./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_spec1_product21.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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:39:40,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:39:40,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:39:40,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:39:40,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:39:40,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:39:40,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:39:40,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:39:40,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:39:40,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:39:40,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:39:40,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:39:40,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:39:40,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:39:40,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:39:40,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:39:40,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:39:40,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:39:40,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:39:40,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:39:40,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:39:40,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:39:40,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:39:40,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:39:40,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:39:40,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:39:40,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:39:40,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:39:40,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:39:40,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:39:40,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:39:40,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:39:40,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:39:40,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:39:40,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:39:40,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:39:40,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:39:40,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:39:40,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:39:40,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:39:40,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:39:40,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:39:40,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:39:40,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:39:40,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:39:40,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:39:40,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:39:40,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:39:40,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:39:40,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:39:40,478 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:39:40,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:39:40,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:39:40,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:39:40,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:39:40,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:39:40,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:39:40,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:39:40,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:39:40,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:39:40,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:39:40,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:39:40,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:39:40,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:39:40,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:39:40,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:39:40,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:39:40,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:39:40,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:39:40,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:39:40,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:39:40,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:39:40,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:39:40,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:39:40,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:39:40,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:39:40,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-12-16 00:39:40,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:39:40,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:39:40,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:39:40,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:39:40,651 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:39:40,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-12-16 00:39:40,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2224a8a98/cf031012f3704ab19148396bf1bf67f0/FLAG8e7c303a7 [2021-12-16 00:39:41,137 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:39:41,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-12-16 00:39:41,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2224a8a98/cf031012f3704ab19148396bf1bf67f0/FLAG8e7c303a7 [2021-12-16 00:39:41,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2224a8a98/cf031012f3704ab19148396bf1bf67f0 [2021-12-16 00:39:41,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:39:41,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:39:41,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:39:41,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:39:41,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:39:41,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6482ea68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41, skipping insertion in model container [2021-12-16 00:39:41,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:39:41,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:39:41,536 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_spec1_product21.cil.c[66510,66523] [2021-12-16 00:39:41,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:39:41,549 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:39:41,670 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_spec1_product21.cil.c[66510,66523] [2021-12-16 00:39:41,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:39:41,690 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:39:41,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41 WrapperNode [2021-12-16 00:39:41,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:39:41,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:39:41,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:39:41,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:39:41,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,759 INFO L137 Inliner]: procedures = 92, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 850 [2021-12-16 00:39:41,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:39:41,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:39:41,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:39:41,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:39:41,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:39:41,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:39:41,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:39:41,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:39:41,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (1/1) ... [2021-12-16 00:39:41,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:39:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:41,906 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) [2021-12-16 00:39:41,944 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 [2021-12-16 00:39:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-16 00:39:41,955 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-16 00:39:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:39:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-16 00:39:41,955 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-16 00:39:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-12-16 00:39:41,955 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-12-16 00:39:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-16 00:39:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-16 00:39:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-16 00:39:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-16 00:39:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-16 00:39:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-16 00:39:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-16 00:39:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-16 00:39:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-16 00:39:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-16 00:39:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-12-16 00:39:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-12-16 00:39:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-16 00:39:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-16 00:39:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-16 00:39:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-16 00:39:41,958 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-16 00:39:41,958 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-16 00:39:41,958 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-16 00:39:41,958 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-16 00:39:41,958 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-12-16 00:39:41,958 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-12-16 00:39:41,958 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-16 00:39:41,958 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-16 00:39:41,958 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-16 00:39:41,959 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-16 00:39:41,959 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-16 00:39:41,959 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-16 00:39:41,959 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-16 00:39:41,959 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-16 00:39:41,959 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-16 00:39:41,959 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-16 00:39:41,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:39:41,960 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-16 00:39:41,960 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-16 00:39:41,960 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-16 00:39:41,960 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-16 00:39:41,960 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-16 00:39:41,960 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-16 00:39:41,960 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-16 00:39:41,960 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-16 00:39:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-12-16 00:39:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-12-16 00:39:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:39:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:39:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-16 00:39:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-16 00:39:42,124 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:39:42,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:39:42,786 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:39:42,798 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:39:42,799 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 00:39:42,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:39:42 BoogieIcfgContainer [2021-12-16 00:39:42,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:39:42,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:39:42,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:39:42,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:39:42,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:39:41" (1/3) ... [2021-12-16 00:39:42,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c86dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:39:42, skipping insertion in model container [2021-12-16 00:39:42,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:41" (2/3) ... [2021-12-16 00:39:42,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c86dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:39:42, skipping insertion in model container [2021-12-16 00:39:42,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:39:42" (3/3) ... [2021-12-16 00:39:42,807 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2021-12-16 00:39:42,813 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:39:42,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:39:42,850 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:39:42,856 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 00:39:42,856 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:39:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 570 states, 445 states have (on average 1.6898876404494383) internal successors, (752), 466 states have internal predecessors, (752), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-12-16 00:39:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 00:39:42,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:42,929 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:42,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash 679987401, now seen corresponding path program 1 times [2021-12-16 00:39:42,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:42,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878757049] [2021-12-16 00:39:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:42,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:39:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:39:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 00:39:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:43,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:43,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878757049] [2021-12-16 00:39:43,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878757049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:43,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088856818] [2021-12-16 00:39:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:43,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:43,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:43,603 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) [2021-12-16 00:39:43,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:39:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-16 00:39:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:39:44,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:44,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088856818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:44,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:44,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-12-16 00:39:44,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216618529] [2021-12-16 00:39:44,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:44,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:39:44,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:39:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:39:44,149 INFO L87 Difference]: Start difference. First operand has 570 states, 445 states have (on average 1.6898876404494383) internal successors, (752), 466 states have internal predecessors, (752), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-16 00:39:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:44,275 INFO L93 Difference]: Finished difference Result 591 states and 978 transitions. [2021-12-16 00:39:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:39:44,277 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 111 [2021-12-16 00:39:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:44,297 INFO L225 Difference]: With dead ends: 591 [2021-12-16 00:39:44,297 INFO L226 Difference]: Without dead ends: 562 [2021-12-16 00:39:44,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:39:44,302 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:44,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-16 00:39:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-12-16 