitions. [2019-11-07 00:40:19,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 976 transitions. [2019-11-07 00:40:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-07 00:40:19,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:19,690 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-11-07 00:40:19,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:19,900 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:19,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1292592075, now seen corresponding path program 1 times [2019-11-07 00:40:19,901 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:19,902 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215270778] [2019-11-07 00:40:19,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:20,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215270778] [2019-11-07 00:40:20,095 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845189701] [2019-11-07 00:40:20,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:20,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 3271 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:20,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:20,851 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:21,151 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:21,151 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:40:21,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275187336] [2019-11-07 00:40:21,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:21,152 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:21,153 INFO L87 Difference]: Start difference. First operand 621 states and 976 transitions. Second operand 4 states. [2019-11-07 00:40:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:21,356 INFO L93 Difference]: Finished difference Result 1240 states and 1973 transitions. [2019-11-07 00:40:21,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:21,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-11-07 00:40:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:21,362 INFO L225 Difference]: With dead ends: 1240 [2019-11-07 00:40:21,362 INFO L226 Difference]: Without dead ends: 660 [2019-11-07 00:40:21,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-11-07 00:40:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2019-11-07 00:40:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-11-07 00:40:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1040 transitions. [2019-11-07 00:40:21,389 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1040 transitions. Word has length 177 [2019-11-07 00:40:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:21,390 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1040 transitions. [2019-11-07 00:40:21,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1040 transitions. [2019-11-07 00:40:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 00:40:21,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:21,395 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:21,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:21,612 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:21,612 INFO L82 PathProgramCache]: Analyzing trace with hash 550468332, now seen corresponding path program 1 times [2019-11-07 00:40:21,613 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:21,613 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396428734] [2019-11-07 00:40:21,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:21,814 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396428734] [2019-11-07 00:40:21,814 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934337658] [2019-11-07 00:40:21,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:22,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:22,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:22,558 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:22,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:22,819 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:40:22,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427862498] [2019-11-07 00:40:22,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:22,820 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:22,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:22,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:22,821 INFO L87 Difference]: Start difference. First operand 660 states and 1040 transitions. Second operand 4 states. [2019-11-07 00:40:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:23,037 INFO L93 Difference]: Finished difference Result 1243 states and 1976 transitions. [2019-11-07 00:40:23,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:23,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-11-07 00:40:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:23,043 INFO L225 Difference]: With dead ends: 1243 [2019-11-07 00:40:23,043 INFO L226 Difference]: Without dead ends: 660 [2019-11-07 00:40:23,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-11-07 00:40:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2019-11-07 00:40:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-11-07 00:40:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1035 transitions. [2019-11-07 00:40:23,068 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1035 transitions. Word has length 178 [2019-11-07 00:40:23,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:23,068 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1035 transitions. [2019-11-07 00:40:23,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1035 transitions. [2019-11-07 00:40:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 00:40:23,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:23,073 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:23,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:23,282 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:23,282 INFO L82 PathProgramCache]: Analyzing trace with hash -231579797, now seen corresponding path program 1 times [2019-11-07 00:40:23,283 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:23,283 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959111605] [2019-11-07 00:40:23,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:23,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959111605] [2019-11-07 00:40:23,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452726638] [2019-11-07 00:40:23,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:24,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:24,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:40:24,449 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:24,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:40:24,999 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:25,000 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:40:25,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097693006] [2019-11-07 00:40:25,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:25,001 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:25,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:25,002 INFO L87 Difference]: Start difference. First operand 660 states and 1035 transitions. Second operand 9 states. [2019-11-07 00:40:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:25,228 INFO L93 Difference]: Finished difference Result 1256 states and 1990 transitions. [2019-11-07 00:40:25,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:25,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-11-07 00:40:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:25,237 INFO L225 Difference]: With dead ends: 1256 [2019-11-07 00:40:25,238 INFO L226 Difference]: Without dead ends: 676 [2019-11-07 00:40:25,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2019-11-07 00:40:25,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 669. [2019-11-07 00:40:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2019-11-07 