/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_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:41:14,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:41:14,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:41:14,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:41:14,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:41:14,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:41:14,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:41:14,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:41:14,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:41:14,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:41:14,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:41:14,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:41:14,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:41:14,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:41:14,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:41:14,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:41:14,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:41:14,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:41:14,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:41:14,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:41:14,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:41:14,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:41:14,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:41:14,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:41:14,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:41:14,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:41:14,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:41:14,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:41:14,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:41:14,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:41:14,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:41:14,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:41:14,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:41:14,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:41:14,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:41:14,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:41:14,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:41:14,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:41:14,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:41:14,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:41:14,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:41:14,919 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 00:41:14,939 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:41:14,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:41:14,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:41:14,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:41:14,942 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:41:14,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:41:14,942 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:41:14,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:41:14,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:41:14,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:41:14,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:41:14,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:41:14,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:41:14,945 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:41:14,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:41:14,945 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:41:14,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:41:14,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:41:14,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:41:14,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:41:14,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:41:14,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:41:14,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:41:14,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:41:14,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:41:14,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:41:14,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:41:14,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:41:14,948 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 00:41:15,208 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:41:15,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:41:15,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:41:15,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:41:15,231 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:41:15,232 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product32.cil.c [2019-11-07 00:41:15,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f278ee7/3da2aec98cc84ca0b8200208659c6bed/FLAG2bcb440b8 [2019-11-07 00:41:15,994 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:41:15,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product32.cil.c [2019-11-07 00:41:16,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f278ee7/3da2aec98cc84ca0b8200208659c6bed/FLAG2bcb440b8 [2019-11-07 00:41:16,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f278ee7/3da2aec98cc84ca0b8200208659c6bed [2019-11-07 00:41:16,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:41:16,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:41:16,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:41:16,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:41:16,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:41:16,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:16" (1/1) ... [2019-11-07 00:41:16,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7b20b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:16, skipping insertion in model container [2019-11-07 00:41:16,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:16" (1/1) ... [2019-11-07 00:41:16,161 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:41:16,250 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:41:16,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:41:16,987 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:41:17,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:41:17,282 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:41:17,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17 WrapperNode [2019-11-07 00:41:17,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:41:17,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:41:17,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:41:17,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:41:17,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (1/1) ... [2019-11-07 00:41:17,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (1/1) ... [2019-11-07 00:41:17,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (1/1) ... [2019-11-07 00:41:17,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (1/1) ... [2019-11-07 00:41:17,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (1/1) ... [2019-11-07 00:41:17,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (1/1) ... [2019-11-07 00:41:17,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (1/1) ... [2019-11-07 00:41:17,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:41:17,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:41:17,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:41:17,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:41:17,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (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 00:41:17,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:41:17,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:41:17,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:41:17,631 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:41:17,631 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:41:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:41:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:41:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:41:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:41:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:41:17,635 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:41:17,635 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:41:17,635 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:41:17,636 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:41:17,637 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:41:17,637 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:41:17,640 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:41:17,640 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:41:17,640 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:41:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:41:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:41:17,641 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:41:17,642 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:41:17,642 