00:39:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.6879271070615034) internal successors, (741), 458 states have internal predecessors, (741), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-16 00:39:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 932 transitions. [2021-12-16 00:39:44,365 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 932 transitions. Word has length 111 [2021-12-16 00:39:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:44,367 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 932 transitions. [2021-12-16 00:39:44,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-16 00:39:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 932 transitions. [2021-12-16 00:39:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 00:39:44,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:44,373 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:44,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 00:39:44,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-16 00:39:44,620 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2144316280, now seen corresponding path program 1 times [2021-12-16 00:39:44,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567948302] [2021-12-16 00:39:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:44,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:39:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:39:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 00:39:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:45,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:45,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567948302] [2021-12-16 00:39:45,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567948302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:45,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475388329] [2021-12-16 00:39:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:45,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:45,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:45,127 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) [2021-12-16 00:39:45,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:39:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:45,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:45,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475388329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:45,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:45,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:45,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694327328] [2021-12-16 00:39:45,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:45,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:45,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:45,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:45,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:45,799 INFO L87 Difference]: Start difference. First operand 562 states and 932 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:45,859 INFO L93 Difference]: Finished difference Result 1115 states and 1856 transitions. [2021-12-16 00:39:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2021-12-16 00:39:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:45,863 INFO L225 Difference]: With dead ends: 1115 [2021-12-16 00:39:45,863 INFO L226 Difference]: Without dead ends: 562 [2021-12-16 00:39:45,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:45,869 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 14 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:45,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2747 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-16 00:39:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-12-16 00:39:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.6856492027334853) internal successors, (740), 458 states have internal predecessors, (740), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-16 00:39:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 931 transitions. [2021-12-16 00:39:45,894 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 931 transitions. Word has length 113 [2021-12-16 00:39:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:45,894 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 931 transitions. [2021-12-16 00:39:45,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 931 transitions. [2021-12-16 00:39:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-16 00:39:45,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:45,898 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:45,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:46,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-16 00:39:46,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:46,114 INFO L85 PathProgramCache]: Analyzing trace with hash 219685296, now seen corresponding path program 1 times [2021-12-16 00:39:46,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:46,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593542770] [2021-12-16 00:39:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:46,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 00:39:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 00:39:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:46,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593542770] [2021-12-16 00:39:46,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593542770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:46,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70905230] [2021-12-16 00:39:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:46,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:46,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:46,541 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) [2021-12-16 00:39:46,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:39:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:47,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:47,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70905230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:47,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:47,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:47,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330889032] [2021-12-16 00:39:47,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:47,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:47,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:47,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:47,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:47,004 INFO L87 Difference]: Start difference. First operand 562 states and 931 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:47,060 INFO L93 Difference]: Finished difference Result 1115 states and 1854 transitions. [2021-12-16 00:39:47,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:47,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2021-12-16 00:39:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:47,064 INFO L225 Difference]: With dead ends: 1115 [2021-12-16 00:39:47,065 INFO L226 Difference]: Without dead ends: 562 [2021-12-16 00:39:47,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:47,067 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 12 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:47,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2747 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-16 00:39:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-12-16 00:39:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.683371298405467) internal successors, (739), 458 states have internal predecessors, (739), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-16 00:39:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 930 transitions. [2021-12-16 00:39:47,085 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 930 transitions. Word has length 115 [2021-12-16 00:39:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:47,086 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 930 transitions. [2021-12-16 00:39:47,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 930 transitions. [2021-12-16 00:39:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 00:39:47,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:47,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:47,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:47,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:47,308 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1262716040, now seen corresponding path program 1 times [2021-12-16 00:39:47,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:47,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218076236] [2021-12-16 00:39:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:47,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 00:39:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 00:39:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:47,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:47,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218076236] [2021-12-16 00:39:47,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218076236] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:47,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801608427] [2021-12-16 00:39:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:47,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:47,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:47,717 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) [2021-12-16 00:39:47,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:39:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:48,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:48,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801608427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:48,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:48,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:48,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224712425] [2021-12-16 00:39:48,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:48,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:48,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:48,321 INFO L87 Difference]: Start difference. First operand 562 states and 930 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:48,402 INFO L93 Difference]: Finished difference Result 1122 states and 1861 transitions. [2021-12-16 00:39:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-12-16 00:39:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:48,415 INFO L225 Difference]: With dead ends: 1122 [2021-12-16 00:39:48,415 INFO L226 Difference]: Without dead ends: 571 [2021-12-16 00:39:48,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:48,419 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 20 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:48,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2747 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-16 00:39:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-12-16 00:39:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 447 states have (on average 1.680089485458613) internal successors, (751), 466 states have internal predecessors, (751), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-16 00:39:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 942 transitions. [2021-12-16 00:39:48,456 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 942 transitions. Word has length 117 [2021-12-16 00:39:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:48,456 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 942 transitions. [2021-12-16 00:39:48,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 942 transitions. [2021-12-16 00:39:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 00:39:48,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:48,463 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:48,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:48,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:48,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash 559297322, now seen corresponding path program 1 times [2021-12-16 00:39:48,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:48,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876657186] [2021-12-16 00:39:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:48,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:48,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:48,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 00:39:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:48,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:39:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:48,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:48,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 00:39:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:49,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:49,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876657186] [2021-12-16 00:39:49,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876657186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:49,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144171099] [2021-12-16 00:39:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:49,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:49,168 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) [2021-12-16 00:39:49,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:39:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:49,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:49,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:49,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:49,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144171099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:49,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:49,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:49,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791782236] [2021-12-16 00:39:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:49,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:49,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:49,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:49,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:49,680 INFO L87 Difference]: Start difference. First operand 571 states and 942 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:49,724 INFO L93 Difference]: Finished difference Result 1124 states and 1862 transitions. [2021-12-16 00:39:49,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:49,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-12-16 00:39:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:49,727 INFO L225 Difference]: With dead ends: 1124 [2021-12-16 00:39:49,727 INFO L226 Difference]: Without dead ends: 571 [2021-12-16 00:39:49,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:49,729 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 18 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:49,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2747 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-16 00:39:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-12-16 00:39:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 447 states have (on average 1.6778523489932886) internal successors, (750), 466 states have internal predecessors, (750), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-16 00:39:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 941 transitions. [2021-12-16 00:39:49,743 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 941 transitions. Word has length 118 [2021-12-16 00:39:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:49,744 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 941 transitions. [2021-12-16 00:39:49,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 941 transitions. [2021-12-16 00:39:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 00:39:49,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:49,748 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:49,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 00:39:49,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:49,963 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1435315900, now seen corresponding path program 1 times [2021-12-16 00:39:49,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:49,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786855536] [2021-12-16 00:39:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:49,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 