./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3fd4ba6d5d6f8656cafcc266639497265ce714ee15e353bdb887d26cd828a30 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:57:25,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:57:25,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:57:25,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:57:25,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:57:25,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:57:25,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:57:25,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:57:25,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:57:25,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:57:25,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:57:25,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:57:25,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:57:25,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:57:25,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:57:25,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:57:25,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:57:25,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:57:25,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:57:25,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:57:25,355 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:57:25,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:57:25,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:57:25,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:57:25,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:57:25,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:57:25,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:57:25,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:57:25,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:57:25,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:57:25,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:57:25,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:57:25,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:57:25,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:57:25,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:57:25,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:57:25,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:57:25,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:57:25,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:57:25,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:57:25,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:57:25,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:57:25,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:57:25,413 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:57:25,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:57:25,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:57:25,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:57:25,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:57:25,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:57:25,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:57:25,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:57:25,418 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:57:25,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:57:25,419 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:57:25,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:57:25,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:57:25,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:57:25,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:57:25,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:57:25,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:57:25,421 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:57:25,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:57:25,422 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:57:25,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:57:25,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:57:25,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:57:25,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:57:25,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:57:25,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:57:25,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:57:25,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:57:25,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:57:25,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:57:25,425 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:57:25,425 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:57:25,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:57:25,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3fd4ba6d5d6f8656cafcc266639497265ce714ee15e353bdb887d26cd828a30 [2022-07-22 16:57:25,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:57:25,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:57:25,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:57:25,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:57:25,652 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:57:25,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c [2022-07-22 16:57:25,707 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2315e4c8b/a245618ab70f41e9ac85020a3ec01a37/FLAGf3736f921 [2022-07-22 16:57:26,180 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:57:26,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c [2022-07-22 16:57:26,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2315e4c8b/a245618ab70f41e9ac85020a3ec01a37/FLAGf3736f921 [2022-07-22 16:57:26,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2315e4c8b/a245618ab70f41e9ac85020a3ec01a37 [2022-07-22 16:57:26,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:57:26,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:57:26,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:57:26,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:57:26,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:57:26,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@392d6310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26, skipping insertion in model container [2022-07-22 16:57:26,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:57:26,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:57:26,723 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c[77005,77018] [2022-07-22 16:57:26,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:57:26,732 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:57:26,825 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_productSimulator.cil.c[77005,77018] [2022-07-22 16:57:26,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:57:26,850 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:57:26,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26 WrapperNode [2022-07-22 16:57:26,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:57:26,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:57:26,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:57:26,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:57:26,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,925 INFO L137 Inliner]: procedures = 107, calls = 375, calls flagged for inlining = 33, calls inlined = 29, statements flattened = 1021 [2022-07-22 16:57:26,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:57:26,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:57:26,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:57:26,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:57:26,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:26,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:57:26,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:57:26,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:57:26,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:57:26,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (1/1) ... [2022-07-22 16:57:27,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:57:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:57:27,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 16:57:27,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 16:57:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-07-22 16:57:27,097 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-07-22 16:57:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-07-22 16:57:27,097 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-07-22 16:57:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-07-22 16:57:27,097 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-07-22 16:57:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__twothirdsfull [2022-07-22 16:57:27,099 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__twothirdsfull [2022-07-22 16:57:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-07-22 16:57:27,099 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-07-22 16:57:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__empty [2022-07-22 16:57:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__empty [2022-07-22 16:57:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-07-22 16:57:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-07-22 16:57:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-07-22 16:57:27,100 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-07-22 16:57:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-07-22 16:57:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-07-22 16:57:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2022-07-22 16:57:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2022-07-22 16:57:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__before__weight [2022-07-22 16:57:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__before__weight [2022-07-22 16:57:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-07-22 16:57:27,102 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-07-22 16:57:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-07-22 16:57:27,102 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-07-22 16:57:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-07-22 16:57:27,102 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-07-22 16:57:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:57:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-07-22 16:57:27,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-07-22 16:57:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-07-22 16:57:27,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-07-22 16:57:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-07-22 16:57:27,103 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-07-22 16:57:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-07-22 16:57:27,104 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-07-22 16:57:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__before__overloaded [2022-07-22 16:57:27,104 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__before__overloaded [2022-07-22 16:57:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-07-22 16:57:27,104 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-07-22 16:57:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-07-22 16:57:27,105 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-07-22 16:57:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-07-22 16:57:27,105 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-07-22 16:57:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__weight [2022-07-22 16:57:27,106 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__weight [2022-07-22 16:57:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__executivefloor [2022-07-22 16:57:27,106 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__executivefloor [2022-07-22 16:57:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-07-22 16:57:27,107 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-07-22 16:57:27,107 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__executivefloor [2022-07-22 16:57:27,107 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__executivefloor [2022-07-22 16:57:27,108 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-07-22 16:57:27,108 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-07-22 16:57:27,108 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-07-22 16:57:27,109 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-07-22 16:57:27,109 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-07-22 16:57:27,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-07-22 16:57:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-07-22 16:57:27,110 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-07-22 16:57:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:57:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2022-07-22 16:57:27,111 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2022-07-22 16:57:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-07-22 16:57:27,111 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-07-22 16:57:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2022-07-22 16:57:27,111 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2022-07-22 16:57:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:57:27,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:57:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-07-22 16:57:27,112 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-07-22 16:57:27,319 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:57:27,321 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:57:28,270 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:57:28,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:57:28,286 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 16:57:28,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:57:28 BoogieIcfgContainer [2022-07-22 16:57:28,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:57:28,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:57:28,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:57:28,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:57:28,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:57:26" (1/3) ... [2022-07-22 16:57:28,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd69bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:57:28, skipping insertion in model container [2022-07-22 16:57:28,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:57:26" (2/3) ... [2022-07-22 16:57:28,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd69bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:57:28, skipping insertion in model container [2022-07-22 16:57:28,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:57:28" (3/3) ... [2022-07-22 16:57:28,297 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_productSimulator.cil.c [2022-07-22 16:57:28,309 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:57:28,309 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:57:28,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:57:28,367 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d4a0e6e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@17b6038c [2022-07-22 16:57:28,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:57:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 651 states, 492 states have (on average 1.6321138211382114) internal successors, (803), 514 states have internal predecessors, (803), 123 states have call successors, (123), 34 states have call predecessors, (123), 34 states have return successors, (123), 119 states have call predecessors, (123), 123 states have call successors, (123) [2022-07-22 16:57:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 16:57:28,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:28,389 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:28,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash 490189906, now seen corresponding path program 1 times [2022-07-22 16:57:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:28,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142490124] [2022-07-22 16:57:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:28,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 16:57:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 16:57:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 16:57:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 16:57:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 16:57:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 16:57:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:28,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:28,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142490124] [2022-07-22 16:57:28,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142490124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:28,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:28,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 16:57:28,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063955348] [2022-07-22 16:57:28,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:28,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 16:57:28,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:28,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 16:57:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:57:28,999 INFO L87 Difference]: Start difference. First operand has 651 states, 492 states have (on average 1.6321138211382114) internal successors, (803), 514 states have internal predecessors, (803), 123 states have call successors, (123), 34 states have call predecessors, (123), 34 states have return successors, (123), 119 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:32,169 INFO L93 Difference]: Finished difference Result 1399 states and 2285 transitions. [2022-07-22 16:57:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 16:57:32,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2022-07-22 16:57:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:32,191 INFO L225 Difference]: With dead ends: 1399 [2022-07-22 16:57:32,191 INFO L226 Difference]: Without dead ends: 752 [2022-07-22 16:57:32,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:57:32,203 INFO L413 NwaCegarLoop]: 1009 mSDtfsCounter, 716 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:32,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 2645 Invalid, 2415 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [160 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 16:57:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-22 16:57:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 642. [2022-07-22 16:57:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 485 states have (on average 1.620618556701031) internal successors, (786), 506 states have internal predecessors, (786), 123 states have call successors, (123), 34 states have call predecessors, (123), 33 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1031 transitions. [2022-07-22 16:57:32,319 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1031 transitions. Word has length 93 [2022-07-22 16:57:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:32,319 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 1031 transitions. [2022-07-22 16:57:32,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1031 transitions. [2022-07-22 16:57:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 16:57:32,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:32,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:32,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:57:32,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2135051856, now seen corresponding path program 1 times [2022-07-22 16:57:32,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:32,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981545639] [2022-07-22 16:57:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:32,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 16:57:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 16:57:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 16:57:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-22 16:57:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 16:57:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:32,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:32,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981545639] [2022-07-22 16:57:32,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981545639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:32,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:32,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:32,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706056078] [2022-07-22 16:57:32,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:32,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:32,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:32,569 INFO L87 Difference]: Start difference. First operand 642 states and 1031 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:35,384 INFO L93 Difference]: Finished difference Result 1369 states and 2228 transitions. [2022-07-22 16:57:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:57:35,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 94 [2022-07-22 16:57:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:35,395 INFO L225 Difference]: With dead ends: 1369 [2022-07-22 16:57:35,395 INFO L226 Difference]: Without dead ends: 756 [2022-07-22 16:57:35,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:57:35,404 