./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec1_product25.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_product25.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 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 14:31:34,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 14:31:34,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 14:31:34,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 14:31:34,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 14:31:34,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 14:31:34,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 14:31:34,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 14:31:34,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 14:31:34,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 14:31:34,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 14:31:34,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 14:31:34,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 14:31:34,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 14:31:34,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 14:31:34,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 14:31:34,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 14:31:34,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 14:31:34,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 14:31:34,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 14:31:34,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 14:31:34,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 14:31:34,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 14:31:34,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 14:31:34,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 14:31:34,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 14:31:34,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 14:31:34,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 14:31:34,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 14:31:34,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 14:31:34,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 14:31:34,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 14:31:34,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 14:31:34,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 14:31:34,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 14:31:34,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 14:31:34,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 14:31:34,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 14:31:34,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 14:31:34,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 14:31:34,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 14:31:34,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 14:31:34,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 14:31:34,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 14:31:34,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 14:31:34,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 14:31:34,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 14:31:34,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 14:31:34,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 14:31:34,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 14:31:34,713 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 14:31:34,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 14:31:34,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 14:31:34,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 14:31:34,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 14:31:34,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 14:31:34,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 14:31:34,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 14:31:34,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 14:31:34,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 14:31:34,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 14:31:34,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 14:31:34,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 14:31:34,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 14:31:34,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 14:31:34,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 14:31:34,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:31:34,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 14:31:34,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 14:31:34,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 14:31:34,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 14:31:34,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 14:31:34,718 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 14:31:34,718 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 14:31:34,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 14:31:34,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 14:31:34,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 [2021-12-17 14:31:34,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 14:31:34,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 14:31:34,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 14:31:34,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 14:31:34,927 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 14:31:34,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-12-17 14:31:34,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34c56a365/7b48cd1f793f4933905bc8d408b85383/FLAG4eb9f7e9e [2021-12-17 14:31:35,484 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 14:31:35,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-12-17 14:31:35,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34c56a365/7b48cd1f793f4933905bc8d408b85383/FLAG4eb9f7e9e [2021-12-17 14:31:35,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34c56a365/7b48cd1f793f4933905bc8d408b85383 [2021-12-17 14:31:35,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 14:31:35,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 14:31:35,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 14:31:35,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 14:31:35,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 14:31:35,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:31:35" (1/1) ... [2021-12-17 14:31:35,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6a901f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:35, skipping insertion in model container [2021-12-17 14:31:35,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:31:35" (1/1) ... [2021-12-17 14:31:35,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 14:31:35,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 14:31:36,101 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_product25.cil.c[13407,13420] [2021-12-17 14:31:36,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:31:36,253 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 14:31:36,299 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_product25.cil.c[13407,13420] [2021-12-17 14:31:36,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:31:36,408 INFO L208 MainTranslator]: Completed translation [2021-12-17 14:31:36,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36 WrapperNode [2021-12-17 14:31:36,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 14:31:36,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 14:31:36,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 14:31:36,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 14:31:36,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,498 INFO L137 Inliner]: procedures = 91, calls = 335, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 835 [2021-12-17 14:31:36,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 14:31:36,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 14:31:36,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 14:31:36,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 14:31:36,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 14:31:36,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 14:31:36,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 14:31:36,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 14:31:36,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (1/1) ... [2021-12-17 14:31:36,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:31:36,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:36,628 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) [2021-12-17 14:31:36,644 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 [2021-12-17 14:31:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-17 14:31:36,669 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-17 14:31:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 14:31:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-17 14:31:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-17 14:31:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-12-17 14:31:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-12-17 14:31:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-17 14:31:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-17 14:31:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-17 14:31:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-17 14:31:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-17 14:31:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-17 14:31:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-17 14:31:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-17 14:31:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-17 14:31:36,672 