00:39:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 00:39:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:50,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:50,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786855536] [2021-12-16 00:39:50,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786855536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:50,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689611182] [2021-12-16 00:39:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:50,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:50,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:50,441 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) [2021-12-16 00:39:50,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:39:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:50,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:50,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:50,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689611182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:50,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:50,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:50,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233212003] [2021-12-16 00:39:50,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:50,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:50,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:50,975 INFO L87 Difference]: Start difference. First operand 571 states and 941 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:51,021 INFO L93 Difference]: Finished difference Result 1124 states and 1861 transitions. [2021-12-16 00:39:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:51,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-12-16 00:39:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:51,025 INFO L225 Difference]: With dead ends: 1124 [2021-12-16 00:39:51,025 INFO L226 Difference]: Without dead ends: 571 [2021-12-16 00:39:51,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:51,029 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 17 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:51,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2747 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-16 00:39:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-12-16 00:39:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 447 states have (on average 1.6756152125279642) internal successors, (749), 466 states have internal predecessors, (749), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-16 00:39:51,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 940 transitions. [2021-12-16 00:39:51,041 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 940 transitions. Word has length 119 [2021-12-16 00:39:51,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:51,041 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 940 transitions. [2021-12-16 00:39:51,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:51,042 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 940 transitions. [2021-12-16 00:39:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-16 00:39:51,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:51,045 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:51,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-16 00:39:51,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:51,264 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1244700050, now seen corresponding path program 1 times [2021-12-16 00:39:51,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:51,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011239408] [2021-12-16 00:39:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:51,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 00:39:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 00:39:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:51,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011239408] [2021-12-16 00:39:51,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011239408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341639127] [2021-12-16 00:39:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:51,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:51,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:51,688 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) [2021-12-16 00:39:51,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:39:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:39:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:52,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:52,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341639127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:52,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:52,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-16 00:39:52,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21518695] [2021-12-16 00:39:52,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:52,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:39:52,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:39:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:39:52,167 INFO L87 Difference]: Start difference. First operand 571 states and 940 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:39:52,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:52,244 INFO L93 Difference]: Finished difference Result 1143 states and 1891 transitions. [2021-12-16 00:39:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:39:52,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 120 [2021-12-16 00:39:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:52,248 INFO L225 Difference]: With dead ends: 1143 [2021-12-16 00:39:52,248 INFO L226 Difference]: Without dead ends: 594 [2021-12-16 00:39:52,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:39:52,250 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 148 mSDsluCounter, 4487 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5406 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:52,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5406 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-16 00:39:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 590. [2021-12-16 00:39:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 463 states have (on average 1.673866090712743) internal successors, (775), 484 states have internal predecessors, (775), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-12-16 00:39:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 971 transitions. [2021-12-16 00:39:52,265 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 971 transitions. Word has length 120 [2021-12-16 00:39:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:52,265 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 971 transitions. [2021-12-16 00:39:52,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:39:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 971 transitions. [2021-12-16 00:39:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-16 00:39:52,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:52,283 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:52,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:52,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:52,516 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash -113913425, now seen corresponding path program 1 times [2021-12-16 00:39:52,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:52,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448572714] [2021-12-16 00:39:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:52,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 00:39:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 00:39:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:52,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:52,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448572714] [2021-12-16 00:39:52,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448572714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:52,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893128449] [2021-12-16 00:39:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:52,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:52,876 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) [2021-12-16 00:39:52,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 00:39:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:53,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:53,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:53,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893128449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:53,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:53,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:53,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677508965] [2021-12-16 00:39:53,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:53,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:53,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:53,424 INFO L87 Difference]: Start difference. First operand 590 states and 971 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:53,517 INFO L93 Difference]: Finished difference Result 1184 states and 1965 transitions. [2021-12-16 00:39:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-12-16 00:39:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:53,520 INFO L225 Difference]: With dead ends: 1184 [2021-12-16 00:39:53,520 INFO L226 Difference]: Without dead ends: 590 [2021-12-16 00:39:53,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:53,522 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 135 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:53,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2564 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-12-16 00:39:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-12-16 00:39:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 463 states have (on average 1.6630669546436285) internal successors, (770), 484 states have internal predecessors, (770), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-12-16 00:39:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 966 transitions. [2021-12-16 00:39:53,553 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 966 transitions. Word has length 120 [2021-12-16 00:39:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:53,554 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 966 transitions. [2021-12-16 00:39:53,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 966 transitions. [2021-12-16 00:39:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-16 00:39:53,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:53,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:53,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:53,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 00:39:53,770 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1355283163, now seen corresponding path program 1 times [2021-12-16 00:39:53,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:53,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500494044] [2021-12-16 00:39:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:53,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:53,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:53,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:53,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:53,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 00:39:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:53,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:53,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:39:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:54,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:54,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500494044] [2021-12-16 00:39:54,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500494044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:54,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415214862] [2021-12-16 00:39:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:54,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:54,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:54,068 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) [2021-12-16 00:39:54,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 00:39:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:54,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:54,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415214862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:54,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:54,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:54,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500008439] [2021-12-16 00:39:54,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:54,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:54,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:54,531 INFO L87 Difference]: Start difference. First operand 590 states and 966 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:54,624 INFO L93 Difference]: Finished difference Result 1184 states and 1955 transitions. [2021-12-16 00:39:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 122 [2021-12-16 00:39:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:54,639 INFO L225 Difference]: With dead ends: 1184 [2021-12-16 00:39:54,639 INFO L226 Difference]: Without dead ends: 590 [2021-12-16 00:39:54,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:54,643 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 129 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:54,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2564 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-12-16 00:39:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-12-16 00:39:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 463 states have (on average 1.652267818574514) internal successors, (765), 484 states have internal predecessors, (765), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-12-16 00:39:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 961 transitions. [2021-12-16 00:39:54,657 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 961 transitions. Word has length 122 [2021-12-16 00:39:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:54,657 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 961 transitions. [2021-12-16 00:39:54,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:54,658 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 961 transitions. [2021-12-16 00:39:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-16 00:39:54,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:54,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:54,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:54,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:54,880 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:54,881 INFO L85 PathProgramCache]: Analyzing trace with hash -445953777, now seen corresponding path program 1 times [2021-12-16 00:39:54,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:54,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935475285] [2021-12-16 00:39:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:54,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 00:39:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 00:39:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:55,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:55,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935475285] [2021-12-16 00:39:55,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935475285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:55,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071392087] [2021-12-16 00:39:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:55,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:55,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:55,240 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) [2021-12-16 00:39:55,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 00:39:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:55,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:55,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:55,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071392087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:55,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:55,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:55,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446283195] [2021-12-16 