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 710 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:35,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 2079 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 16:57:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-22 16:57:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-22 16:57:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6168032786885247) internal successors, (789), 509 states have internal predecessors, (789), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1034 transitions. [2022-07-22 16:57:35,457 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1034 transitions. Word has length 94 [2022-07-22 16:57:35,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:35,458 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1034 transitions. [2022-07-22 16:57:35,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1034 transitions. [2022-07-22 16:57:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 16:57:35,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:35,461 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:35,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 16:57:35,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1741664601, now seen corresponding path program 1 times [2022-07-22 16:57:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:35,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17940132] [2022-07-22 16:57:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:35,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 16:57:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 16:57:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 16:57:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 16:57:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:35,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17940132] [2022-07-22 16:57:35,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17940132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:35,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:35,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:35,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426706812] [2022-07-22 16:57:35,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:35,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:35,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:35,697 INFO L87 Difference]: Start difference. First operand 646 states and 1034 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:38,097 INFO L93 Difference]: Finished difference Result 1366 states and 2215 transitions. [2022-07-22 16:57:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:57:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 95 [2022-07-22 16:57:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:38,103 INFO L225 Difference]: With dead ends: 1366 [2022-07-22 16:57:38,103 INFO L226 Difference]: Without dead ends: 756 [2022-07-22 16:57:38,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:57:38,108 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 706 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:38,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 2090 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 16:57:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-22 16:57:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-22 16:57:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6147540983606556) internal successors, (788), 509 states have internal predecessors, (788), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1033 transitions. [2022-07-22 16:57:38,155 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1033 transitions. Word has length 95 [2022-07-22 16:57:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:38,155 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1033 transitions. [2022-07-22 16:57:38,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1033 transitions. [2022-07-22 16:57:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 16:57:38,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:38,158 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:38,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 16:57:38,158 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash 91247532, now seen corresponding path program 1 times [2022-07-22 16:57:38,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:38,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759994046] [2022-07-22 16:57:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:38,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 16:57:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 16:57:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:57:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-22 16:57:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-22 16:57:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:38,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:38,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759994046] [2022-07-22 16:57:38,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759994046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:38,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:38,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953525749] [2022-07-22 16:57:38,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:38,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:38,345 INFO L87 Difference]: Start difference. First operand 646 states and 1033 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:40,755 INFO L93 Difference]: Finished difference Result 1366 states and 2214 transitions. [2022-07-22 16:57:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:57:40,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 96 [2022-07-22 16:57:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:40,761 INFO L225 Difference]: With dead ends: 1366 [2022-07-22 16:57:40,761 INFO L226 Difference]: Without dead ends: 756 [2022-07-22 16:57:40,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:57:40,765 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 703 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:40,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 2090 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 16:57:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-22 16:57:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-22 16:57:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6127049180327868) internal successors, (787), 509 states have internal predecessors, (787), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1032 transitions. [2022-07-22 16:57:40,806 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1032 transitions. Word has length 96 [2022-07-22 16:57:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:40,807 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1032 transitions. [2022-07-22 16:57:40,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1032 transitions. [2022-07-22 16:57:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 16:57:40,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:40,809 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:40,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 16:57:40,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:40,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:40,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1465980477, now seen corresponding path program 1 times [2022-07-22 16:57:40,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:40,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466715046] [2022-07-22 16:57:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:40,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 16:57:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 16:57:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 16:57:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-22 16:57:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-22 16:57:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:40,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:40,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466715046] [2022-07-22 16:57:40,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466715046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:40,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:40,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:40,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930498855] [2022-07-22 16:57:40,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:40,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:40,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:40,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:40,976 INFO L87 Difference]: Start difference. First operand 646 states and 1032 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:43,356 INFO L93 Difference]: Finished difference Result 1366 states and 2213 transitions. [2022-07-22 16:57:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:57:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 97 [2022-07-22 16:57:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:43,367 INFO L225 Difference]: With dead ends: 1366 [2022-07-22 16:57:43,367 INFO L226 Difference]: Without dead ends: 756 [2022-07-22 16:57:43,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:57:43,374 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 700 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:43,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 2090 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 16:57:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-22 16:57:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-22 16:57:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.610655737704918) internal successors, (786), 509 states have internal predecessors, (786), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1031 transitions. [2022-07-22 16:57:43,421 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1031 transitions. Word has length 97 [2022-07-22 16:57:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:43,422 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1031 transitions. [2022-07-22 16:57:43,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1031 transitions. [2022-07-22 16:57:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-22 16:57:43,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:43,424 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:43,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 16:57:43,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -743370488, now seen corresponding path program 1 times [2022-07-22 16:57:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:43,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179232327] [2022-07-22 16:57:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 16:57:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 16:57:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 16:57:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-22 16:57:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-22 16:57:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:43,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:43,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179232327] [2022-07-22 16:57:43,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179232327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:43,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:43,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:43,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644136294] [2022-07-22 16:57:43,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:43,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:43,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:43,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:43,609 INFO L87 Difference]: Start difference. First operand 646 states and 1031 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:45,854 INFO L93 Difference]: Finished difference Result 1366 states and 2212 transitions. [2022-07-22 16:57:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:57:45,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 98 [2022-07-22 16:57:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:45,860 INFO L225 Difference]: With dead ends: 1366 [2022-07-22 16:57:45,860 INFO L226 Difference]: Without dead ends: 756 [2022-07-22 16:57:45,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:57:45,864 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 697 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:45,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2090 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 16:57:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-07-22 16:57:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 646. [2022-07-22 16:57:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6086065573770492) internal successors, (785), 509 states have internal predecessors, (785), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1030 transitions. [2022-07-22 16:57:45,917 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1030 transitions. Word has length 98 [2022-07-22 16:57:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:45,917 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1030 transitions. [2022-07-22 16:57:45,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1030 transitions. [2022-07-22 16:57:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 16:57:45,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:45,919 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:45,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 16:57:45,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1934740703, now seen corresponding path program 1 times [2022-07-22 16:57:45,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:45,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870643228] [2022-07-22 16:57:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:45,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:45,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:45,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:45,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:45,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:45,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:57:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 16:57:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-22 16:57:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-22 16:57:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 16:57:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:46,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:46,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870643228] [2022-07-22 16:57:46,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870643228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:46,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:46,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:46,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685011982] [2022-07-22 16:57:46,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:46,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:46,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:46,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:46,100 INFO L87 Difference]: Start difference. First operand 646 states and 1030 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:48,534 INFO L93 Difference]: Finished difference Result 1391 states and 2256 transitions. [2022-07-22 16:57:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 16:57:48,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 99 [2022-07-22 16:57:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:48,539 INFO L225 Difference]: With dead ends: 1391 [2022-07-22 16:57:48,540 INFO L226 Difference]: Without dead ends: 785 [2022-07-22 16:57:48,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 16:57:48,543 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 775 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:48,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1883 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 16:57:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-22 16:57:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 666. [2022-07-22 16:57:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 507 states have (on average 1.6055226824457594) internal successors, (814), 528 states have internal predecessors, (814), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1059 transitions. [2022-07-22 16:57:48,585 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1059 transitions. Word has length 99 [2022-07-22 16:57:48,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:48,585 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1059 transitions. [2022-07-22 16:57:48,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1059 transitions. [2022-07-22 16:57:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 16:57:48,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:48,587 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:48,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 16:57:48,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1564590535, now seen corresponding path program 1 times [2022-07-22 16:57:48,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:48,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043871555] [2022-07-22 16:57:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:57:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-22 16:57:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-22 16:57:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 16:57:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 16:57:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:48,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:48,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043871555] [2022-07-22 16:57:48,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043871555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:48,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:48,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:48,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261031141] [2022-07-22 16:57:48,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:48,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:48,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:48,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:48,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:48,751 INFO L87 Difference]: Start difference. First operand 666 states and 1059 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:51,148 INFO L93 Difference]: Finished difference Result 1375 states and 2207 transitions. [2022-07-22 16:57:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:57:51,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 100 [2022-07-22 16:57:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:51,153 INFO L225 Difference]: With dead ends: 1375 [2022-07-22 16:57:51,153 INFO L226 Difference]: Without dead ends: 785 [2022-07-22 16:57:51,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:57:51,156 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 750 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:51,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1877 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 16:57:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-22 16:57:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 666. [2022-07-22 16:57:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 507 states have (on average 1.5956607495069033) internal successors, (809), 528 states have internal predecessors, (809), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1054 transitions. [2022-07-22 16:57:51,197 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1054 transitions. Word has length 100 [2022-07-22 16:57:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:51,198 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1054 transitions. [2022-07-22 16:57:51,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1054 transitions. [2022-07-22 16:57:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 16:57:51,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:51,200 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:51,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 16:57:51,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:51,201 INFO L85 PathProgramCache]: Analyzing trace with hash -55367388, now seen corresponding path program 1 times [2022-07-22 16:57:51,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:51,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320077857] [2022-07-22 16:57:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:51,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:57:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 16:57:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 16:57:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 16:57:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-22 16:57:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320077857] [2022-07-22 16:57:51,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320077857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:51,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:51,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847880076] [2022-07-22 