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:41:17,642 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:41:17,643 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:41:17,643 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:41:17,643 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:41:17,643 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:41:17,644 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:41:17,644 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:41:17,644 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:41:17,645 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:41:17,645 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:41:17,645 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:41:17,646 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-11-07 00:41:17,646 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:41:17,646 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-11-07 00:41:17,647 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:41:17,647 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:41:17,647 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:41:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:41:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:41:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:41:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:41:17,649 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:41:17,649 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:41:17,649 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:41:17,649 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:41:17,650 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:41:17,650 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:41:17,651 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:41:17,651 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:41:17,651 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:41:17,652 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:41:17,652 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:41:17,652 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:41:17,652 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:41:17,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:41:17,653 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:41:17,653 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:41:17,653 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:41:17,654 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:41:17,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:41:17,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:41:17,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:41:17,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:41:17,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:41:17,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:41:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:41:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:41:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:41:17,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:41:17,659 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:41:17,659 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:41:17,659 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:41:17,660 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:41:17,660 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:41:17,660 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:41:17,661 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:41:17,661 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:41:17,662 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:41:17,662 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:41:17,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:41:17,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:41:17,664 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:41:17,664 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:41:17,664 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:41:17,664 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:41:17,664 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:41:17,665 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:41:17,665 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:41:17,665 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:41:17,665 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:41:17,666 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:41:17,666 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:41:17,666 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:41:17,666 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:41:17,666 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:41:17,667 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:41:17,667 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:41:17,667 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:41:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:41:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:41:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:41:17,668 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:41:17,669 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:41:17,669 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:41:17,669 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:41:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:41:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:41:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:41:17,670 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:41:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:41:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:41:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:41:17,671 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:41:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:41:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:41:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:41:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:41:17,672 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:41:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:41:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:41:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:41:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:41:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:41:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:41:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:41:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:41:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:41:17,675 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-11-07 00:41:17,675 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:41:17,675 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-11-07 00:41:17,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:41:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:41:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:41:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:41:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:41:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:41:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:41:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:41:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:41:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:41:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:41:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:41:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:41:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:41:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:41:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:41:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:41:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:41:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:41:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:41:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:41:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:41:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:41:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:41:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:41:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:41:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:41:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:41:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:41:17,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:41:17,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:41:17,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:41:17,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:41:17,681 