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-17 14:31:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-12-17 14:31:36,672 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-12-17 14:31:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-17 14:31:36,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-17 14:31:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-17 14:31:36,673 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-17 14:31:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-17 14:31:36,673 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-17 14:31:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-17 14:31:36,673 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-17 14:31:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-17 14:31:36,673 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-17 14:31:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-17 14:31:36,674 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-17 14:31:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-17 14:31:36,674 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-17 14:31:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-17 14:31:36,674 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-17 14:31:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-17 14:31:36,675 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-17 14:31:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 14:31:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-17 14:31:36,675 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-17 14:31:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-17 14:31:36,675 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-17 14:31:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-17 14:31:36,676 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-17 14:31:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 14:31:36,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 14:31:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-17 14:31:36,676 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-17 14:31:36,845 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 14:31:36,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 14:31:37,711 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 14:31:37,725 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 14:31:37,726 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 14:31:37,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:31:37 BoogieIcfgContainer [2021-12-17 14:31:37,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 14:31:37,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 14:31:37,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 14:31:37,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 14:31:37,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:31:35" (1/3) ... [2021-12-17 14:31:37,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656c4d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:31:37, skipping insertion in model container [2021-12-17 14:31:37,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:31:36" (2/3) ... [2021-12-17 14:31:37,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656c4d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:31:37, skipping insertion in model container [2021-12-17 14:31:37,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:31:37" (3/3) ... [2021-12-17 14:31:37,736 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product25.cil.c [2021-12-17 14:31:37,744 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 14:31:37,744 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 14:31:37,825 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 14:31:37,833 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 [2021-12-17 14:31:37,834 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 14:31:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 548 states, 433 states have (on average 1.7066974595842956) internal successors, (739), 454 states have internal predecessors, (739), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2021-12-17 14:31:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 14:31:37,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:37,897 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] [2021-12-17 14:31:37,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:37,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1967759717, now seen corresponding path program 1 times [2021-12-17 14:31:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715467523] [2021-12-17 14:31:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:37,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:31:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 14:31:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:31:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 14:31:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:31:38,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:38,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715467523] [2021-12-17 14:31:38,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715467523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:38,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664902978] [2021-12-17 14:31:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:38,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:38,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:38,826 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) [2021-12-17 14:31:38,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 14:31:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:39,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 14:31:39,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 14:31:39,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:39,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664902978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:39,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:39,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-12-17 14:31:39,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399922182] [2021-12-17 14:31:39,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:39,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 14:31:39,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:39,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 14:31:39,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:31:39,432 INFO L87 Difference]: Start difference. First operand has 548 states, 433 states have (on average 1.7066974595842956) internal successors, (739), 454 states have internal predecessors, (739), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-17 14:31:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:39,498 INFO L93 Difference]: Finished difference Result 569 states and 951 transitions. [2021-12-17 14:31:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 14:31:39,500 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-12-17 14:31:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:39,519 INFO L225 Difference]: With dead ends: 569 [2021-12-17 14:31:39,519 INFO L226 Difference]: Without dead ends: 540 [2021-12-17 14:31:39,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:31:39,526 INFO L933 BasicCegarLoop]: 912 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, 912 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 [2021-12-17 14:31:39,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:31:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-17 14:31:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-12-17 14:31:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 427 states have (on average 1.7049180327868851) internal successors, (728), 446 states have internal predecessors, (728), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-17 14:31:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 905 transitions. [2021-12-17 14:31:39,605 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 905 transitions. Word has length 97 [2021-12-17 14:31:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:39,609 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 905 transitions. [2021-12-17 14:31:39,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-17 14:31:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 905 transitions. [2021-12-17 14:31:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 14:31:39,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:39,617 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] [2021-12-17 14:31:39,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:39,838 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 [2021-12-17 14:31:39,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1542777770, now seen corresponding path program 1 times [2021-12-17 14:31:39,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:39,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81197157] [2021-12-17 14:31:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:39,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:39,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:31:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 14:31:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:31:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 14:31:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:31:40,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:40,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81197157] [2021-12-17 14:31:40,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81197157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:40,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947122618] [2021-12-17 