16:57:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:51,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:51,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:51,364 INFO L87 Difference]: Start difference. First operand 666 states and 1054 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:53,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:53,901 INFO L93 Difference]: Finished difference Result 1375 states and 2202 transitions. [2022-07-22 16:57:53,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:57:53,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 101 [2022-07-22 16:57:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:53,906 INFO L225 Difference]: With dead ends: 1375 [2022-07-22 16:57:53,906 INFO L226 Difference]: Without dead ends: 785 [2022-07-22 16:57:53,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:57:53,909 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 749 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:53,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1881 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 16:57:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-22 16:57:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 666. [2022-07-22 16:57:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 507 states have (on average 1.5857988165680474) internal successors, (804), 528 states have internal predecessors, (804), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1049 transitions. [2022-07-22 16:57:53,949 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1049 transitions. Word has length 101 [2022-07-22 16:57:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:53,949 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1049 transitions. [2022-07-22 16:57:53,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1049 transitions. [2022-07-22 16:57:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 16:57:53,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:53,951 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:53,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 16:57:53,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1764660052, now seen corresponding path program 1 times [2022-07-22 16:57:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:53,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817065278] [2022-07-22 16:57:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:53,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:53,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:53,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:53,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:57:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 16:57:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 16:57:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 16:57:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 16:57:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:54,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817065278] [2022-07-22 16:57:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817065278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:54,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:54,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:57:54,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863591799] [2022-07-22 16:57:54,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:54,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:57:54,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:54,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:57:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:57:54,107 INFO L87 Difference]: Start difference. First operand 666 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:56,318 INFO L93 Difference]: Finished difference Result 1375 states and 2197 transitions. [2022-07-22 16:57:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:57:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 102 [2022-07-22 16:57:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:56,322 INFO L225 Difference]: With dead ends: 1375 [2022-07-22 16:57:56,322 INFO L226 Difference]: Without dead ends: 785 [2022-07-22 16:57:56,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:57:56,324 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 748 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:56,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 1877 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 16:57:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-22 16:57:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 666. [2022-07-22 16:57:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 528 states have internal predecessors, (799), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1044 transitions. [2022-07-22 16:57:56,364 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1044 transitions. Word has length 102 [2022-07-22 16:57:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:56,364 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1044 transitions. [2022-07-22 16:57:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:57:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1044 transitions. [2022-07-22 16:57:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-22 16:57:56,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:56,366 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:56,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 16:57:56,367 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:56,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -221028659, now seen corresponding path program 1 times [2022-07-22 16:57:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:56,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157363963] [2022-07-22 16:57:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:57:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:57:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 16:57:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 16:57:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:57:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-22 16:57:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 16:57:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:57:56,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:57:56,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157363963] [2022-07-22 16:57:56,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157363963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:57:56,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:57:56,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 16:57:56,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193026187] [2022-07-22 16:57:56,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:57:56,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:57:56,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:57:56,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:57:56,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:57:56,578 INFO L87 Difference]: Start difference. First operand 666 states and 1044 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:57:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:57:59,864 INFO L93 Difference]: Finished difference Result 1410 states and 2245 transitions. [2022-07-22 16:57:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:57:59,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 102 [2022-07-22 16:57:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:57:59,869 INFO L225 Difference]: With dead ends: 1410 [2022-07-22 16:57:59,869 INFO L226 Difference]: Without dead ends: 826 [2022-07-22 16:57:59,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:57:59,872 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 762 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 3716 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 3879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:57:59,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 3283 Invalid, 3879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3716 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 16:57:59,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-07-22 16:57:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 670. [2022-07-22 16:57:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 511 states have (on average 1.5714285714285714) internal successors, (803), 532 states have internal predecessors, (803), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:57:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1048 transitions. [2022-07-22 16:57:59,912 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1048 transitions. Word has length 102 [2022-07-22 16:57:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:57:59,912 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1048 transitions. [2022-07-22 16:57:59,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:57:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1048 transitions. [2022-07-22 16:57:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 16:57:59,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:57:59,914 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:57:59,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 16:57:59,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:57:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:57:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1948362391, now seen corresponding path program 1 times [2022-07-22 16:57:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:57:59,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911865917] [2022-07-22 16:57:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:57:59,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:57:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:59,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:57:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:59,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:57:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:59,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:57:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:59,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:57:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:57:59,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:57:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 16:58:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-22 16:58:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-22 16:58:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 16:58:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:00,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:00,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911865917] [2022-07-22 16:58:00,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911865917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:00,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:00,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:58:00,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130442399] [2022-07-22 16:58:00,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:00,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:58:00,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:58:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:58:00,057 INFO L87 Difference]: Start difference. First operand 670 states and 1048 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:58:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:02,254 INFO L93 Difference]: Finished difference Result 1385 states and 2201 transitions. [2022-07-22 16:58:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:58:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 103 [2022-07-22 16:58:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:02,258 INFO L225 Difference]: With dead ends: 1385 [2022-07-22 16:58:02,259 INFO L226 Difference]: Without dead ends: 791 [2022-07-22 16:58:02,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:58:02,261 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 747 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:02,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1881 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 16:58:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-07-22 16:58:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 670. [2022-07-22 16:58:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 511 states have (on average 1.5616438356164384) internal successors, (798), 532 states have internal predecessors, (798), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:58:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1043 transitions. [2022-07-22 16:58:02,301 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1043 transitions. Word has length 103 [2022-07-22 16:58:02,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:02,301 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1043 transitions. [2022-07-22 16:58:02,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:58:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1043 transitions. [2022-07-22 16:58:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 16:58:02,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:02,303 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:58:02,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 16:58:02,304 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:02,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2003716070, now seen corresponding path program 1 times [2022-07-22 16:58:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:02,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190342510] [2022-07-22 16:58:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:02,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 16:58:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-22 16:58:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-22 16:58:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 16:58:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:02,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:02,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190342510] [2022-07-22 16:58:02,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190342510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:02,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:02,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 16:58:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226845564] [2022-07-22 16:58:02,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:58:02,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:58:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:58:02,503 INFO L87 Difference]: Start difference. First operand 670 states and 1043 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:05,608 INFO L93 Difference]: Finished difference Result 1418 states and 2244 transitions. [2022-07-22 16:58:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:58:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 103 [2022-07-22 16:58:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:05,613 INFO L225 Difference]: With dead ends: 1418 [2022-07-22 16:58:05,613 INFO L226 Difference]: Without dead ends: 832 [2022-07-22 16:58:05,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:58:05,616 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 764 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 3659 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 3252 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:05,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 3252 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3659 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 16:58:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-07-22 16:58:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 676. [2022-07-22 16:58:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 517 states have (on average 1.5551257253384914) internal successors, (804), 538 states have internal predecessors, (804), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:58:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1049 transitions. [2022-07-22 16:58:05,656 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1049 transitions. Word has length 103 [2022-07-22 16:58:05,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:05,656 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 1049 transitions. [2022-07-22 16:58:05,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1049 transitions. [2022-07-22 16:58:05,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 16:58:05,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:05,658 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:58:05,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 16:58:05,658 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2083404911, now seen corresponding path program 1 times [2022-07-22 16:58:05,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:05,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249998800] [2022-07-22 16:58:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:05,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 16:58:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 16:58:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-22 16:58:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-22 16:58:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:05,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:05,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249998800] [2022-07-22 16:58:05,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249998800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:05,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:05,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 16:58:05,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612996243] [2022-07-22 16:58:05,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:05,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:58:05,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:58:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:58:05,819 INFO L87 Difference]: Start difference. First operand 676 states and 1049 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:08,731 INFO L93 Difference]: Finished difference Result 1415 states and 2233 transitions. [2022-07-22 16:58:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 16:58:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 104 [2022-07-22 16:58:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:08,735 INFO L225 Difference]: With dead ends: 1415 [2022-07-22 16:58:08,735 INFO L226 Difference]: Without dead ends: 829 [2022-07-22 16:58:08,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:58:08,737 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 775 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 3614 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 3774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 3614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:08,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 3334 Invalid, 3774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 3614 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 16:58:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-22 16:58:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 687. [2022-07-22 16:58:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 525 states have (on average 1.5523809523809524) internal successors, (815), 548 states have internal predecessors, (815), 124 states have call successors, (124), 36 states have call predecessors, (124), 37 states have return successors, (125), 119 states have call predecessors, (125), 123 states have call successors, (125) [2022-07-22 16:58:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1064 transitions. [2022-07-22 16:58:08,793 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1064 transitions. Word has length 104 [2022-07-22 16:58:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:08,793 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 1064 transitions. [2022-07-22 16:58:08,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1064 transitions. [2022-07-22 16:58:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 16:58:08,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:08,795 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:58:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 16:58:08,796 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1957409166, now seen corresponding path program 1 times [2022-07-22 16:58:08,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:08,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953352140] [2022-07-22 16:58:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 16:58:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 16:58:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-22 16:58:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-22 16:58:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:08,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:08,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953352140] [2022-07-22 16:58:08,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953352140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:08,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:08,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 