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:41:17,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:41:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:41:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:41:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:41:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:41:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:41:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:41:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:41:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:41:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:41:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:41:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:41:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:41:20,103 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:41:20,104 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:41:20,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:20 BoogieIcfgContainer [2019-11-07 00:41:20,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:41:20,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:41:20,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:41:20,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:41:20,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:41:16" (1/3) ... [2019-11-07 00:41:20,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:20, skipping insertion in model container [2019-11-07 00:41:20,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:17" (2/3) ... [2019-11-07 00:41:20,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:20, skipping insertion in model container [2019-11-07 00:41:20,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:20" (3/3) ... [2019-11-07 00:41:20,115 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2019-11-07 00:41:20,126 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:41:20,136 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:41:20,151 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:41:20,184 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:41:20,184 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:41:20,184 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:41:20,185 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:41:20,185 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:41:20,185 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:41:20,185 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:41:20,185 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:41:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states. [2019-11-07 00:41:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 00:41:20,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:20,241 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:20,243 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash 56445338, now seen corresponding path program 1 times [2019-11-07 00:41:20,263 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:20,263 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480973774] [2019-11-07 00:41:20,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:20,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480973774] [2019-11-07 00:41:20,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876416918] [2019-11-07 00:41:20,939 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 00:41:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:21,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:41:21,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:21,762 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:21,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:21,980 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:41:21,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951147199] [2019-11-07 00:41:21,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:41:21,991 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:41:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:41:22,007 INFO L87 Difference]: Start difference. First operand 834 states. Second operand 2 states. [2019-11-07 00:41:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:22,139 INFO L93 Difference]: Finished difference Result 710 states and 1117 transitions. [2019-11-07 00:41:22,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:41:22,142 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-11-07 00:41:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:22,186 INFO L225 Difference]: With dead ends: 710 [2019-11-07 00:41:22,186 INFO L226 Difference]: Without dead ends: 673 [2019-11-07 00:41:22,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 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 00:41:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-11-07 00:41:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-11-07 00:41:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-11-07 00:41:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1062 transitions. [2019-11-07 00:41:22,331 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1062 transitions. Word has length 116 [2019-11-07 00:41:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:22,334 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1062 transitions. [2019-11-07 00:41:22,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:41:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1062 transitions. [2019-11-07 00:41:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 00:41:22,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:22,342 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:22,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:22,558 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1775152457, now seen corresponding path program 1 times [2019-11-07 00:41:22,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:22,559 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684788167] [2019-11-07 00:41:22,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:22,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684788167] [2019-11-07 00:41:22,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91135385] [2019-11-07 00:41:22,869 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 00:41:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:23,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:23,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:23,568 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:23,825 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:23,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:23,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652297405] [2019-11-07 00:41:23,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:23,828 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:23,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:23,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:23,829 INFO L87 Difference]: Start difference. First operand 673 states and 1062 transitions. Second operand 4 states. [2019-11-07 00:41:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:23,963 INFO L93 Difference]: Finished difference Result 1318 states and 2097 transitions. [2019-11-07 00:41:23,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:23,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-11-07 00:41:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:23,973 INFO L225 Difference]: With dead ends: 1318 [2019-11-07 00:41:23,974 INFO L226 Difference]: Without dead ends: 673 [2019-11-07 00:41:23,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 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 00:41:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-11-07 00:41:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-11-07 00:41:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-11-07 00:41:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1061 transitions. [2019-11-07 00:41:24,054 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1061 transitions. Word has length 118 [2019-11-07 00:41:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:24,055 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1061 transitions. [2019-11-07 00:41:24,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1061 transitions. [2019-11-07 00:41:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 00:41:24,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:24,063 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:24,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:24,279 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1168672533, now seen corresponding path program 1 times [2019-11-07 00:41:24,280 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:24,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929869975] [2019-11-07 00:41:24,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:24,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929869975] [2019-11-07 00:41:24,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854543034] [2019-11-07 00:41:24,458 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 