00:39:55,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:55,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:55,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:55,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:55,726 INFO L87 Difference]: Start difference. First operand 590 states and 961 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:55,909 INFO L93 Difference]: Finished difference Result 1220 states and 2003 transitions. [2021-12-16 00:39:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2021-12-16 00:39:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:55,913 INFO L225 Difference]: With dead ends: 1220 [2021-12-16 00:39:55,913 INFO L226 Difference]: Without dead ends: 656 [2021-12-16 00:39:55,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:55,915 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 179 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:55,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2574 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 00:39:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-12-16 00:39:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 641. [2021-12-16 00:39:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 513 states have (on average 1.6569200779727096) internal successors, (850), 534 states have internal predecessors, (850), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-16 00:39:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1045 transitions. [2021-12-16 00:39:55,936 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1045 transitions. Word has length 124 [2021-12-16 00:39:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:55,936 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1045 transitions. [2021-12-16 00:39:55,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1045 transitions. [2021-12-16 00:39:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-16 00:39:55,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:55,940 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:55,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:56,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 00:39:56,158 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash -734352333, now seen corresponding path program 1 times [2021-12-16 00:39:56,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:56,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304373864] [2021-12-16 00:39:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:56,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 00:39:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:39:56,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304373864] [2021-12-16 00:39:56,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304373864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458190375] [2021-12-16 00:39:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:56,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:56,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:56,483 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) [2021-12-16 00:39:56,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 00:39:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:39:56,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:57,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:57,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458190375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:57,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:57,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-16 00:39:57,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270489465] [2021-12-16 00:39:57,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:57,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:39:57,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:39:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:39:57,022 INFO L87 Difference]: Start difference. First operand 641 states and 1045 transitions. Second operand has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:39:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:57,197 INFO L93 Difference]: Finished difference Result 1212 states and 1983 transitions. [2021-12-16 00:39:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:39:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2021-12-16 00:39:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:57,203 INFO L225 Difference]: With dead ends: 1212 [2021-12-16 00:39:57,203 INFO L226 Difference]: Without dead ends: 663 [2021-12-16 00:39:57,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:39:57,208 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 177 mSDsluCounter, 5292 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6191 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:57,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6191 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-12-16 00:39:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 641. [2021-12-16 00:39:57,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 513 states have (on average 1.6569200779727096) internal successors, (850), 534 states have internal predecessors, (850), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-16 00:39:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1045 transitions. [2021-12-16 00:39:57,227 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1045 transitions. Word has length 125 [2021-12-16 00:39:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:57,228 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1045 transitions. [2021-12-16 00:39:57,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:39:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1045 transitions. [2021-12-16 00:39:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-16 00:39:57,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:57,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:57,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:57,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 00:39:57,451 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:57,451 INFO L85 PathProgramCache]: Analyzing trace with hash 808708435, now seen corresponding path program 1 times [2021-12-16 00:39:57,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:57,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797848899] [2021-12-16 00:39:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:57,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 00:39:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:57,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:57,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797848899] [2021-12-16 00:39:57,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797848899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:57,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542846659] [2021-12-16 00:39:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:57,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:57,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:57,895 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) [2021-12-16 00:39:57,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 00:39:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:58,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:58,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542846659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:58,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:58,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:58,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238432635] [2021-12-16 00:39:58,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:58,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:58,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:58,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:58,471 INFO L87 Difference]: Start difference. First operand 641 states and 1045 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:58,689 INFO L93 Difference]: Finished difference Result 1220 states and 2001 transitions. [2021-12-16 00:39:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-12-16 00:39:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:58,695 INFO L225 Difference]: With dead ends: 1220 [2021-12-16 00:39:58,695 INFO L226 Difference]: Without dead ends: 641 [2021-12-16 00:39:58,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:58,698 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 173 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:58,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2574 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-16 00:39:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2021-12-16 00:39:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 513 states have (on average 1.6471734892787524) internal successors, (845), 534 states have internal predecessors, (845), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-16 00:39:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1040 transitions. [2021-12-16 00:39:58,743 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1040 transitions. Word has length 125 [2021-12-16 00:39:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:58,744 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1040 transitions. [2021-12-16 00:39:58,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1040 transitions. [2021-12-16 00:39:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-16 00:39:58,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:58,747 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:39:58,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:58,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 00:39:58,951 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1720935022, now seen corresponding path program 1 times [2021-12-16 00:39:58,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:58,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521246828] [2021-12-16 00:39:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:58,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 00:39:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:39:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:39:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:39:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:39:59,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:59,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521246828] [2021-12-16 00:39:59,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521246828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:59,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880378146] [2021-12-16 00:39:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:59,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:59,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:59,551 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) [2021-12-16 00:39:59,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 00:40:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:40:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:40:00,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:00,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880378146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:00,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:00,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-16 00:40:00,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641430835] [2021-12-16 00:40:00,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:00,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:40:00,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:40:00,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:40:00,359 INFO L87 Difference]: Start difference. First operand 641 states and 1040 transitions. Second operand has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:00,454 INFO L93 Difference]: Finished difference Result 1147 states and 1875 transitions. [2021-12-16 00:40:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:40:00,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2021-12-16 00:40:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:00,459 INFO L225 Difference]: With dead ends: 1147 [2021-12-16 00:40:00,470 INFO L226 Difference]: Without dead ends: 665 [2021-12-16 00:40:00,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:00,473 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 134 mSDsluCounter, 4454 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5365 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:00,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 5365 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:40:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-16 00:40:00,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 660. [2021-12-16 00:40:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 529 states have (on average 1.6465028355387523) internal successors, (871), 552 states have internal predecessors, (871), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1070 transitions. [2021-12-16 00:40:00,500 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1070 transitions. Word has length 125 [2021-12-16 00:40:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:00,500 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1070 transitions. [2021-12-16 00:40:00,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1070 transitions. [2021-12-16 00:40:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-16 00:40:00,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:00,521 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:40:00,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:00,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 00:40:00,734 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1643912305, now seen corresponding path program 1 times [2021-12-16 00:40:00,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:00,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393617812] [2021-12-16 00:40:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:00,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:40:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:40:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:40:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:40:01,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:01,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393617812] [2021-12-16 00:40:01,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393617812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:01,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266980756] [2021-12-16 00:40:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:01,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:01,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:01,230 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) [2021-12-16 00:40:01,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 00:40:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:40:01,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:40:01,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:01,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266980756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:01,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:01,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-16 00:40:01,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329409452] [2021-12-16 00:40:01,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:01,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:40:01,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:40:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:40:01,932 INFO L87 Difference]: Start difference. First operand 660 states and 1070 transitions. Second operand has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:02,005 INFO L93 Difference]: Finished difference Result 1177 states and 1926 transitions. [2021-12-16 00:40:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:40:02,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 126 [2021-12-16 00:40:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:02,009 INFO L225 Difference]: With dead ends: 1177 [2021-12-16 00:40:02,009 INFO L226 Difference]: Without dead ends: 695 [2021-12-16 00:40:02,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:02,011 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 143 mSDsluCounter, 4444 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5355 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:02,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5355 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:40:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-12-16 