16:58:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875030739] [2022-07-22 16:58:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:08,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:58:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:58:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:58:08,977 INFO L87 Difference]: Start difference. First operand 687 states and 1064 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:12,062 INFO L93 Difference]: Finished difference Result 1447 states and 2275 transitions. [2022-07-22 16:58:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:58:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 104 [2022-07-22 16:58:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:12,067 INFO L225 Difference]: With dead ends: 1447 [2022-07-22 16:58:12,067 INFO L226 Difference]: Without dead ends: 855 [2022-07-22 16:58:12,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:58:12,070 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 760 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 3648 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 3814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:12,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 3271 Invalid, 3814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3648 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 16:58:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-07-22 16:58:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 695. [2022-07-22 16:58:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 533 states have (on average 1.5422138836772983) internal successors, (822), 556 states have internal predecessors, (822), 124 states have call successors, (124), 36 states have call predecessors, (124), 37 states have return successors, (125), 119 states have call predecessors, (125), 123 states have call successors, (125) [2022-07-22 16:58:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1071 transitions. [2022-07-22 16:58:12,114 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1071 transitions. Word has length 104 [2022-07-22 16:58:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:12,114 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1071 transitions. [2022-07-22 16:58:12,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1071 transitions. [2022-07-22 16:58:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 16:58:12,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:12,116 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:58:12,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 16:58:12,116 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1803055022, now seen corresponding path program 1 times [2022-07-22 16:58:12,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:12,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075903589] [2022-07-22 16:58:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 16:58:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 16:58:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-22 16:58:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-22 16:58:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:12,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075903589] [2022-07-22 16:58:12,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075903589] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:12,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:12,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:58:12,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614778639] [2022-07-22 16:58:12,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:12,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:58:12,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:58:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:58:12,249 INFO L87 Difference]: Start difference. First operand 695 states and 1071 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:58:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:14,476 INFO L93 Difference]: Finished difference Result 1481 states and 2309 transitions. [2022-07-22 16:58:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:58:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 104 [2022-07-22 16:58:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:14,481 INFO L225 Difference]: With dead ends: 1481 [2022-07-22 16:58:14,481 INFO L226 Difference]: Without dead ends: 802 [2022-07-22 16:58:14,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:58:14,484 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 697 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:14,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2009 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 16:58:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-07-22 16:58:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 676. [2022-07-22 16:58:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 517 states have (on average 1.5454545454545454) internal successors, (799), 538 states have internal predecessors, (799), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:58:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1044 transitions. [2022-07-22 16:58:14,524 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1044 transitions. Word has length 104 [2022-07-22 16:58:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:14,524 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 1044 transitions. [2022-07-22 16:58:14,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:58:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1044 transitions. [2022-07-22 16:58:14,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-22 16:58:14,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:14,526 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:58:14,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 16:58:14,526 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash -112007701, now seen corresponding path program 1 times [2022-07-22 16:58:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:14,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468412755] [2022-07-22 16:58:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:14,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 16:58:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 16:58:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-22 16:58:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-22 16:58:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:14,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:14,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468412755] [2022-07-22 16:58:14,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468412755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:14,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:14,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 16:58:14,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339903313] [2022-07-22 16:58:14,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:14,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:58:14,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:58:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:58:14,695 INFO L87 Difference]: Start difference. First operand 676 states and 1044 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:17,775 INFO L93 Difference]: Finished difference Result 1428 states and 2234 transitions. [2022-07-22 16:58:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:58:17,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 105 [2022-07-22 16:58:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:17,779 INFO L225 Difference]: With dead ends: 1428 [2022-07-22 16:58:17,779 INFO L226 Difference]: Without dead ends: 835 [2022-07-22 16:58:17,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:58:17,781 INFO L413 NwaCegarLoop]: 939 mSDtfsCounter, 741 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 3616 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 3208 SdHoareTripleChecker+Invalid, 3780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 3616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:17,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 3208 Invalid, 3780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 3616 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 16:58:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-07-22 16:58:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 686. [2022-07-22 16:58:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 527 states have (on average 1.5351043643263758) internal successors, (809), 548 states have internal predecessors, (809), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:58:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1054 transitions. [2022-07-22 16:58:17,822 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1054 transitions. Word has length 105 [2022-07-22 16:58:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:17,822 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1054 transitions. [2022-07-22 16:58:17,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1054 transitions. [2022-07-22 16:58:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 16:58:17,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:17,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:58:17,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 16:58:17,824 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash -358030363, now seen corresponding path program 1 times [2022-07-22 16:58:17,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:17,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787515338] [2022-07-22 16:58:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:17,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-22 16:58:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 16:58:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-22 16:58:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:17,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:17,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787515338] [2022-07-22 16:58:17,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787515338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:17,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:17,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:58:17,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17582227] [2022-07-22 16:58:17,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:17,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:58:17,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:58:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:58:17,973 INFO L87 Difference]: Start difference. First operand 686 states and 1054 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:58:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:20,272 INFO L93 Difference]: Finished difference Result 1424 states and 2222 transitions. [2022-07-22 16:58:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 16:58:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 106 [2022-07-22 16:58:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:20,277 INFO L225 Difference]: With dead ends: 1424 [2022-07-22 16:58:20,277 INFO L226 Difference]: Without dead ends: 805 [2022-07-22 16:58:20,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 16:58:20,280 INFO L413 NwaCegarLoop]: 944 mSDtfsCounter, 761 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:20,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 1859 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 16:58:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-07-22 16:58:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 686. [2022-07-22 16:58:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 527 states have (on average 1.5275142314990513) internal successors, (805), 548 states have internal predecessors, (805), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 16:58:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1050 transitions. [2022-07-22 16:58:20,318 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1050 transitions. Word has length 106 [2022-07-22 16:58:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:20,319 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1050 transitions. [2022-07-22 16:58:20,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 16:58:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1050 transitions. [2022-07-22 16:58:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 16:58:20,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:20,321 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:58:20,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 16:58:20,321 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1997774887, now seen corresponding path program 1 times [2022-07-22 16:58:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:20,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393088261] [2022-07-22 16:58:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:20,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-22 16:58:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 16:58:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-22 16:58:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:20,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:20,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393088261] [2022-07-22 16:58:20,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393088261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:20,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:20,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 16:58:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652607131] [2022-07-22 16:58:20,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:20,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 16:58:20,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 16:58:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 16:58:20,462 INFO L87 Difference]: Start difference. First operand 686 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:23,542 INFO L93 Difference]: Finished difference Result 2167 states and 3405 transitions. [2022-07-22 16:58:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:58:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 106 [2022-07-22 16:58:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:23,550 INFO L225 Difference]: With dead ends: 2167 [2022-07-22 16:58:23,550 INFO L226 Difference]: Without dead ends: 1576 [2022-07-22 16:58:23,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:58:23,552 INFO L413 NwaCegarLoop]: 1027 mSDtfsCounter, 2189 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:23,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 1585 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 16:58:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-07-22 16:58:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1339. [2022-07-22 16:58:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1034 states have (on average 1.5328820116054158) internal successors, (1585), 1072 states have internal predecessors, (1585), 235 states have call successors, (235), 71 states have call predecessors, (235), 69 states have return successors, (239), 228 states have call predecessors, (239), 233 states have call successors, (239) [2022-07-22 16:58:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2059 transitions. [2022-07-22 16:58:23,659 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2059 transitions. Word has length 106 [2022-07-22 16:58:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:23,661 INFO L495 AbstractCegarLoop]: Abstraction has 1339 states and 2059 transitions. [2022-07-22 16:58:23,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2059 transitions. [2022-07-22 16:58:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-22 16:58:23,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:23,664 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2022-07-22 16:58:23,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 16:58:23,665 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash 502711325, now seen corresponding path program 1 times [2022-07-22 16:58:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:23,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346345828] [2022-07-22 16:58:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:23,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-22 16:58:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 16:58:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 16:58:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 16:58:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-22 16:58:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 16:58:23,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:23,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346345828] [2022-07-22 16:58:23,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346345828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:23,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:23,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 16:58:23,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743495576] [2022-07-22 16:58:23,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:23,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 16:58:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 16:58:23,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 16:58:23,817 INFO L87 Difference]: Start difference. First operand 1339 states and 2059 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:27,399 INFO L93 Difference]: Finished difference Result 4118 states and 6618 transitions. [2022-07-22 16:58:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:58:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 107 [2022-07-22 16:58:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:27,413 INFO L225 Difference]: With dead ends: 4118 [2022-07-22 16:58:27,414 INFO L226 Difference]: Without dead ends: 2951 [2022-07-22 16:58:27,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:58:27,419 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 2169 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:27,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2291 Valid, 1611 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-22 16:58:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2022-07-22 16:58:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2475. [2022-07-22 16:58:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 1892 states have (on average 1.5602536997885834) internal successors, (2952), 1965 states have internal predecessors, (2952), 453 states have call successors, (453), 133 states have call predecessors, (453), 129 states have return successors, (506), 437 states have call predecessors, (506), 449 states have call successors, (506) [2022-07-22 16:58:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 3911 transitions. [2022-07-22 16:58:27,672 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 3911 transitions. Word has length 107 [2022-07-22 16:58:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:27,673 INFO L495 AbstractCegarLoop]: Abstraction has 2475 states and 3911 transitions. [2022-07-22 16:58:27,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 16:58:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 3911 transitions. [2022-07-22 16:58:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-22 16:58:27,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:27,683 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:58:27,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 16:58:27,684 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1312417806, now seen corresponding path program 1 times [2022-07-22 16:58:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:27,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416997612] [2022-07-22 16:58:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:27,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:27,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 16:58:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-22 16:58:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-22 16:58:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-22 16:58:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 16:58:28,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:28,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416997612] [2022-07-22 16:58:28,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416997612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:28,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:28,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 16:58:28,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748223378] [2022-07-22 16:58:28,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:28,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 16:58:28,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 16:58:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:58:28,037 INFO L87 Difference]: Start difference. First operand 2475 states and 3911 transitions. Second operand has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 8 states have internal predecessors, (98), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 16:58:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:34,087 INFO