00:41:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:25,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:25,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:25,140 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:25,350 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:25,351 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:25,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620005088] [2019-11-07 00:41:25,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:25,352 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:25,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:25,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:25,353 INFO L87 Difference]: Start difference. First operand 673 states and 1061 transitions. Second operand 4 states. [2019-11-07 00:41:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:25,453 INFO L93 Difference]: Finished difference Result 1318 states and 2095 transitions. [2019-11-07 00:41:25,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:25,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-11-07 00:41:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:25,459 INFO L225 Difference]: With dead ends: 1318 [2019-11-07 00:41:25,459 INFO L226 Difference]: Without dead ends: 673 [2019-11-07 00:41:25,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 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 00:41:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-11-07 00:41:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-11-07 00:41:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-11-07 00:41:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1060 transitions. [2019-11-07 00:41:25,489 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1060 transitions. Word has length 120 [2019-11-07 00:41:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:25,490 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1060 transitions. [2019-11-07 00:41:25,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1060 transitions. [2019-11-07 00:41:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-07 00:41:25,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:25,492 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:25,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:25,701 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:25,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:25,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2048084753, now seen corresponding path program 1 times [2019-11-07 00:41:25,702 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:25,702 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68938241] [2019-11-07 00:41:25,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:25,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68938241] [2019-11-07 00:41:25,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391925890] [2019-11-07 00:41:25,887 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 00:41:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:26,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:26,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:26,615 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:26,804 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:26,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:26,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216622737] [2019-11-07 00:41:26,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:26,806 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:26,807 INFO L87 Difference]: Start difference. First operand 673 states and 1060 transitions. Second operand 4 states. [2019-11-07 00:41:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:26,884 INFO L93 Difference]: Finished difference Result 1325 states and 2102 transitions. [2019-11-07 00:41:26,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:26,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-11-07 00:41:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:26,893 INFO L225 Difference]: With dead ends: 1325 [2019-11-07 00:41:26,894 INFO L226 Difference]: Without dead ends: 682 [2019-11-07 00:41:26,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 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 00:41:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-07 00:41:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-07 00:41:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-07 00:41:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1072 transitions. [2019-11-07 00:41:26,939 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1072 transitions. Word has length 122 [2019-11-07 00:41:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:26,940 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1072 transitions. [2019-11-07 00:41:26,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1072 transitions. [2019-11-07 00:41:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:41:26,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:26,943 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:27,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:27,151 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -712971393, now seen corresponding path program 1 times [2019-11-07 00:41:27,153 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:27,153 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027123064] [2019-11-07 00:41:27,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:27,281 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027123064] [2019-11-07 00:41:27,281 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987031413] [2019-11-07 00:41:27,281 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 00:41:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:27,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:27,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:27,918 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:28,113 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:28,113 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:28,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487133923] [2019-11-07 00:41:28,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:28,115 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:28,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:28,115 INFO L87 Difference]: Start difference. First operand 682 states and 1072 transitions. Second operand 4 states. [2019-11-07 00:41:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:28,194 INFO L93 Difference]: Finished difference Result 1327 states and 2103 transitions. [2019-11-07 00:41:28,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:28,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-11-07 00:41:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:28,200 INFO L225 Difference]: With dead ends: 1327 [2019-11-07 00:41:28,200 INFO L226 Difference]: Without dead ends: 682 [2019-11-07 00:41:28,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 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 00:41:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-07 00:41:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-07 00:41:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-07 00:41:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1071 transitions. [2019-11-07 00:41:28,227 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1071 transitions. Word has length 123 [2019-11-07 00:41:28,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:28,227 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1071 transitions. [2019-11-07 00:41:28,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1071 transitions. [2019-11-07 00:41:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 00:41:28,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:28,230 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:28,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:28,438 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:28,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1947833131, now seen corresponding path program 1 times [2019-11-07 00:41:28,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:28,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359816568] [2019-11-07 00:41:28,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:28,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359816568] [2019-11-07 00:41:28,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258981560] [2019-11-07 00:41:28,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:41:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:29,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:29,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:29,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:29,429 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:29,430 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:41:29,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992988214] [2019-11-07 