00:40:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 660. [2021-12-16 00:40:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 529 states have (on average 1.6465028355387523) internal successors, (871), 552 states have internal predecessors, (871), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1070 transitions. [2021-12-16 00:40:02,024 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1070 transitions. Word has length 126 [2021-12-16 00:40:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:02,024 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1070 transitions. [2021-12-16 00:40:02,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1070 transitions. [2021-12-16 00:40:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-16 00:40:02,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:02,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:02,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:02,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:02,242 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:02,242 INFO L85 PathProgramCache]: Analyzing trace with hash 677615857, now seen corresponding path program 1 times [2021-12-16 00:40:02,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:02,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280017020] [2021-12-16 00:40:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:02,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:40:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:40:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:40:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:40:02,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:02,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280017020] [2021-12-16 00:40:02,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280017020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:02,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102686505] [2021-12-16 00:40:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:02,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:02,660 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:02,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 00:40:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:02,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:40:02,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:40:03,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:03,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102686505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:03,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:03,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-16 00:40:03,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314378370] [2021-12-16 00:40:03,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:03,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:40:03,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:40:03,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:03,190 INFO L87 Difference]: Start difference. First operand 660 states and 1070 transitions. Second operand has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:03,302 INFO L93 Difference]: Finished difference Result 1162 states and 1900 transitions. [2021-12-16 00:40:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:40:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 126 [2021-12-16 00:40:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:03,305 INFO L225 Difference]: With dead ends: 1162 [2021-12-16 00:40:03,305 INFO L226 Difference]: Without dead ends: 680 [2021-12-16 00:40:03,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:40:03,309 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 177 mSDsluCounter, 5298 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6199 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:03,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6199 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:40:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-12-16 00:40:03,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 660. [2021-12-16 00:40:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 529 states have (on average 1.6465028355387523) internal successors, (871), 552 states have internal predecessors, (871), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1070 transitions. [2021-12-16 00:40:03,342 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1070 transitions. Word has length 126 [2021-12-16 00:40:03,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:03,342 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1070 transitions. [2021-12-16 00:40:03,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1070 transitions. [2021-12-16 00:40:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-16 00:40:03,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:03,347 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:40:03,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:03,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 00:40:03,568 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash -596460886, now seen corresponding path program 1 times [2021-12-16 00:40:03,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:03,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665023356] [2021-12-16 00:40:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:03,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 00:40:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:40:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:40:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:40:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:40:03,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:03,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665023356] [2021-12-16 00:40:03,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665023356] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:03,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603431507] [2021-12-16 00:40:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:03,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:03,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:03,907 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:03,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 00:40:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:40:04,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:40:04,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:04,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603431507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:04,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:04,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:40:04,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143565084] [2021-12-16 00:40:04,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:04,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:40:04,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:40:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:40:04,446 INFO L87 Difference]: Start difference. First operand 660 states and 1070 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:04,474 INFO L93 Difference]: Finished difference Result 1214 states and 1985 transitions. [2021-12-16 00:40:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:40:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 126 [2021-12-16 00:40:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:04,477 INFO L225 Difference]: With dead ends: 1214 [2021-12-16 00:40:04,477 INFO L226 Difference]: Without dead ends: 660 [2021-12-16 00:40:04,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:04,490 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 23 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:04,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2716 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:40:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-16 00:40:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2021-12-16 00:40:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 529 states have (on average 1.6389413988657846) internal successors, (867), 552 states have internal predecessors, (867), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1066 transitions. [2021-12-16 00:40:04,504 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1066 transitions. Word has length 126 [2021-12-16 00:40:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:04,504 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1066 transitions. [2021-12-16 00:40:04,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1066 transitions. [2021-12-16 00:40:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-16 00:40:04,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:04,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:04,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:04,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 00:40:04,723 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1996876662, now seen corresponding path program 1 times [2021-12-16 00:40:04,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600481762] [2021-12-16 00:40:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:04,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 00:40:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:40:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:40:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:40:04,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:04,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600481762] [2021-12-16 00:40:04,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600481762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:04,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498719881] [2021-12-16 00:40:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:04,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:05,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:05,001 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:05,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 00:40:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:05,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:40:05,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:40:05,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:05,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498719881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:05,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:05,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-16 00:40:05,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395664020] [2021-12-16 00:40:05,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:05,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:40:05,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:05,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:40:05,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:05,474 INFO L87 Difference]: Start difference. First operand 660 states and 1066 transitions. Second operand has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:05,580 INFO L93 Difference]: Finished difference Result 1162 states and 1897 transitions. [2021-12-16 00:40:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:40:05,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2021-12-16 00:40:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:05,583 INFO L225 Difference]: With dead ends: 1162 [2021-12-16 00:40:05,584 INFO L226 Difference]: Without dead ends: 680 [2021-12-16 00:40:05,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:40:05,586 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 185 mSDsluCounter, 5260 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6155 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:05,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6155 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:40:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-12-16 00:40:05,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 660. [2021-12-16 00:40:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 529 states have (on average 1.6389413988657846) internal successors, (867), 552 states have internal predecessors, (867), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1066 transitions. [2021-12-16 00:40:05,599 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1066 transitions. Word has length 127 [2021-12-16 00:40:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:05,600 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1066 transitions. [2021-12-16 00:40:05,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:05,600 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1066 transitions. [2021-12-16 00:40:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-16 00:40:05,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:05,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:05,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:05,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 00:40:05,824 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:05,825 INFO L85 PathProgramCache]: Analyzing trace with hash -238364266, now seen corresponding path program 1 times [2021-12-16 00:40:05,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:05,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889058679] [2021-12-16 00:40:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:05,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:05,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:40:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:40:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:40:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:40:06,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889058679] [2021-12-16 00:40:06,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889058679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111725254] [2021-12-16 00:40:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:06,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:06,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:06,265 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:06,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 00:40:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:40:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 00:40:06,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111725254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:06,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:06,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:40:06,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730103204] [2021-12-16 00:40:06,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:06,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:40:06,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:40:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:40:06,737 INFO L87 Difference]: Start difference. First operand 660 states and 1066 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:06,812 INFO L93 Difference]: Finished difference Result 1270 states and 2067 transitions. [2021-12-16 00:40:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:40:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 128 [2021-12-16 00:40:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:06,815 INFO L225 Difference]: With dead ends: 1270 [2021-12-16 00:40:06,825 INFO L226 Difference]: Without dead ends: 696 [2021-12-16 00:40:06,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:06,830 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 38 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:06,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2692 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:40:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-16 00:40:06,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 684. [2021-12-16 00:40:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 553 states have (on average 1.6184448462929475) internal successors, (895), 576 states have internal predecessors, (895), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1094 transitions. [2021-12-16 00:40:06,865 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1094 transitions. Word has length 128 [2021-12-16 00:40:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:06,865 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1094 transitions. [2021-12-16 00:40:06,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1094 transitions. [2021-12-16 00:40:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-16 