L93 Difference]: Finished difference Result 5728 states and 9470 transitions. [2022-07-22 16:58:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 16:58:34,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 8 states have internal predecessors, (98), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 151 [2022-07-22 16:58:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:34,106 INFO L225 Difference]: With dead ends: 5728 [2022-07-22 16:58:34,106 INFO L226 Difference]: Without dead ends: 3424 [2022-07-22 16:58:34,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-07-22 16:58:34,116 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 3667 mSDsluCounter, 2366 mSDsCounter, 0 mSdLazyCounter, 6496 mSolverCounterSat, 1551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3684 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 8047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1551 IncrementalHoareTripleChecker+Valid, 6496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:34,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3684 Valid, 3273 Invalid, 8047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1551 Valid, 6496 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-22 16:58:34,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2022-07-22 16:58:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 2513. [2022-07-22 16:58:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 1921 states have (on average 1.5549193128578864) internal successors, (2987), 1998 states have internal predecessors, (2987), 447 states have call successors, (447), 134 states have call predecessors, (447), 144 states have return successors, (551), 441 states have call predecessors, (551), 443 states have call successors, (551) [2022-07-22 16:58:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3985 transitions. [2022-07-22 16:58:34,399 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3985 transitions. Word has length 151 [2022-07-22 16:58:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:34,399 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3985 transitions. [2022-07-22 16:58:34,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 8 states have internal predecessors, (98), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 16:58:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3985 transitions. [2022-07-22 16:58:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-22 16:58:34,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:34,408 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:58:34,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 16:58:34,409 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1111638433, now seen corresponding path program 1 times [2022-07-22 16:58:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606466761] [2022-07-22 16:58:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:34,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-22 16:58:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 16:58:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 16:58:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 16:58:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 16:58:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 16:58:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-22 16:58:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-22 16:58:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-22 16:58:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-22 16:58:34,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:34,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606466761] [2022-07-22 16:58:34,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606466761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:58:34,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392302925] [2022-07-22 16:58:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:34,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:58:34,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:58:34,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:58:34,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:58:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:35,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 16:58:35,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:58:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 16:58:35,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:58:35,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392302925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:35,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:58:35,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 15 [2022-07-22 16:58:35,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282054318] [2022-07-22 16:58:35,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:35,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 16:58:35,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 16:58:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:58:35,201 INFO L87 Difference]: Start difference. First operand 2513 states and 3985 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-22 16:58:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:35,504 INFO L93 Difference]: Finished difference Result 3679 states and 5851 transitions. [2022-07-22 16:58:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 16:58:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 158 [2022-07-22 16:58:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:35,515 INFO L225 Difference]: With dead ends: 3679 [2022-07-22 16:58:35,515 INFO L226 Difference]: Without dead ends: 2515 [2022-07-22 16:58:35,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:58:35,521 INFO L413 NwaCegarLoop]: 1918 mSDtfsCounter, 917 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 2881 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:35,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 2881 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:58:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2022-07-22 16:58:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2513. [2022-07-22 16:58:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 1921 states have (on average 1.5528370640291516) internal successors, (2983), 1998 states have internal predecessors, (2983), 447 states have call successors, (447), 134 states have call predecessors, (447), 144 states have return successors, (531), 441 states have call predecessors, (531), 443 states have call successors, (531) [2022-07-22 16:58:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3961 transitions. [2022-07-22 16:58:35,717 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3961 transitions. Word has length 158 [2022-07-22 16:58:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:35,717 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3961 transitions. [2022-07-22 16:58:35,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-22 16:58:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3961 transitions. [2022-07-22 16:58:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 16:58:35,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:35,726 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:58:35,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 16:58:35,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 16:58:35,952 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 449178967, now seen corresponding path program 1 times [2022-07-22 16:58:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:35,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33316833] [2022-07-22 16:58:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 16:58:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 16:58:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 16:58:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 16:58:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-22 16:58:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-22 16:58:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-07-22 16:58:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-22 16:58:36,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33316833] [2022-07-22 16:58:36,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33316833] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:58:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883442128] [2022-07-22 16:58:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:36,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:58:36,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:58:36,394 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:58:36,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:58:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:36,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 16:58:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:58:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 16:58:36,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:58:36,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883442128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:36,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:58:36,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 18 [2022-07-22 16:58:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275615227] [2022-07-22 16:58:36,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:36,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:58:36,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:36,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:58:36,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:58:36,940 INFO L87 Difference]: Start difference. First operand 2513 states and 3961 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 16:58:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:37,577 INFO L93 Difference]: Finished difference Result 4884 states and 7910 transitions. [2022-07-22 16:58:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:58:37,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2022-07-22 16:58:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:37,589 INFO L225 Difference]: With dead ends: 4884 [2022-07-22 16:58:37,590 INFO L226 Difference]: Without dead ends: 2545 [2022-07-22 16:58:37,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:58:37,601 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 913 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:37,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 2415 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:58:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2022-07-22 16:58:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2545. [2022-07-22 16:58:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 1949 states have (on average 1.555156490507953) internal successors, (3031), 2026 states have internal predecessors, (3031), 447 states have call successors, (447), 138 states have call predecessors, (447), 148 states have return successors, (535), 441 states have call predecessors, (535), 443 states have call successors, (535) [2022-07-22 16:58:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 4013 transitions. [2022-07-22 16:58:37,868 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 4013 transitions. Word has length 157 [2022-07-22 16:58:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:37,869 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 4013 transitions. [2022-07-22 16:58:37,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 16:58:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 4013 transitions. [2022-07-22 16:58:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-22 16:58:37,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:37,877 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:58:37,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 16:58:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 16:58:38,099 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash -338987438, now seen corresponding path program 1 times [2022-07-22 16:58:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055291101] [2022-07-22 16:58:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 16:58:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 16:58:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 16:58:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 16:58:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-22 16:58:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-22 16:58:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 16:58:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-22 16:58:38,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:38,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055291101] [2022-07-22 16:58:38,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055291101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:58:38,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812155375] [2022-07-22 16:58:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:38,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:58:38,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:58:38,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:58:38,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:58:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 16:58:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:58:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-22 16:58:38,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:58:38,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812155375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:38,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:58:38,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-07-22 16:58:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709007035] [2022-07-22 16:58:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:38,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:58:38,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:58:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:58:38,862 INFO L87 Difference]: Start difference. First operand 2545 states and 4013 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 16:58:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:39,543 INFO L93 Difference]: Finished difference Result 4948 states and 8002 transitions. [2022-07-22 16:58:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:58:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 160 [2022-07-22 16:58:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:39,557 INFO L225 Difference]: With dead ends: 4948 [2022-07-22 16:58:39,557 INFO L226 Difference]: Without dead ends: 2577 [2022-07-22 16:58:39,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:58:39,568 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 906 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:39,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 2415 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:58:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2022-07-22 16:58:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2022-07-22 16:58:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 1977 states have (on average 1.5574102175012645) internal successors, (3079), 2054 states have internal predecessors, (3079), 447 states have call successors, (447), 142 states have call predecessors, (447), 152 states have return successors, (539), 441 states have call predecessors, (539), 443 states have call successors, (539) [2022-07-22 16:58:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4065 transitions. [2022-07-22 16:58:39,758 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4065 transitions. Word has length 160 [2022-07-22 16:58:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:39,759 INFO L495 AbstractCegarLoop]: Abstraction has 2577 states and 4065 transitions. [2022-07-22 16:58:39,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 16:58:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4065 transitions. [2022-07-22 16:58:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-22 16:58:39,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:39,766 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:58:39,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 16:58:39,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:58:39,990 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1335044211, now seen corresponding path program 1 times [2022-07-22 16:58:39,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:39,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109195574] [2022-07-22 16:58:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:39,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 16:58:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 16:58:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 16:58:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-22 16:58:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 16:58:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-22 16:58:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-07-22 16:58:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-22 16:58:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:40,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109195574] [2022-07-22 16:58:40,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109195574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:58:40,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826953576] [2022-07-22 16:58:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:40,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:58:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:58:40,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:58:40,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:58:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 16:58:40,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:58:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-22 16:58:40,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:58:40,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826953576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:40,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:58:40,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-07-22 16:58:40,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507612359] [2022-07-22 16:58:40,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:40,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:58:40,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:58:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:58:40,725 INFO L87 Difference]: Start difference. First operand 2577 states and 4065 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 16:58:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:41,323 INFO L93 Difference]: Finished difference Result 5012 states and 8094 transitions. [2022-07-22 16:58:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:58:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2022-07-22 16:58:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:41,334 INFO L225 Difference]: With dead ends: 5012 [2022-07-22 16:58:41,334 INFO L226 Difference]: Without dead ends: 2609 [2022-07-22 16:58:41,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:58:41,345 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 921 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:41,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 2415 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:58:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2022-07-22 16:58:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2609. [2022-07-22 16:58:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2005 states have (on average 1.5596009975062344) internal successors, (3127), 2082 states have internal predecessors, (3127), 447 states have call successors, (447), 146 states have call predecessors, (447), 156 states have return successors, (543), 441 states have call predecessors, (543), 443 states have call successors, (543) [2022-07-22 16:58:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 4117 transitions. [2022-07-22 16:58:41,552 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 4117 transitions. Word has length 163 [2022-07-22 16:58:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:41,552 INFO L495 AbstractCegarLoop]: Abstraction has 2609 states and 4117 transitions. [2022-07-22 16:58:41,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 16:58:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 4117 transitions. [2022-07-22 16:58:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-22 16:58:41,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:41,559 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:58:41,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:58:41,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:58:41,784 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash 390658598, now seen corresponding path program 1 times [2022-07-22 16:58:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404664806] [2022-07-22 16:58:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:41,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:41,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:41,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:41,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 16:58:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 