14:31:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:40,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:40,298 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) [2021-12-17 14:31:40,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 14:31:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:40,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:40,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:31:40,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:40,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947122618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:40,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:40,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:40,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498543958] [2021-12-17 14:31:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:40,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:40,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:40,836 INFO L87 Difference]: Start difference. First operand 540 states and 905 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:40,916 INFO L93 Difference]: Finished difference Result 1071 states and 1802 transitions. [2021-12-17 14:31:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:31:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-12-17 14:31:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:40,922 INFO L225 Difference]: With dead ends: 1071 [2021-12-17 14:31:40,922 INFO L226 Difference]: Without dead ends: 540 [2021-12-17 14:31:40,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:40,930 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 14 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2666 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 [2021-12-17 14:31:40,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2666 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:31:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-17 14:31:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-12-17 14:31:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 427 states have (on average 1.7025761124121779) internal successors, (727), 446 states have internal predecessors, (727), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-17 14:31:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 904 transitions. [2021-12-17 14:31:40,964 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 904 transitions. Word has length 99 [2021-12-17 14:31:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:40,965 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 904 transitions. [2021-12-17 14:31:40,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 904 transitions. [2021-12-17 14:31:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 14:31:40,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:40,977 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] [2021-12-17 14:31:41,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 14:31:41,191 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 [2021-12-17 14:31:41,192 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1481525902, now seen corresponding path program 1 times [2021-12-17 14:31:41,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:41,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629400300] [2021-12-17 14:31:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:41,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:31:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:31:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:31:41,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:41,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629400300] [2021-12-17 14:31:41,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629400300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:41,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374075917] [2021-12-17 14:31:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:41,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:41,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:41,665 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) [2021-12-17 14:31:41,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 14:31:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:41,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:41,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:31:42,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:42,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374075917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:42,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:42,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:42,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466704688] [2021-12-17 14:31:42,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:42,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:42,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:42,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:42,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:42,195 INFO L87 Difference]: Start difference. First operand 540 states and 904 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:42,264 INFO L93 Difference]: Finished difference Result 1071 states and 1800 transitions. [2021-12-17 14:31:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:31:42,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-17 14:31:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:42,275 INFO L225 Difference]: With dead ends: 1071 [2021-12-17 14:31:42,275 INFO L226 Difference]: Without dead ends: 540 [2021-12-17 14:31:42,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:42,280 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 12 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2666 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 [2021-12-17 14:31:42,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2666 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:31:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-17 14:31:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-12-17 14:31:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 427 states have (on average 1.7002341920374706) internal successors, (726), 446 states have internal predecessors, (726), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-17 14:31:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 903 transitions. [2021-12-17 14:31:42,315 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 903 transitions. Word has length 101 [2021-12-17 14:31:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:42,315 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 903 transitions. [2021-12-17 14:31:42,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 903 transitions. [2021-12-17 14:31:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 14:31:42,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:42,323 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] [2021-12-17 14:31:42,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:42,539 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 [2021-12-17 14:31:42,540 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:42,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1026290454, now seen corresponding path program 1 times [2021-12-17 14:31:42,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:42,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392907681] [2021-12-17 14:31:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:42,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 14:31:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 14:31:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:31:42,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:42,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392907681] [2021-12-17 14:31:42,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392907681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:42,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048233730] [2021-12-17 14:31:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:42,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:42,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:42,892 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) [2021-12-17 14:31:42,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 14:31:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:43,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:31:43,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:43,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048233730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:43,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:43,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:43,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280525194] [2021-12-17 14:31:43,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:43,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:43,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:43,394 INFO L87 Difference]: Start difference. First operand 540 states and 903 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:43,462 INFO L93 Difference]: Finished difference Result 1078 states and 1807 transitions. [2021-12-17 14:31:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:31:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-12-17 14:31:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:43,467 INFO L225 Difference]: With dead ends: 1078 [2021-12-17 14:31:43,467 INFO L226 Difference]: Without dead ends: 549 [2021-12-17 14:31:43,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:43,470 