00:40:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1048 transitions. [2019-11-07 00:40:25,270 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1048 transitions. Word has length 178 [2019-11-07 00:40:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:25,270 INFO L462 AbstractCegarLoop]: Abstraction has 669 states and 1048 transitions. [2019-11-07 00:40:25,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1048 transitions. [2019-11-07 00:40:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 00:40:25,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:25,275 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:25,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:25,482 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:25,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1645689098, now seen corresponding path program 1 times [2019-11-07 00:40:25,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:25,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155847672] [2019-11-07 00:40:25,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:25,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155847672] [2019-11-07 00:40:25,612 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961447758] [2019-11-07 00:40:25,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:26,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:26,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:26,457 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:26,849 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:26,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:40:26,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878825761] [2019-11-07 00:40:26,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:26,851 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:26,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:26,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:26,851 INFO L87 Difference]: Start difference. First operand 669 states and 1048 transitions. Second operand 11 states. [2019-11-07 00:40:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:27,002 INFO L93 Difference]: Finished difference Result 1194 states and 1892 transitions. [2019-11-07 00:40:27,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:40:27,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 178 [2019-11-07 00:40:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:27,007 INFO L225 Difference]: With dead ends: 1194 [2019-11-07 00:40:27,007 INFO L226 Difference]: Without dead ends: 686 [2019-11-07 00:40:27,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2019-11-07 00:40:27,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 676. [2019-11-07 00:40:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-11-07 00:40:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1058 transitions. [2019-11-07 00:40:27,033 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1058 transitions. Word has length 178 [2019-11-07 00:40:27,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:27,034 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 1058 transitions. [2019-11-07 00:40:27,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1058 transitions. [2019-11-07 00:40:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 00:40:27,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:27,039 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:27,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:27,248 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2079475670, now seen corresponding path program 1 times [2019-11-07 00:40:27,249 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:27,249 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384203180] [2019-11-07 00:40:27,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:40:27,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384203180] [2019-11-07 00:40:27,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446831518] [2019-11-07 00:40:27,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:28,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:28,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:28,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:40:28,540 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:28,540 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:40:28,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786219650] [2019-11-07 00:40:28,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:40:28,541 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:28,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:40:28,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:28,542 INFO L87 Difference]: Start difference. First operand 676 states and 1058 transitions. Second operand 8 states. [2019-11-07 00:40:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:28,673 INFO L93 Difference]: Finished difference Result 1198 states and 1901 transitions. [2019-11-07 00:40:28,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:28,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 179 [2019-11-07 00:40:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:28,679 INFO L225 Difference]: With dead ends: 1198 [2019-11-07 00:40:28,679 INFO L226 Difference]: Without dead ends: 690 [2019-11-07 00:40:28,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 349 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-11-07 00:40:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 683. [2019-11-07 00:40:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-11-07 00:40:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1069 transitions. [2019-11-07 00:40:28,714 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1069 transitions. Word has length 179 [2019-11-07 00:40:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:28,715 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1069 transitions. [2019-11-07 00:40:28,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:40:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1069 transitions. [2019-11-07 00:40:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 00:40:28,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:28,723 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-07 00:40:28,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:28,936 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:28,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2072147030, now seen corresponding path program 1 times [2019-11-07 00:40:28,937 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:28,937 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266193106] [2019-11-07 00:40:28,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:40:29,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266193106] [2019-11-07 00:40:29,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93484896] [2019-11-07 00:40:29,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:29,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:29,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:40:29,966 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:30,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:40:30,568 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:30,568 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:40:30,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144663755] [2019-11-07 00:40:30,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:40:30,569 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:40:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:30,570 INFO L87 Difference]: Start difference. First operand 683 states and 1069 transitions. Second operand 14 states. [2019-11-07 00:40:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:30,805 INFO L93 Difference]: Finished difference Result 1199 states and 1901 transitions. [2019-11-07 00:40:30,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:40:30,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 