16:58:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 16:58:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 16:58:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-22 16:58:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-22 16:58:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-22 16:58:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 16:58:42,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:42,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404664806] [2022-07-22 16:58:42,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404664806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:58:42,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032953253] [2022-07-22 16:58:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:42,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:58:42,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:58:42,132 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:58:42,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:58:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:42,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 16:58:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:58:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 16:58:42,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:58:42,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032953253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:42,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:58:42,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-07-22 16:58:42,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44736441] [2022-07-22 16:58:42,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:42,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:58:42,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:58:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:58:42,525 INFO L87 Difference]: Start difference. First operand 2609 states and 4117 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 16:58:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:43,083 INFO L93 Difference]: Finished difference Result 5076 states and 8186 transitions. [2022-07-22 16:58:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:58:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 166 [2022-07-22 16:58:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:43,093 INFO L225 Difference]: With dead ends: 5076 [2022-07-22 16:58:43,093 INFO L226 Difference]: Without dead ends: 2641 [2022-07-22 16:58:43,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:58:43,125 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 919 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:43,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 2415 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:58:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2022-07-22 16:58:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2641. [2022-07-22 16:58:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2033 states have (on average 1.5617314313821937) internal successors, (3175), 2110 states have internal predecessors, (3175), 447 states have call successors, (447), 150 states have call predecessors, (447), 160 states have return successors, (547), 441 states have call predecessors, (547), 443 states have call successors, (547) [2022-07-22 16:58:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4169 transitions. [2022-07-22 16:58:43,301 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4169 transitions. Word has length 166 [2022-07-22 16:58:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:43,302 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 4169 transitions. [2022-07-22 16:58:43,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 16:58:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4169 transitions. [2022-07-22 16:58:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-22 16:58:43,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:43,308 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:58:43,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 16:58:43,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 16:58:43,510 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1618075023, now seen corresponding path program 1 times [2022-07-22 16:58:43,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:43,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425519999] [2022-07-22 16:58:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:43,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 16:58:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 16:58:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-07-22 16:58:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-07-22 16:58:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-07-22 16:58:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 16:58:43,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:43,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425519999] [2022-07-22 16:58:43,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425519999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:58:43,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974013483] [2022-07-22 16:58:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:43,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:58:43,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:58:43,934 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:58:43,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:58:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:44,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 16:58:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:58:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 16:58:44,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:58:44,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974013483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:44,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:58:44,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2022-07-22 16:58:44,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640572926] [2022-07-22 16:58:44,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:44,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 16:58:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 16:58:44,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:58:44,325 INFO L87 Difference]: Start difference. First operand 2641 states and 4169 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 4 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 16:58:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:58:48,425 INFO L93 Difference]: Finished difference Result 10559 states and 17159 transitions. [2022-07-22 16:58:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 16:58:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 4 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 169 [2022-07-22 16:58:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:58:48,461 INFO L225 Difference]: With dead ends: 10559 [2022-07-22 16:58:48,461 INFO L226 Difference]: Without dead ends: 8094 [2022-07-22 16:58:48,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-07-22 16:58:48,472 INFO L413 NwaCegarLoop]: 1730 mSDtfsCounter, 2954 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 6330 mSolverCounterSat, 991 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3069 SdHoareTripleChecker+Valid, 3144 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 991 IncrementalHoareTripleChecker+Valid, 6330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:58:48,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3069 Valid, 3144 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [991 Valid, 6330 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-22 16:58:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8094 states. [2022-07-22 16:58:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8094 to 7666. [2022-07-22 16:58:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 5832 states have (on average 1.5768175582990398) internal successors, (9196), 6071 states have internal predecessors, (9196), 1328 states have call successors, (1328), 426 states have call predecessors, (1328), 505 states have return successors, (1863), 1348 states have call predecessors, (1863), 1320 states have call successors, (1863) [2022-07-22 16:58:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 12387 transitions. [2022-07-22 16:58:49,045 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 12387 transitions. Word has length 169 [2022-07-22 16:58:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:58:49,046 INFO L495 AbstractCegarLoop]: Abstraction has 7666 states and 12387 transitions. [2022-07-22 16:58:49,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 4 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 16:58:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 12387 transitions. [2022-07-22 16:58:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-22 16:58:49,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:58:49,053 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:58:49,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 16:58:49,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 16:58:49,258 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:58:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:58:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2008486829, now seen corresponding path program 1 times [2022-07-22 16:58:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:58:49,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288622201] [2022-07-22 16:58:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:58:49,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:58:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:58:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:58:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:58:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:58:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:58:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:58:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:58:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 16:58:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:58:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 16:58:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:58:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-22 16:58:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:58:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-22 16:58:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-22 16:58:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:58:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 16:58:49,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:58:49,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288622201] [2022-07-22 16:58:49,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288622201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:58:49,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:58:49,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 16:58:49,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525913598] [2022-07-22 16:58:49,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:58:49,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 16:58:49,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:58:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 16:58:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 16:58:49,578 INFO L87 Difference]: Start difference. First operand 7666 states and 12387 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 16:59:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:59:07,321 INFO L93 Difference]: Finished difference Result 35310 states and 60442 transitions. [2022-07-22 16:59:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 16:59:07,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 174 [2022-07-22 16:59:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:59:07,497 INFO L225 Difference]: With dead ends: 35310 [2022-07-22 16:59:07,497 INFO L226 Difference]: Without dead ends: 27824 [2022-07-22 16:59:07,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-07-22 16:59:07,539 INFO L413 NwaCegarLoop]: 1817 mSDtfsCounter, 6131 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 6944 mSolverCounterSat, 4255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6201 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 11199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4255 IncrementalHoareTripleChecker+Valid, 6944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:59:07,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6201 Valid, 3280 Invalid, 11199 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4255 Valid, 6944 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-07-22 16:59:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27824 states. [2022-07-22 16:59:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27824 to 7684. [2022-07-22 16:59:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7684 states, 5838 states have (on average 1.5748544021925317) internal successors, (9194), 6073 states have internal predecessors, (9194), 1334 states have call successors, (1334), 426 states have call predecessors, (1334), 511 states have return successors, (1868), 1358 states have call predecessors, (1868), 1326 states have call successors, (1868) [2022-07-22 16:59:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 12396 transitions. [2022-07-22 16:59:08,837 INFO L78 Accepts]: Start accepts. Automaton has 7684 states and 12396 transitions. Word has length 174 [2022-07-22 16:59:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:59:08,839 INFO L495 AbstractCegarLoop]: Abstraction has 7684 states and 12396 transitions. [2022-07-22 16:59:08,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 6 states have internal predecessors, (96), 4 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 16:59:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 7684 states and 12396 transitions. [2022-07-22 16:59:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-22 16:59:08,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:59:08,845 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:59:08,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 16:59:08,845 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:59:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:59:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1257121169, now seen corresponding path program 1 times [2022-07-22 16:59:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:59:08,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885587090] [2022-07-22 16:59:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:08,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:59:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:59:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:59:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:59:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:59:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:59:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:59:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:59:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 16:59:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 16:59:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-22 16:59:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-22 16:59:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-22 16:59:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 16:59:09,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:59:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885587090] [2022-07-22 16:59:09,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885587090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:59:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033624198] [2022-07-22 16:59:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:09,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:59:09,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:59:09,380 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:59:09,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:59:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:59:09,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:59:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 16:59:09,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:59:09,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033624198] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:59:09,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:59:09,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-07-22 16:59:09,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243615829] [2022-07-22 16:59:09,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:59:09,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 16:59:09,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:59:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 16:59:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:59:09,772 INFO L87 Difference]: Start difference. First operand 7684 states and 12396 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-22 16:59:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:59:11,199 INFO L93 Difference]: Finished difference Result 19531 states and 31593 transitions. [2022-07-22 16:59:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 16:59:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 174 [2022-07-22 16:59:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:59:11,251 INFO L225 Difference]: With dead ends: 19531 [2022-07-22 16:59:11,252 INFO L226 Difference]: Without dead ends: 12031 [2022-07-22 16:59:11,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-07-22 16:59:11,279 INFO L413 NwaCegarLoop]: 1224 mSDtfsCounter, 432 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 5748 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:59:11,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 5748 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:59:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12031 states. [2022-07-22 16:59:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12031 to 11983. [2022-07-22 16:59:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11983 states, 9140 states have (on average 1.5447483588621445) internal successors, (14119), 9407 states have internal predecessors, (14119), 2008 states have call successors, (2008), 718 states have call predecessors, (2008), 834 states have return successors, (3054), 2031 states have call predecessors, (3054), 1992 states have call successors, (3054) [2022-07-22 16:59:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11983 states to 11983 states and 19181 transitions. [2022-07-22 16:59:12,583 INFO L78 Accepts]: Start accepts. Automaton has 11983 states and 19181 transitions. Word has length 174 [2022-07-22 16:59:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:59:12,584 INFO L495 AbstractCegarLoop]: Abstraction has 11983 states and 19181 transitions. [2022-07-22 16:59:12,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-22 16:59:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 11983 states and 19181 transitions. [2022-07-22 16:59:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-22 16:59:12,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:59:12,592 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:59:12,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 16:59:12,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:59:12,801 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:59:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:59:12,801 INFO L85 PathProgramCache]: Analyzing trace with hash -820215729, now seen corresponding path program 1 times [2022-07-22 16:59:12,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:59:12,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458856046] [2022-07-22 16:59:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:12,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:59:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:12,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:59:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:12,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:59:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:12,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:59:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:12,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:12,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:59:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:12,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:59:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:12,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:59:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:59:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 16:59:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 16:59:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-22 16:59:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-22 16:59:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-22 16:59:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 16:59:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:59:13,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458856046] [2022-07-22 