00:41:29,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:29,431 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:29,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:41:29,431 INFO L87 Difference]: Start difference. First operand 682 states and 1071 transitions. Second operand 4 states. [2019-11-07 00:41:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:29,504 INFO L93 Difference]: Finished difference Result 1327 states and 2102 transitions. [2019-11-07 00:41:29,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:29,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-11-07 00:41:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:29,510 INFO L225 Difference]: With dead ends: 1327 [2019-11-07 00:41:29,510 INFO L226 Difference]: Without dead ends: 682 [2019-11-07 00:41:29,514 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 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 00:41:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-07 00:41:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-07 00:41:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-07 00:41:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1070 transitions. [2019-11-07 00:41:29,541 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1070 transitions. Word has length 124 [2019-11-07 00:41:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:29,542 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1070 transitions. [2019-11-07 00:41:29,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1070 transitions. [2019-11-07 00:41:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 00:41:29,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:29,544 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:29,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:29,753 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1179658819, now seen corresponding path program 1 times [2019-11-07 00:41:29,753 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:29,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461257889] [2019-11-07 00:41:29,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:29,961 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461257889] [2019-11-07 00:41:29,961 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60660938] [2019-11-07 00:41:29,962 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 00:41:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:30,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:30,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:31,004 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:31,205 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:31,206 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:31,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244051689] [2019-11-07 00:41:31,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:31,207 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:31,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:31,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:31,208 INFO L87 Difference]: Start difference. First operand 682 states and 1070 transitions. Second operand 4 states. [2019-11-07 00:41:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:31,400 INFO L93 Difference]: Finished difference Result 1326 states and 2102 transitions. [2019-11-07 00:41:31,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:31,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-11-07 00:41:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:31,405 INFO L225 Difference]: With dead ends: 1326 [2019-11-07 00:41:31,406 INFO L226 Difference]: Without dead ends: 682 [2019-11-07 00:41:31,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 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 00:41:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-07 00:41:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-07 00:41:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-07 00:41:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1065 transitions. [2019-11-07 00:41:31,437 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1065 transitions. Word has length 125 [2019-11-07 00:41:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:31,437 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1065 transitions. [2019-11-07 00:41:31,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1065 transitions. [2019-11-07 00:41:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-07 00:41:31,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:31,440 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:31,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:31,647 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1513989099, now seen corresponding path program 1 times [2019-11-07 00:41:31,649 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:31,649 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924475120] [2019-11-07 00:41:31,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:31,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924475120] [2019-11-07 00:41:31,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35384090] [2019-11-07 00:41:31,818 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 00:41:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:32,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:32,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:32,824 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:33,049 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:33,050 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:33,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551652177] [2019-11-07 00:41:33,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:33,053 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:33,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:33,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:33,053 INFO L87 Difference]: Start difference. First operand 682 states and 1065 transitions. Second operand 4 states. [2019-11-07 00:41:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:33,198 INFO L93 Difference]: Finished difference Result 1326 states and 2092 transitions. [2019-11-07 00:41:33,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:33,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-11-07 00:41:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:33,204 INFO L225 Difference]: With dead ends: 1326 [2019-11-07 00:41:33,205 INFO L226 Difference]: Without dead ends: 682 [2019-11-07 00:41:33,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 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 00:41:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-07 00:41:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-07 00:41:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-07 00:41:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1060 transitions. [2019-11-07 00:41:33,233 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1060 transitions. Word has length 127 [2019-11-07 00:41:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:33,233 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1060 transitions. [2019-11-07 00:41:33,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1060 transitions. [2019-11-07 00:41:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-07 00:41:33,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:33,236 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:33,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:33,444 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:33,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:33,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1252577017, now seen corresponding path program 1 times [2019-11-07 00:41:33,445 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:33,445 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651143018] [2019-11-07 00:41:33,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:33,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651143018] [2019-11-07 00:41:33,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688942034] [2019-11-07 00:41:33,596 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 00:41:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:34,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:34,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:34,504 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:34,773 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:34,773 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:34,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287236929] [2019-11-07 00:41:34,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:34,774 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:34,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:34,775 INFO L87 Difference]: Start difference. First operand 682 states and 1060 transitions. Second operand 4 states. [2019-11-07 00:41:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:35,014 