00:40:06,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:06,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:06,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:07,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 00:40:07,086 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash -699426363, now seen corresponding path program 1 times [2021-12-16 00:40:07,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:07,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907616563] [2021-12-16 00:40:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:07,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:40:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:40:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:40:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:40:07,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907616563] [2021-12-16 00:40:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907616563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180103741] [2021-12-16 00:40:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:07,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:07,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:07,407 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:07,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 00:40:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 00:40:07,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:40:07,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:07,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180103741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:07,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:07,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-16 00:40:07,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110205278] [2021-12-16 00:40:07,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:07,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:40:07,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:40:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:07,882 INFO L87 Difference]: Start difference. First operand 684 states and 1094 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:08,076 INFO L93 Difference]: Finished difference Result 1282 states and 2099 transitions. [2021-12-16 00:40:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:40:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 128 [2021-12-16 00:40:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:08,079 INFO L225 Difference]: With dead ends: 1282 [2021-12-16 00:40:08,079 INFO L226 Difference]: Without dead ends: 805 [2021-12-16 00:40:08,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:40:08,082 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 324 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 3796 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:08,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 3796 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 00:40:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-12-16 00:40:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 687. [2021-12-16 00:40:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 556 states have (on average 1.6151079136690647) internal successors, (898), 579 states have internal predecessors, (898), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1097 transitions. [2021-12-16 00:40:08,099 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1097 transitions. Word has length 128 [2021-12-16 00:40:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:08,099 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1097 transitions. [2021-12-16 00:40:08,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1097 transitions. [2021-12-16 00:40:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-16 00:40:08,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:08,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:08,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-16 00:40:08,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:08,316 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:08,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1409829739, now seen corresponding path program 1 times [2021-12-16 00:40:08,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:08,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83126539] [2021-12-16 00:40:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:08,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:40:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:40:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 00:40:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:40:08,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:08,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83126539] [2021-12-16 00:40:08,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83126539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:08,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768537283] [2021-12-16 00:40:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:08,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:08,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:08,677 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:08,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 00:40:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:40:08,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 00:40:09,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:09,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768537283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:09,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:09,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 00:40:09,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117508338] [2021-12-16 00:40:09,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:09,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:40:09,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:09,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:40:09,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:09,337 INFO L87 Difference]: Start difference. First operand 687 states and 1097 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-16 00:40:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:09,674 INFO L93 Difference]: Finished difference Result 736 states and 1169 transitions. [2021-12-16 00:40:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:40:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2021-12-16 00:40:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:09,678 INFO L225 Difference]: With dead ends: 736 [2021-12-16 00:40:09,678 INFO L226 Difference]: Without dead ends: 721 [2021-12-16 00:40:09,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:09,679 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 851 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 2355 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:09,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 2355 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 00:40:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-16 00:40:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 690. [2021-12-16 00:40:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 559 states have (on average 1.6118067978533095) internal successors, (901), 582 states have internal predecessors, (901), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1100 transitions. [2021-12-16 00:40:09,693 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1100 transitions. Word has length 131 [2021-12-16 00:40:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:09,694 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1100 transitions. [2021-12-16 00:40:09,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-16 00:40:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1100 transitions. [2021-12-16 00:40:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-16 00:40:09,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:09,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:09,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:09,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:09,912 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash 283147014, now seen corresponding path program 1 times [2021-12-16 00:40:09,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:09,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637273606] [2021-12-16 00:40:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:09,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:40:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:40:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 00:40:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:40:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:40:10,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:10,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637273606] [2021-12-16 00:40:10,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637273606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:10,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415174686] [2021-12-16 00:40:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:10,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:10,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:10,267 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:10,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 00:40:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:40:10,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 00:40:10,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:10,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415174686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:10,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:10,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-16 00:40:10,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868806614] [2021-12-16 00:40:10,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:10,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:40:10,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:40:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:10,759 INFO L87 Difference]: Start difference. First operand 690 states and 1100 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-16 00:40:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:10,822 INFO L93 Difference]: Finished difference Result 707 states and 1121 transitions. [2021-12-16 00:40:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:40:10,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 137 [2021-12-16 00:40:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:10,826 INFO L225 Difference]: With dead ends: 707 [2021-12-16 00:40:10,826 INFO L226 Difference]: Without dead ends: 692 [2021-12-16 00:40:10,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:40:10,827 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 37 mSDsluCounter, 2712 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3632 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:10,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3632 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:40:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-12-16 00:40:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 690. [2021-12-16 00:40:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 559 states have (on average 1.6100178890876566) internal successors, (900), 582 states have internal predecessors, (900), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-12-16 00:40:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1099 transitions. [2021-12-16 00:40:10,859 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1099 transitions. Word has length 137 [2021-12-16 00:40:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:10,859 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1099 transitions. [2021-12-16 00:40:10,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2021-12-16 00:40:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1099 transitions. [2021-12-16 00:40:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-16 00:40:10,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:10,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:10,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:11,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:11,110 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:11,110 INFO L85 PathProgramCache]: Analyzing trace with hash -916984519, now seen corresponding path program 1 times [2021-12-16 00:40:11,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:11,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010103295] [2021-12-16 00:40:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:11,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:40:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:40:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 00:40:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:40:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 00:40:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:40:11,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010103295] [2021-12-16 00:40:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010103295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361157167] [2021-12-16 00:40:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:11,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:11,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:11,549 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:11,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 00:40:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:40:11,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:40:12,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:12,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361157167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:12,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:12,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:40:12,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940000695] [2021-12-16 00:40:12,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:12,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:40:12,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:12,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:40:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:40:12,056 INFO L87 Difference]: Start difference. First operand 690 states and 1099 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:12,113 INFO L93 Difference]: Finished difference Result 1354 states and 2168 transitions. [2021-12-16 00:40:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:40:12,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 148 [2021-12-16 00:40:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:12,116 INFO L225 Difference]: With dead ends: 1354 [2021-12-16 00:40:12,116 INFO L226 Difference]: Without dead ends: 659 [2021-12-16 00:40:12,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:12,122 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 11 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:12,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2715 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:40:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-12-16 00:40:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2021-12-16 00:40:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 531 states have (on average 1.6082862523540489) internal successors, (854), 552 states have internal predecessors, (854), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-16 00:40:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1049 transitions. [2021-12-16 00:40:12,183 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1049 transitions. Word has length 148 [2021-12-16 00:40:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:12,185 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1049 transitions. [2021-12-16 00:40:12,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1049 transitions. [2021-12-16 00:40:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-16 00:40:12,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:12,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:12,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:12,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:12,413 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:12,414 INFO L85 PathProgramCache]: Analyzing trace with hash -27296178, now seen corresponding path program 1 times [2021-12-16 00:40:12,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:12,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800047111] [2021-12-16 