16:59:13,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458856046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:59:13,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145381736] [2022-07-22 16:59:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:13,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:59:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:59:13,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:59:13,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:59:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:13,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:59:13,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:59:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 16:59:13,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:59:13,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145381736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:59:13,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:59:13,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-07-22 16:59:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039559560] [2022-07-22 16:59:13,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:59:13,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 16:59:13,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:59:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 16:59:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:59:13,651 INFO L87 Difference]: Start difference. First operand 11983 states and 19181 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (24), 5 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 16:59:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:59:16,330 INFO L93 Difference]: Finished difference Result 23822 states and 38424 transitions. [2022-07-22 16:59:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:59:16,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (24), 5 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 174 [2022-07-22 16:59:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:59:16,386 INFO L225 Difference]: With dead ends: 23822 [2022-07-22 16:59:16,387 INFO L226 Difference]: Without dead ends: 12023 [2022-07-22 16:59:16,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:59:16,418 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 1909 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2026 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:59:16,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2026 Valid, 1628 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 16:59:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12023 states. [2022-07-22 16:59:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12023 to 11363. [2022-07-22 16:59:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11363 states, 8290 states have (on average 1.5224366706875754) internal successors, (12621), 8709 states have internal predecessors, (12621), 2306 states have call successors, (2306), 638 states have call predecessors, (2306), 766 states have return successors, (3286), 2333 states have call predecessors, (3286), 2290 states have call successors, (3286) [2022-07-22 16:59:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18213 transitions. [2022-07-22 16:59:17,739 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18213 transitions. Word has length 174 [2022-07-22 16:59:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:59:17,739 INFO L495 AbstractCegarLoop]: Abstraction has 11363 states and 18213 transitions. [2022-07-22 16:59:17,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (24), 5 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-07-22 16:59:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18213 transitions. [2022-07-22 16:59:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-22 16:59:17,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:59:17,747 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:59:17,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 16:59:17,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:59:17,948 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:59:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:59:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1485693963, now seen corresponding path program 1 times [2022-07-22 16:59:17,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:59:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643371425] [2022-07-22 16:59:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:17,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:59:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:17,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:59:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:59:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:17,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:59:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:17,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:59:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:59:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:59:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:59:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 16:59:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 16:59:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 16:59:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 16:59:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 16:59:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-22 16:59:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-22 16:59:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-07-22 16:59:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-22 16:59:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-07-22 16:59:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 16:59:18,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:59:18,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643371425] [2022-07-22 16:59:18,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643371425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:59:18,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:59:18,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 16:59:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521564720] [2022-07-22 16:59:18,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:59:18,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 16:59:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:59:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 16:59:18,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:59:18,328 INFO L87 Difference]: Start difference. First operand 11363 states and 18213 transitions. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2022-07-22 16:59:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:59:33,819 INFO L93 Difference]: Finished difference Result 47553 states and 83374 transitions. [2022-07-22 16:59:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 16:59:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 195 [2022-07-22 16:59:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:59:34,078 INFO L225 Difference]: With dead ends: 47553 [2022-07-22 16:59:34,078 INFO L226 Difference]: Without dead ends: 36368 [2022-07-22 16:59:34,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-07-22 16:59:34,129 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 4007 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 6990 mSolverCounterSat, 1817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4198 SdHoareTripleChecker+Valid, 2940 SdHoareTripleChecker+Invalid, 8807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1817 IncrementalHoareTripleChecker+Valid, 6990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:59:34,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4198 Valid, 2940 Invalid, 8807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1817 Valid, 6990 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-07-22 16:59:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2022-07-22 16:59:36,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 11435. [2022-07-22 16:59:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11435 states, 8362 states have (on average 1.5179382922745754) internal successors, (12693), 8781 states have internal predecessors, (12693), 2306 states have call successors, (2306), 638 states have call predecessors, (2306), 766 states have return successors, (3286), 2333 states have call predecessors, (3286), 2290 states have call successors, (3286) [2022-07-22 16:59:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11435 states to 11435 states and 18285 transitions. [2022-07-22 16:59:36,143 INFO L78 Accepts]: Start accepts. Automaton has 11435 states and 18285 transitions. Word has length 195 [2022-07-22 16:59:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:59:36,144 INFO L495 AbstractCegarLoop]: Abstraction has 11435 states and 18285 transitions. [2022-07-22 16:59:36,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2022-07-22 16:59:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11435 states and 18285 transitions. [2022-07-22 16:59:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-07-22 16:59:36,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:59:36,154 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:59:36,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 16:59:36,155 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:59:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:59:36,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1659859167, now seen corresponding path program 1 times [2022-07-22 16:59:36,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:59:36,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845813710] [2022-07-22 16:59:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:36,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:59:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:59:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:59:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:59:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:59:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:59:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:59:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:59:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 16:59:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 16:59:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 16:59:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 16:59:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 16:59:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-22 16:59:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 16:59:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-22 16:59:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-07-22 16:59:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-07-22 16:59:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-07-22 16:59:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 16:59:36,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:59:36,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845813710] [2022-07-22 16:59:36,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845813710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:59:36,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135674848] [2022-07-22 16:59:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:36,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:59:36,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:59:36,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:59:36,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:59:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:36,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:59:36,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:59:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-22 16:59:37,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:59:37,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135674848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:59:37,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:59:37,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 25 [2022-07-22 16:59:37,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178248359] [2022-07-22 16:59:37,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:59:37,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 16:59:37,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:59:37,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 16:59:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-07-22 16:59:37,621 INFO L87 Difference]: Start difference. First operand 11435 states and 18285 transitions. Second operand has 10 states, 10 states have (on average 13.1) internal successors, (131), 8 states have internal predecessors, (131), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-07-22 16:59:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:59:47,862 INFO L93 Difference]: Finished difference Result 45391 states and 75848 transitions. [2022-07-22 16:59:47,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 16:59:47,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 8 states have internal predecessors, (131), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 213 [2022-07-22 16:59:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:59:48,008 INFO L225 Difference]: With dead ends: 45391 [2022-07-22 16:59:48,008 INFO L226 Difference]: Without dead ends: 34130 [2022-07-22 16:59:48,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 16:59:48,066 INFO L413 NwaCegarLoop]: 1582 mSDtfsCounter, 2950 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 9521 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3167 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 10488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 9521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:59:48,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3167 Valid, 3294 Invalid, 10488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 9521 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-22 16:59:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34130 states. [2022-07-22 16:59:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34130 to 32248. [2022-07-22 16:59:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32248 states, 23294 states have (on average 1.5094874216536447) internal successors, (35162), 24679 states have internal predecessors, (35162), 6870 states have call successors, (6870), 1794 states have call predecessors, (6870), 2083 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-22 16:59:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32248 states to 32248 states and 52157 transitions. [2022-07-22 16:59:53,209 INFO L78 Accepts]: Start accepts. Automaton has 32248 states and 52157 transitions. Word has length 213 [2022-07-22 16:59:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:59:53,210 INFO L495 AbstractCegarLoop]: Abstraction has 32248 states and 52157 transitions. [2022-07-22 16:59:53,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 8 states have internal predecessors, (131), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-07-22 16:59:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 32248 states and 52157 transitions. [2022-07-22 16:59:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-22 16:59:53,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:59:53,215 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:59:53,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 16:59:53,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:59:53,416 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:59:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:59:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2058252265, now seen corresponding path program 1 times [2022-07-22 16:59:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:59:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835735933] [2022-07-22 16:59:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:59:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 16:59:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:59:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:59:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 16:59:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 16:59:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 16:59:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:59:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:59:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:59:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 16:59:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 16:59:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 16:59:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 16:59:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 16:59:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 16:59:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-22 16:59:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-07-22 16:59:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 16:59:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-07-22 16:59:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-07-22 16:59:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-22 16:59:53,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:59:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835735933] [2022-07-22 16:59:53,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835735933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:59:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469238629] [2022-07-22 16:59:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:59:53,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:59:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:59:53,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:59:53,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 16:59:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:59:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 16:59:53,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:59:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-22 16:59:54,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:59:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469238629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:59:54,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:59:54,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-07-22 16:59:54,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639507397] [2022-07-22 16:59:54,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:59:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 16:59:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:59:54,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 16:59:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:59:54,146 INFO L87 Difference]: Start difference. First operand 32248 states and 52157 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 16:59:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:59:59,359 INFO L93 Difference]: Finished difference Result 65718 states and 107620 transitions. [2022-07-22 16:59:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:59:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 207 [2022-07-22 16:59:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:59:59,564 INFO L225 Difference]: With dead ends: 65718 [2022-07-22 16:59:59,565 INFO L226 Difference]: Without dead ends: 33652 [2022-07-22 16:59:59,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:59:59,726 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 213 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:59:59,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2736 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:59:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33652 states. [2022-07-22 17:00:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33652 to 33652. [2022-07-22 17:00:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33652 states, 24662 states have (on average 1.5323169248236153) internal successors, (37790), 26047 states have internal predecessors, (37790), 6870 states have call successors, (6870), 1830 states have call predecessors, (6870), 2119 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-22 17:00:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33652 states to 33652 states and 54785 transitions. [2022-07-22 17:00:04,602 INFO L78 Accepts]: Start accepts. Automaton has 33652 states and 54785 transitions. Word has length 207 [2022-07-22 17:00:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:00:04,602 INFO L495 AbstractCegarLoop]: Abstraction has 33652 states and 54785 transitions. [2022-07-22 17:00:04,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 17:00:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 33652 states and 54785 transitions. [2022-07-22 17:00:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-22 17:00:04,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:00:04,609 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:00:04,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 17:00:04,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-22 17:00:04,810 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:00:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:00:04,810 