INFO L93 Difference]: Finished difference Result 1362 states and 2141 transitions. [2019-11-07 00:41:35,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:35,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-11-07 00:41:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:35,020 INFO L225 Difference]: With dead ends: 1362 [2019-11-07 00:41:35,020 INFO L226 Difference]: Without dead ends: 721 [2019-11-07 00:41:35,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 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 00:41:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-11-07 00:41:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-11-07 00:41:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-11-07 00:41:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1124 transitions. [2019-11-07 00:41:35,048 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1124 transitions. Word has length 129 [2019-11-07 00:41:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:35,048 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1124 transitions. [2019-11-07 00:41:35,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1124 transitions. [2019-11-07 00:41:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:41:35,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:35,051 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:35,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:35,267 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:35,267 INFO L82 PathProgramCache]: Analyzing trace with hash -402045729, now seen corresponding path program 1 times [2019-11-07 00:41:35,267 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:35,267 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979222454] [2019-11-07 00:41:35,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:35,545 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979222454] [2019-11-07 00:41:35,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462036171] [2019-11-07 00:41:35,546 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 00:41:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:36,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:36,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:36,266 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:36,464 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:36,464 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:36,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103326967] [2019-11-07 00:41:36,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:36,465 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:36,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:36,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:36,466 INFO L87 Difference]: Start difference. First operand 721 states and 1124 transitions. Second operand 4 states. [2019-11-07 00:41:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:36,671 INFO L93 Difference]: Finished difference Result 1365 states and 2144 transitions. [2019-11-07 00:41:36,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:36,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-11-07 00:41:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:36,676 INFO L225 Difference]: With dead ends: 1365 [2019-11-07 00:41:36,677 INFO L226 Difference]: Without dead ends: 721 [2019-11-07 00:41:36,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-11-07 00:41:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-11-07 00:41:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-11-07 00:41:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1119 transitions. [2019-11-07 00:41:36,708 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1119 transitions. Word has length 130 [2019-11-07 00:41:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:36,710 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1119 transitions. [2019-11-07 00:41:36,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1119 transitions. [2019-11-07 00:41:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:41:36,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:36,712 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:36,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:36,927 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:36,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1281147742, now seen corresponding path program 1 times [2019-11-07 00:41:36,928 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:36,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686350449] [2019-11-07 00:41:36,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:37,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686350449] [2019-11-07 00:41:37,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570651454] [2019-11-07 00:41:37,052 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 00:41:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:37,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:37,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:37,888 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:38,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:38,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:38,371 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:41:38,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685492151] [2019-11-07 00:41:38,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:41:38,372 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:38,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:41:38,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:41:38,372 INFO L87 Difference]: Start difference. First operand 721 states and 1119 transitions. Second operand 9 states. [2019-11-07 00:41:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:38,622 INFO L93 Difference]: Finished difference Result 1378 states and 2158 transitions. [2019-11-07 00:41:38,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:41:38,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-11-07 00:41:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:38,628 INFO L225 Difference]: With dead ends: 1378 [2019-11-07 00:41:38,628 INFO L226 Difference]: Without dead ends: 737 [2019-11-07 00:41:38,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 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 00:41:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-11-07 00:41:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 730. [2019-11-07 00:41:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2019-11-07 00:41:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1132 transitions. [2019-11-07 00:41:38,658 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1132 transitions. Word has length 130 [2019-11-07 00:41:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:38,659 INFO L462 AbstractCegarLoop]: Abstraction has 730 states and 1132 transitions. [2019-11-07 00:41:38,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:41:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1132 transitions. [2019-11-07 00:41:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 00:41:38,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:38,662 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:38,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:38,869 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2030394411, now seen corresponding path program 1 times [2019-11-07 00:41:38,870 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:38,870 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262550435] [2019-11-07 00:41:38,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:38,984 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262550435] [2019-11-07 00:41:38,984 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122983279] [2019-11-07 00:41:38,985 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 00:41:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:39,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:39,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:39,804 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:40,026 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:40,026 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:41:40,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521582266] [2019-11-07 00:41:40,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:40,029 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:41:40,030 INFO L87 Difference]: Start difference. First operand 730 states and 1132 transitions. Second operand 4 states. [2019-11-07 00:41:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:40,273 INFO L93 Difference]: Finished difference Result 1379 states and 2161 transitions. [2019-11-07 00:41:40,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:40,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-11-07 00:41:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:40,281 INFO L225 Difference]: With dead ends: 