00:40:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:12,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 00:40:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:40:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:40:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 00:40:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:40:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 00:40:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:40:12,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800047111] [2021-12-16 00:40:12,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800047111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415558586] [2021-12-16 00:40:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:12,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:12,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:12,832 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:12,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 00:40:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1908 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 00:40:13,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 00:40:13,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:13,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415558586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:13,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-16 00:40:13,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354920450] [2021-12-16 00:40:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:13,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:40:13,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:40:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:40:13,471 INFO L87 Difference]: Start difference. First operand 659 states and 1049 transitions. Second operand has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-16 00:40:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:13,550 INFO L93 Difference]: Finished difference Result 1287 states and 2062 transitions. [2021-12-16 00:40:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:40:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 150 [2021-12-16 00:40:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:13,556 INFO L225 Difference]: With dead ends: 1287 [2021-12-16 00:40:13,556 INFO L226 Difference]: Without dead ends: 659 [2021-12-16 00:40:13,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:13,559 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 143 mSDsluCounter, 4459 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5385 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:13,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5385 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:40:13,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-12-16 00:40:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 638. [2021-12-16 00:40:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 510 states have (on average 1.607843137254902) internal successors, (820), 531 states have internal predecessors, (820), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-16 00:40:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1015 transitions. [2021-12-16 00:40:13,572 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1015 transitions. Word has length 150 [2021-12-16 00:40:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:13,573 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1015 transitions. [2021-12-16 00:40:13,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-16 00:40:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1015 transitions. [2021-12-16 00:40:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-16 00:40:13,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:13,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:13,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:13,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:13,795 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:13,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2034212499, now seen corresponding path program 1 times [2021-12-16 00:40:13,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:13,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541318991] [2021-12-16 00:40:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:13,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 00:40:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:40:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:40:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 00:40:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:40:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 00:40:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 00:40:14,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541318991] [2021-12-16 00:40:14,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541318991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549256437] [2021-12-16 00:40:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:14,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:14,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:14,340 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:14,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 00:40:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:40:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 00:40:14,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:14,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549256437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:14,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:14,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2021-12-16 00:40:14,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601495147] [2021-12-16 00:40:14,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:14,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:40:14,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:40:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:40:14,929 INFO L87 Difference]: Start difference. First operand 638 states and 1015 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:15,018 INFO L93 Difference]: Finished difference Result 1245 states and 1996 transitions. [2021-12-16 00:40:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:40:15,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-12-16 00:40:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:15,022 INFO L225 Difference]: With dead ends: 1245 [2021-12-16 00:40:15,023 INFO L226 Difference]: Without dead ends: 638 [2021-12-16 00:40:15,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:40:15,026 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 176 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:15,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2548 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:40:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-16 00:40:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2021-12-16 00:40:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 510 states have (on average 1.6058823529411765) internal successors, (819), 531 states have internal predecessors, (819), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-16 00:40:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1014 transitions. [2021-12-16 00:40:15,063 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1014 transitions. Word has length 152 [2021-12-16 00:40:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:15,065 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1014 transitions. [2021-12-16 00:40:15,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1014 transitions. [2021-12-16 00:40:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-16 00:40:15,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:15,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:15,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:15,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:15,287 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:15,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1039038885, now seen corresponding path program 1 times [2021-12-16 00:40:15,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:15,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991185043] [2021-12-16 00:40:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:15,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 00:40:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:40:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 00:40:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:40:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 00:40:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 00:40:15,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991185043] [2021-12-16 00:40:15,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991185043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:15,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:40:15,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 00:40:15,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723306548] [2021-12-16 00:40:15,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:15,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:40:15,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:40:15,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:40:15,694 INFO L87 Difference]: Start difference. First operand 638 states and 1014 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:21,930 INFO L93 Difference]: Finished difference Result 1510 states and 2461 transitions. [2021-12-16 00:40:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:40:21,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 153 [2021-12-16 00:40:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:21,937 INFO L225 Difference]: With dead ends: 1510 [2021-12-16 00:40:21,938 INFO L226 Difference]: Without dead ends: 889 [2021-12-16 00:40:21,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:40:21,954 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 942 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 2657 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 2402 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:21,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 2402 Invalid, 2927 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [270 Valid, 2657 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-16 00:40:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-12-16 00:40:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 598. [2021-12-16 00:40:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 473 states have (on average 1.5983086680761098) internal successors, (756), 492 states have internal predecessors, (756), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-16 00:40:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 947 transitions. [2021-12-16 00:40:22,055 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 947 transitions. Word has length 153 [2021-12-16 00:40:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:22,055 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 947 transitions. [2021-12-16 00:40:22,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 947 transitions. [2021-12-16 00:40:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-16 00:40:22,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:22,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:22,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 00:40:22,061 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1862521589, now seen corresponding path program 1 times [2021-12-16 00:40:22,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:22,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024201462] [2021-12-16 00:40:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:22,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 00:40:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:40:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 00:40:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:40:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 00:40:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:40:22,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:22,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024201462] [2021-12-16 00:40:22,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024201462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:22,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:40:22,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-16 00:40:22,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99391399] [2021-12-16 00:40:22,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:22,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 00:40:22,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 00:40:22,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:22,706 INFO L87 Difference]: Start difference. First operand 598 states and 947 transitions. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 8 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:31,059 INFO L93 Difference]: Finished difference Result 1438 states and 2355 transitions. [2021-12-16 00:40:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 00:40:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 8 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-12-16 00:40:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:31,076 INFO L225 Difference]: With dead ends: 1438 [2021-12-16 00:40:31,078 INFO L226 Difference]: Without dead ends: 941 [2021-12-16 00:40:31,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-12-16 00:40:31,095 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 1939 mSDsluCounter, 4666 mSDsCounter, 0 mSdLazyCounter, 7451 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2014 SdHoareTripleChecker+Valid, 5652 SdHoareTripleChecker+Invalid, 8087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 7451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:31,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2014 Valid, 5652 Invalid, 8087 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [636 Valid, 7451 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-16 00:40:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-12-16 00:40:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 605. [2021-12-16 00:40:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 478 states have (on average 1.5899581589958158) internal successors, (760), 497 states have internal predecessors, (760), 98 states have call successors, (98), 27 states have call predecessors, (98), 28 states have return successors, (98), 93 states have call predecessors, (98), 93 states have call successors, (98) [2021-12-16 00:40:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 956 transitions. [2021-12-16 00:40:31,181 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 956 transitions. Word has length 154 [2021-12-16 00:40:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:31,181 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 956 transitions. [2021-12-16 00:40:31,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 8 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 956 transitions. [2021-12-16 00:40:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-16 00:40:31,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:31,185 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 00:40:31,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 00:40:31,187 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1612104420, now seen corresponding path program 1 times [2021-12-16 00:40:31,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:31,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614729720] [2021-12-16 00:40:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:31,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 00:40:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 00:40:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 00:40:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 00:40:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 00:40:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:40:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:40:31,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:31,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614729720] [2021-12-16 00:40:31,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614729720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:31,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:40:31,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 00:40:31,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144297362] [2021-12-16 00:40:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 00:40:31,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 00:40:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:40:31,749 INFO L87 Difference]: Start difference. First operand 605 states and 956 transitions. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 7 states have internal predecessors, (116), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:38,444 INFO L93 Difference]: Finished difference Result 1489 states and 2427 transitions. [2021-12-16 00:40:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 00:40:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 7 states have internal predecessors, (116), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2021-12-16 00:40:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:38,450 INFO L225 Difference]: With dead ends: 1489 [2021-12-16 00:40:38,450 INFO L226 Difference]: Without dead ends: 927 [2021-12-16 00:40:38,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-12-16 00:40:38,453 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 1924 mSDsluCounter, 4123 mSDsCounter, 0 mSdLazyCounter, 6332 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 5070 SdHoareTripleChecker+Invalid, 6943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 6332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:38,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 5070 Invalid, 6943 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [611 Valid, 6332 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-16 00:40:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-12-16 00:40:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 594. [2021-12-16 00:40:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 467 states have (on average 1.5995717344753748) internal successors, (747), 485 states have internal predecessors, (747), 98 states have call successors, (98), 27 states have call predecessors, (98), 28 states have return successors, (98), 94 states have call predecessors, (98), 93 states have call successors, (98) [2021-12-16 00:40:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 943 transitions. [2021-12-16 00:40:38,540 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 943 transitions. Word has length 156 [2021-12-16 00:40:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:38,541 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 943 transitions. [2021-12-16 00:40:38,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 7 states have internal predecessors, (116), 2 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 943 transitions. [2021-12-16 00:40:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-16 00:40:38,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:38,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:38,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-16 00:40:38,543 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:38,544 INFO L85 PathProgramCache]: Analyzing trace with hash 321878398, now seen corresponding path program 1 times [2021-12-16 00:40:38,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:38,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426494307] [2021-12-16 00:40:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:38,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 00:40:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 00:40:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 00:40:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 00:40:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:39,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 00:40:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:39,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:40:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:40:39,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426494307] [2021-12-16 00:40:39,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426494307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:39,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:40:39,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 00:40:39,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046883384] [2021-12-16 00:40:39,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:39,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 00:40:39,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 00:40:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:40:39,032 INFO L87 Difference]: Start difference. First operand 594 states and 943 transitions. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:44,664 INFO L93 Difference]: Finished difference Result 1496 states and 2430 transitions. [2021-12-16 00:40:44,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 00:40:44,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2021-12-16 00:40:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:44,672 INFO L225 Difference]: With dead ends: 1496 [2021-12-16 00:40:44,672 INFO L226 Difference]: Without dead ends: 939 [2021-12-16 00:40:44,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:40:44,675 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 1042 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 4428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:44,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 3380 Invalid, 4428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 4141 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-16 00:40:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-12-16 00:40:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 601. [2021-12-16 00:40:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 474 states have (on average 1.590717299578059) internal successors, (754), 492 states have internal predecessors, (754), 98 states have call successors, (98), 27 states have call predecessors, (98), 28 states have return successors, (98), 94 states have call predecessors, (98), 93 states have call successors, (98) [2021-12-16 00:40:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 950 transitions. [2021-12-16 00:40:44,794 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 950 transitions. Word has length 156 [2021-12-16 00:40:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:44,797 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 950 transitions. [2021-12-16 00:40:44,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 950 transitions. [2021-12-16 00:40:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 00:40:44,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:44,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:44,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-16 00:40:44,803 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash -728268342, now seen corresponding path program 1 times [2021-12-16 00:40:44,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:44,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441906221] [2021-12-16 00:40:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:44,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:44,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 00:40:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 00:40:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 00:40:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-16 00:40:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:40:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 00:40:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 00:40:45,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441906221] [2021-12-16 00:40:45,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441906221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291211419] [2021-12-16 00:40:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:45,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:45,301 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:45,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 00:40:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:45,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 00:40:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:40:45,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:45,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291211419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:45,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:45,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 13 [2021-12-16 00:40:45,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124458795] [2021-12-16 00:40:45,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:45,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 00:40:45,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 00:40:45,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:45,724 INFO L87 Difference]: Start difference. First operand 601 states and 950 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:45,873 INFO L93 Difference]: Finished difference Result 1547 states and 2541 transitions. [2021-12-16 00:40:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 00:40:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 160 [2021-12-16 00:40:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:45,880 INFO L225 Difference]: With dead ends: 1547 [2021-12-16 00:40:45,880 INFO L226 Difference]: Without dead ends: 1053 [2021-12-16 00:40:45,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:45,886 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 832 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:45,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 1773 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:40:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-12-16 00:40:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1038. [2021-12-16 00:40:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 812 states have (on average 1.5923645320197044) internal successors, (1293), 843 states have internal predecessors, (1293), 176 states have call successors, (176), 46 states have call predecessors, (176), 49 states have return successors, (200), 174 states have call predecessors, (200), 171 states have call successors, (200) [2021-12-16 00:40:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1669 transitions. [2021-12-16 00:40:45,965 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1669 transitions. Word has length 160 [2021-12-16 00:40:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:45,965 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1669 transitions. [2021-12-16 00:40:45,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 00:40:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1669 transitions. [2021-12-16 00:40:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 00:40:45,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:45,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:45,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:46,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-16 00:40:46,191 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1600933065, now seen corresponding path program 1 times [2021-12-16 00:40:46,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:46,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931124857] [2021-12-16 00:40:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:46,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 00:40:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:40:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 00:40:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 00:40:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 00:40:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 00:40:46,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:46,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931124857] [2021-12-16 00:40:46,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931124857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:46,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:40:46,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 00:40:46,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201670610] [2021-12-16 00:40:46,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:46,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 00:40:46,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:46,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 00:40:46,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:40:46,584 INFO L87 Difference]: Start difference. First operand 1038 states and 1669 transitions. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-16 00:40:55,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:55,635 INFO L93 Difference]: Finished difference Result 3746 states and 6355 transitions. [2021-12-16 00:40:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 00:40:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 161 [2021-12-16 00:40:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:55,658 INFO L225 Difference]: With dead ends: 3746 [2021-12-16 00:40:55,658 INFO L226 Difference]: Without dead ends: 2815 [2021-12-16 00:40:55,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 00:40:55,662 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 4221 mSDsluCounter, 3428 mSDsCounter, 0 mSdLazyCounter, 6921 mSolverCounterSat, 1560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4299 SdHoareTripleChecker+Valid, 4415 SdHoareTripleChecker+Invalid, 8481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1560 IncrementalHoareTripleChecker+Valid, 6921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:55,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4299 Valid, 4415 Invalid, 8481 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1560 Valid, 6921 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-12-16 00:40:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-12-16 00:40:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2024. [2021-12-16 00:40:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 1581 states have (on average 1.6110056925996206) internal successors, (2547), 1632 states have internal predecessors, (2547), 349 states have call successors, (349), 82 states have call predecessors, (349), 93 states have return successors, (402), 357 states have call predecessors, (402), 344 states have call successors, (402) [2021-12-16 00:40:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 3298 transitions. [2021-12-16 00:40:55,871 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 3298 transitions. Word has length 161 [2021-12-16 00:40:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:55,871 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 3298 transitions. [2021-12-16 00:40:55,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-16 00:40:55,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 3298 transitions. [2021-12-16 00:40:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-16 00:40:55,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:55,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:55,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-16 00:40:55,875 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash -748958677, now seen corresponding path program 1 times [2021-12-16 00:40:55,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:55,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881236303] [2021-12-16 00:40:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:55,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 00:40:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:40:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:40:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 00:40:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:40:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 00:40:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:40:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 00:40:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 00:40:56,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:56,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881236303] [2021-12-16 00:40:56,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881236303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:56,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479647277] [2021-12-16 00:40:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:56,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:56,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:56,330 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:56,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process