INFO L85 PathProgramCache]: Analyzing trace with hash 549803331, now seen corresponding path program 1 times [2022-07-22 17:00:04,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:00:04,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108496527] [2022-07-22 17:00:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:00:04,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:00:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:04,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:00:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:04,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 17:00:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:04,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:00:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:04,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:00:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:04,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 17:00:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:04,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 17:00:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:04,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:04,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 17:00:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 17:00:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:00:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:00:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:00:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:00:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 17:00:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 17:00:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 17:00:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 17:00:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-22 17:00:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-22 17:00:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-07-22 17:00:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-07-22 17:00:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-07-22 17:00:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 17:00:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:00:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108496527] [2022-07-22 17:00:05,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108496527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:00:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797464279] [2022-07-22 17:00:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:00:05,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:00:05,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:00:05,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:00:05,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 17:00:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:05,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 17:00:05,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:00:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-22 17:00:05,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 17:00:05,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797464279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:00:05,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 17:00:05,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-07-22 17:00:05,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115543762] [2022-07-22 17:00:05,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:00:05,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 17:00:05,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:00:05,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 17:00:05,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 17:00:05,456 INFO L87 Difference]: Start difference. First operand 33652 states and 54785 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 17:00:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:00:11,167 INFO L93 Difference]: Finished difference Result 68526 states and 112792 transitions. [2022-07-22 17:00:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 17:00:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 212 [2022-07-22 17:00:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:00:11,318 INFO L225 Difference]: With dead ends: 68526 [2022-07-22 17:00:11,318 INFO L226 Difference]: Without dead ends: 35056 [2022-07-22 17:00:11,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-22 17:00:11,424 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 211 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:00:11,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 2736 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 17:00:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35056 states. [2022-07-22 17:00:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35056 to 35056. [2022-07-22 17:00:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35056 states, 26030 states have (on average 1.5527468305801) internal successors, (40418), 27415 states have internal predecessors, (40418), 6870 states have call successors, (6870), 1866 states have call predecessors, (6870), 2155 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-22 17:00:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35056 states to 35056 states and 57413 transitions. [2022-07-22 17:00:16,968 INFO L78 Accepts]: Start accepts. Automaton has 35056 states and 57413 transitions. Word has length 212 [2022-07-22 17:00:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:00:16,968 INFO L495 AbstractCegarLoop]: Abstraction has 35056 states and 57413 transitions. [2022-07-22 17:00:16,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 17:00:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 35056 states and 57413 transitions. [2022-07-22 17:00:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-07-22 17:00:16,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:00:16,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:00:16,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 17:00:17,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-22 17:00:17,176 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:00:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:00:17,177 INFO L85 PathProgramCache]: Analyzing trace with hash -535406189, now seen corresponding path program 1 times [2022-07-22 17:00:17,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:00:17,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720239076] [2022-07-22 17:00:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:00:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:00:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:00:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 17:00:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:00:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:00:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 17:00:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 17:00:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 17:00:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 17:00:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:00:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:00:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:00:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:00:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 17:00:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 17:00:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-22 17:00:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-22 17:00:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 17:00:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 17:00:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-07-22 17:00:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-07-22 17:00:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-22 17:00:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 17:00:17,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:00:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720239076] [2022-07-22 17:00:17,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720239076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:00:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4028343] [2022-07-22 17:00:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:00:17,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:00:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:00:17,589 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:00:17,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 17:00:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 17:00:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:00:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 17:00:17,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 17:00:17,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4028343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:00:17,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 17:00:17,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-07-22 17:00:17,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125418440] [2022-07-22 17:00:17,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:00:17,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 17:00:17,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:00:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 17:00:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 17:00:17,904 INFO L87 Difference]: Start difference. First operand 35056 states and 57413 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 17:00:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:00:23,496 INFO L93 Difference]: Finished difference Result 71334 states and 117964 transitions. [2022-07-22 17:00:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 17:00:23,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 216 [2022-07-22 17:00:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:00:23,634 INFO L225 Difference]: With dead ends: 71334 [2022-07-22 17:00:23,634 INFO L226 Difference]: Without dead ends: 36460 [2022-07-22 17:00:23,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-22 17:00:23,729 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 209 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:00:23,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 2736 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 17:00:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36460 states. [2022-07-22 17:00:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36460 to 36460. [2022-07-22 17:00:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36460 states, 27398 states have (on average 1.5711365793123586) internal successors, (43046), 28783 states have internal predecessors, (43046), 6870 states have call successors, (6870), 1902 states have call predecessors, (6870), 2191 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-22 17:00:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36460 states to 36460 states and 60041 transitions. [2022-07-22 17:00:28,970 INFO L78 Accepts]: Start accepts. Automaton has 36460 states and 60041 transitions. Word has length 216 [2022-07-22 17:00:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:00:28,971 INFO L495 AbstractCegarLoop]: Abstraction has 36460 states and 60041 transitions. [2022-07-22 17:00:28,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 17:00:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 36460 states and 60041 transitions. [2022-07-22 17:00:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-22 17:00:28,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:00:28,980 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:00:28,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 17:00:29,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-22 17:00:29,181 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:00:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:00:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1401286473, now seen corresponding path program 1 times [2022-07-22 17:00:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:00:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912114923] [2022-07-22 17:00:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:00:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:00:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:00:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 17:00:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:00:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:00:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 17:00:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 17:00:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 17:00:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 17:00:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:00:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:00:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:00:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:00:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 17:00:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 17:00:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-22 17:00:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-22 17:00:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 17:00:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-22 17:00:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-07-22 17:00:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-07-22 17:00:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-07-22 17:00:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-22 17:00:29,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:00:29,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912114923] [2022-07-22 17:00:29,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912114923] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:00:29,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849702325] [2022-07-22 17:00:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:00:29,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:00:29,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:00:29,544 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:00:29,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 17:00:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 17:00:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:00:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 17:00:29,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 17:00:29,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849702325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:00:29,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 17:00:29,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-07-22 17:00:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883933801] [2022-07-22 17:00:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:00:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 17:00:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:00:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 17:00:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 17:00:29,881 INFO L87 Difference]: Start difference. First operand 36460 states and 60041 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 17:00:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:00:35,319 INFO L93 Difference]: Finished difference Result 74142 states and 123136 transitions. [2022-07-22 17:00:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 17:00:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 219 [2022-07-22 17:00:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:00:35,481 INFO L225 Difference]: With dead ends: 74142 [2022-07-22 17:00:35,482 INFO L226 Difference]: Without dead ends: 37864 [2022-07-22 17:00:35,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-22 17:00:35,734 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 207 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:00:35,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 2736 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 17:00:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37864 states. [2022-07-22 17:00:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37864 to 37864. [2022-07-22 17:00:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37864 states, 28766 states have (on average 1.5877772370159215) internal successors, (45674), 30151 states have internal predecessors, (45674), 6870 states have call successors, (6870), 1938 states have call predecessors, (6870), 2227 states have return successors, (10125), 6872 states have call predecessors, (10125), 6830 states have call successors, (10125) [2022-07-22 17:00:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37864 states to 37864 states and 62669 transitions. [2022-07-22 17:00:40,828 INFO L78 Accepts]: Start accepts. Automaton has 37864 states and 62669 transitions. Word has length 219 [2022-07-22 17:00:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:00:40,829 INFO L495 AbstractCegarLoop]: Abstraction has 37864 states and 62669 transitions. [2022-07-22 17:00:40,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 17:00:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 37864 states and 62669 transitions. [2022-07-22 17:00:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-22 17:00:40,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:00:40,837 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:00:40,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 17:00:41,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-22 17:00:41,038 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:00:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:00:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash -405837285, now seen corresponding path program 1 times [2022-07-22 17:00:41,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:00:41,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390202787] [2022-07-22 17:00:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:00:41,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:00:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:00:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 17:00:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 17:00:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:00:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 17:00:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 17:00:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 17:00:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 17:00:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:00:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:00:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:00:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:00:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 17:00:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 17:00:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-22 17:00:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-22 17:00:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 17:00:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-22 17:00:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-22 17:00:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 17:00:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-22 17:00:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-07-22 17:00:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 17:00:41,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:00:41,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390202787] [2022-07-22 17:00:41,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390202787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:00:41,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092432322] [2022-07-22 17:00:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:00:41,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:00:41,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:00:41,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:00:41,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 17:00:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:00:41,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 17:00:41,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:00:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 17:00:41,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 17:00:41,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092432322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:00:41,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 17:00:41,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2022-07-22 17:00:41,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643710295] [2022-07-22 17:00:41,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:00:41,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 17:00:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:00:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 17:00:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-22 17:00:41,972 INFO L87 Difference]: Start difference. First operand 37864 states and 62669 transitions. Second operand has 9 states, 9 states have (on average 15.222222222222221) internal successors, (137), 7 states have internal predecessors, (137), 4 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25)