1379 [2019-11-07 00:41:40,281 INFO L226 Difference]: Without dead ends: 730 [2019-11-07 00:41:40,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2019-11-07 00:41:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2019-11-07 00:41:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2019-11-07 00:41:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1127 transitions. [2019-11-07 00:41:40,334 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1127 transitions. Word has length 131 [2019-11-07 00:41:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:40,336 INFO L462 AbstractCegarLoop]: Abstraction has 730 states and 1127 transitions. [2019-11-07 00:41:40,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1127 transitions. [2019-11-07 00:41:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:41:40,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:40,341 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:40,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:40,550 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash 471660285, now seen corresponding path program 1 times [2019-11-07 00:41:40,551 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:40,551 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786452992] [2019-11-07 00:41:40,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:40,651 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786452992] [2019-11-07 00:41:40,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998368321] [2019-11-07 00:41:40,652 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 00:41:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:41,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:41:41,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:41,429 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:41,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:41,727 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:41:41,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052621968] [2019-11-07 00:41:41,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:41:41,728 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:41:41,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:41:41,729 INFO L87 Difference]: Start difference. First operand 730 states and 1127 transitions. Second operand 11 states. [2019-11-07 00:41:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:41,880 INFO L93 Difference]: Finished difference Result 1316 states and 2055 transitions. [2019-11-07 00:41:41,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:41:41,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-11-07 00:41:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:41,886 INFO L225 Difference]: With dead ends: 1316 [2019-11-07 00:41:41,886 INFO L226 Difference]: Without dead ends: 747 [2019-11-07 00:41:41,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 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 00:41:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2019-11-07 00:41:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 737. [2019-11-07 00:41:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2019-11-07 00:41:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1137 transitions. [2019-11-07 00:41:41,924 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1137 transitions. Word has length 130 [2019-11-07 00:41:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:41,925 INFO L462 AbstractCegarLoop]: Abstraction has 737 states and 1137 transitions. [2019-11-07 00:41:41,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:41:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1137 transitions. [2019-11-07 00:41:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:41:41,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:41,928 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:42,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:42,138 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:42,139 INFO L82 PathProgramCache]: Analyzing trace with hash -542214372, now seen corresponding path program 1 times [2019-11-07 00:41:42,139 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:42,139 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878008678] [2019-11-07 00:41:42,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:42,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878008678] [2019-11-07 00:41:42,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768614816] [2019-11-07 00:41:42,236 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 00:41:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:43,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:41:43,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:43,046 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:43,390 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:43,390 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:41:43,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262204786] [2019-11-07 00:41:43,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:41:43,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:43,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:41:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:41:43,393 INFO L87 Difference]: Start difference. First operand 737 states and 1137 transitions. Second operand 8 states. [2019-11-07 00:41:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:43,541 INFO L93 Difference]: Finished difference Result 1320 states and 2064 transitions. [2019-11-07 00:41:43,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:43,542 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2019-11-07 00:41:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:43,547 INFO L225 Difference]: With dead ends: 1320 [2019-11-07 00:41:43,548 INFO L226 Difference]: Without dead ends: 751 [2019-11-07 00:41:43,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 257 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 00:41:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2019-11-07 00:41:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 744. [2019-11-07 00:41:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-11-07 00:41:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1148 transitions. [2019-11-07 00:41:43,582 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1148 transitions. Word has length 133 [2019-11-07 00:41:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:43,583 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 1148 transitions. [2019-11-07 00:41:43,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:41:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1148 transitions. [2019-11-07 00:41:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:41:43,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:43,585 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:43,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:43,794 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:43,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1768114844, now seen corresponding path program 1 times [2019-11-07 00:41:43,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:43,795 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653132739] [2019-11-07 00:41:43,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:43,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653132739] [2019-11-07 00:41:43,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987365301] [2019-11-07 00:41:43,915 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 00:41:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:44,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:44,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:44,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:45,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:45,295 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:45,295 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:41:45,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536530225] [2019-11-07 00:41:45,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:41:45,297 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:41:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:41:45,297 INFO L87 Difference]: Start difference. First operand 744 states and 1148 transitions. Second operand 14 states. [2019-11-07 00:41:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:45,572 INFO L93 Difference]: Finished difference Result 1321 states and 2064 transitions. [2019-11-07 00:41:45,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:41:45,573 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-11-07 00:41:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:45,580 INFO L225 Difference]: With dead ends: 1321 [2019-11-07 00:41:45,580 INFO L226 Difference]: Without dead ends: 752 [2019-11-07 00:41:45,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 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 