179 [2019-11-07 00:40:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:30,811 INFO L225 Difference]: With dead ends: 1199 [2019-11-07 00:40:30,811 INFO L226 Difference]: Without dead ends: 691 [2019-11-07 00:40:30,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2019-11-07 00:40:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 683. [2019-11-07 00:40:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-11-07 00:40:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1069 transitions. [2019-11-07 00:40:30,840 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1069 transitions. Word has length 179 [2019-11-07 00:40:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:30,842 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1069 transitions. [2019-11-07 00:40:30,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:40:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1069 transitions. [2019-11-07 00:40:30,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-07 00:40:30,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:30,847 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:31,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:31,055 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:31,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:31,055 INFO L82 PathProgramCache]: Analyzing trace with hash -17267335, now seen corresponding path program 1 times [2019-11-07 00:40:31,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:31,056 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309071422] [2019-11-07 00:40:31,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:40:31,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309071422] [2019-11-07 00:40:31,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117196923] [2019-11-07 00:40:31,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:32,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:32,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:40:32,108 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:32,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:40:32,583 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:32,583 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:40:32,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938180649] [2019-11-07 00:40:32,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:32,584 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:32,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:32,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:32,585 INFO L87 Difference]: Start difference. First operand 683 states and 1069 transitions. Second operand 11 states. [2019-11-07 00:40:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:32,758 INFO L93 Difference]: Finished difference Result 1200 states and 1909 transitions. [2019-11-07 00:40:32,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:32,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 180 [2019-11-07 00:40:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:32,763 INFO L225 Difference]: With dead ends: 1200 [2019-11-07 00:40:32,763 INFO L226 Difference]: Without dead ends: 692 [2019-11-07 00:40:32,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 347 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-11-07 00:40:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 685. [2019-11-07 00:40:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-11-07 00:40:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1075 transitions. [2019-11-07 00:40:32,788 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1075 transitions. Word has length 180 [2019-11-07 00:40:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:32,788 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1075 transitions. [2019-11-07 00:40:32,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1075 transitions. [2019-11-07 00:40:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-07 00:40:32,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:32,793 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:33,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:33,001 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:33,001 INFO L82 PathProgramCache]: Analyzing trace with hash -492976219, now seen corresponding path program 1 times [2019-11-07 00:40:33,002 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:33,002 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597218744] [2019-11-07 00:40:33,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:40:33,119 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597218744] [2019-11-07 00:40:33,119 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321644665] [2019-11-07 00:40:33,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:34,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:40:34,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:34,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:34,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:34,498 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:34,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-11-07 00:40:34,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510479208] [2019-11-07 00:40:34,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:34,499 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:34,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:34,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:34,500 INFO L87 Difference]: Start difference. First operand 685 states and 1075 transitions. Second operand 9 states. [2019-11-07 00:40:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:34,627 INFO L93 Difference]: Finished difference Result 1296 states and 2074 transitions. [2019-11-07 00:40:34,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:34,627 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 181 [2019-11-07 00:40:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:34,632 INFO L225 Difference]: With dead ends: 1296 [2019-11-07 00:40:34,632 INFO L226 Difference]: Without dead ends: 694 [2019-11-07 00:40:34,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 356 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2019-11-07 00:40:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 692. [2019-11-07 00:40:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2019-11-07 00:40:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1083 transitions. [2019-11-07 00:40:34,666 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1083 transitions. Word has length 181 [2019-11-07 00:40:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:34,666 INFO L462 AbstractCegarLoop]: Abstraction has 692 states and 1083 transitions. [2019-11-07 00:40:34,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1083 transitions. [2019-11-07 00:40:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-07 00:40:34,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:34,671 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:34,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:34,880 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:34,881 INFO L82 PathProgramCache]: Analyzing trace with hash -474601058, now seen corresponding path program 1 times [2019-11-07 00:40:34,881 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:34,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644304314] [2019-11-07 00:40:34,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:40:35,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644304314] [2019-11-07 00:40:35,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95483519] [2019-11-07 00:40:35,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:35,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:40:35,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:40:36,010 INFO L321 TraceCheckSpWp]: Computing backward predicates...