00:41:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-11-07 00:41:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 744. [2019-11-07 00:41:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-11-07 00:41:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1148 transitions. [2019-11-07 00:41:45,625 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1148 transitions. Word has length 133 [2019-11-07 00:41:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:45,627 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 1148 transitions. [2019-11-07 00:41:45,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:41:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1148 transitions. [2019-11-07 00:41:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-07 00:41:45,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:45,630 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:45,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:45,838 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1440813212, now seen corresponding path program 1 times [2019-11-07 00:41:45,838 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:45,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826916908] [2019-11-07 00:41:45,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:45,931 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826916908] [2019-11-07 00:41:45,931 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210683861] [2019-11-07 00:41:45,932 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 00:41:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:46,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:46,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:46,767 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:47,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:47,228 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:47,228 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:41:47,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062073256] [2019-11-07 00:41:47,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:41:47,229 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:47,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:41:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:41:47,230 INFO L87 Difference]: Start difference. First operand 744 states and 1148 transitions. Second operand 11 states. [2019-11-07 00:41:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:47,423 INFO L93 Difference]: Finished difference Result 1322 states and 2072 transitions. [2019-11-07 00:41:47,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:41:47,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-11-07 00:41:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:47,429 INFO L225 Difference]: With dead ends: 1322 [2019-11-07 00:41:47,430 INFO L226 Difference]: Without dead ends: 753 [2019-11-07 00:41:47,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 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 00:41:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2019-11-07 00:41:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 746. [2019-11-07 00:41:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-11-07 00:41:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1154 transitions. [2019-11-07 00:41:47,464 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1154 transitions. Word has length 134 [2019-11-07 00:41:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:47,464 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1154 transitions. [2019-11-07 00:41:47,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:41:47,464 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1154 transitions. [2019-11-07 00:41:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:41:47,467 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:47,467 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:47,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:47,675 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:47,676 INFO L82 PathProgramCache]: Analyzing trace with hash -830897423, now seen corresponding path program 1 times [2019-11-07 00:41:47,676 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:47,676 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119537527] [2019-11-07 00:41:47,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:47,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119537527] [2019-11-07 00:41:47,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802286283] [2019-11-07 00:41:47,758 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 00:41:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:48,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:41:48,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:48,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:48,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:48,893 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:48,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-11-07 00:41:48,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316748066] [2019-11-07 00:41:48,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:41:48,894 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:48,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:41:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:41:48,895 INFO L87 Difference]: Start difference. First operand 746 states and 1154 transitions. Second operand 9 states. [2019-11-07 00:41:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:49,029 INFO L93 Difference]: Finished difference Result 1418 states and 2237 transitions. [2019-11-07 00:41:49,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:49,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-11-07 00:41:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:49,034 INFO L225 Difference]: With dead ends: 1418 [2019-11-07 00:41:49,034 INFO L226 Difference]: Without dead ends: 755 [2019-11-07 00:41:49,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2019-11-07 00:41:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 753. [2019-11-07 00:41:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2019-11-07 00:41:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1162 transitions. [2019-11-07 00:41:49,063 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1162 transitions. Word has length 133 [2019-11-07 00:41:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:49,064 INFO L462 AbstractCegarLoop]: Abstraction has 753 states and 1162 transitions. [2019-11-07 00:41:49,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:41:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1162 transitions. [2019-11-07 00:41:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:41:49,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:49,066 INFO L410 BasicCegarLoop]: trace histogram [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 00:41:49,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:49,274 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:49,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1683046364, now seen corresponding path program 1 times [2019-11-07 00:41:49,276 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:49,276 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104809846] [2019-11-07 00:41:49,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:49,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104809846] [2019-11-07 00:41:49,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55121475] [2019-11-07 00:41:49,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:50,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:41:50,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:41:50,178 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:50,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:41:50,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:50,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-11-07 00:41:50,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065520164] [2019-11-07 00:41:50,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:41:50,467 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:41:50,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:41:50,467 INFO L87 Difference]: Start difference. First operand 753 states and 1162 transitions. Second operand 8 states. [2019-11-07 00:41:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:50,590 INFO L93 Difference]: Finished difference Result 1432 states and 2248 transitions. [2019-11-07 00:41:50,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:41:50,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-11-07 00:41:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:50,595 INFO L225 Difference]: With dead ends: 1432 [2019-11-07 00:41:50,595 INFO L226 Difference]: Without dead ends: 762 [2019-11-07 00:41:50,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:41:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states.