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 20 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2666 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 [2021-12-17 14:31:43,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2666 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:31:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-17 14:31:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-12-17 14:31:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 435 states have (on average 1.696551724137931) internal successors, (738), 454 states have internal predecessors, (738), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-17 14:31:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 915 transitions. [2021-12-17 14:31:43,489 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 915 transitions. Word has length 103 [2021-12-17 14:31:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:43,489 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 915 transitions. [2021-12-17 14:31:43,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 915 transitions. [2021-12-17 14:31:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 14:31:43,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:43,493 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] [2021-12-17 14:31:43,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 14:31:43,715 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 [2021-12-17 14:31:43,715 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:43,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1866135415, now seen corresponding path program 1 times [2021-12-17 14:31:43,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:43,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098372035] [2021-12-17 14:31:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:43,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:43,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:43,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:43,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 14:31:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:43,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:31:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:43,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:43,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 14:31:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:44,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:44,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:44,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:44,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:31:44,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:44,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098372035] [2021-12-17 14:31:44,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098372035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:44,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938607558] [2021-12-17 14:31:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:44,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:44,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:44,143 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) [2021-12-17 14:31:44,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 14:31:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:44,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:31:44,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:44,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938607558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:44,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:44,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:44,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457360736] [2021-12-17 14:31:44,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:44,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:44,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:44,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:44,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:44,605 INFO L87 Difference]: Start difference. First operand 549 states and 915 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:44,671 INFO L93 Difference]: Finished difference Result 1080 states and 1808 transitions. [2021-12-17 14:31:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:31:44,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-12-17 14:31:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:44,675 INFO L225 Difference]: With dead ends: 1080 [2021-12-17 14:31:44,675 INFO L226 Difference]: Without dead ends: 549 [2021-12-17 14:31:44,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:44,679 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 18 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2666 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 [2021-12-17 14:31:44,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2666 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:31:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-17 14:31:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-12-17 14:31:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 435 states have (on average 1.6942528735632183) internal successors, (737), 454 states have internal predecessors, (737), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-17 14:31:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 914 transitions. [2021-12-17 14:31:44,698 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 914 transitions. Word has length 104 [2021-12-17 14:31:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:44,699 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 914 transitions. [2021-12-17 14:31:44,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 914 transitions. [2021-12-17 14:31:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 14:31:44,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:44,702 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] [2021-12-17 14:31:44,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 14:31:44,915 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 [2021-12-17 14:31:44,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash 621974734, now seen corresponding path program 1 times [2021-12-17 14:31:44,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:44,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291140300] [2021-12-17 14:31:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:44,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 14:31:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:31:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:31:45,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:45,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291140300] [2021-12-17 14:31:45,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291140300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925431328] [2021-12-17 14:31:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:45,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:45,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:45,290 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) [2021-12-17 14:31:45,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 14:31:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:45,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:31:45,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:45,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925431328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:45,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:45,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:45,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240198030] [2021-12-17 14:31:45,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:45,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:45,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:45,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:45,757 INFO L87 Difference]: Start difference. First operand 549 states and 914 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:45,809 INFO L93 Difference]: Finished difference Result 1080 states and 1807 transitions. [2021-12-17 14:31:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:31:45,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-12-17 14:31:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:45,814 INFO L225 Difference]: With dead ends: 1080 [2021-12-17 14:31:45,814 INFO L226 Difference]: Without dead ends: 549 [2021-12-17 14:31:45,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:45,817 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 17 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2666 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 [2021-12-17 14:31:45,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2666 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:31:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-17 14:31:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-12-17 14:31:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 435 states have (on average 1.6919540229885057) internal successors, (736), 454 states have internal predecessors, (736), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-17 14:31:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 913 transitions. [2021-12-17 14:31:45,834 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 913 transitions. Word has length 105 [2021-12-17 14:31:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:45,834 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 913 transitions. [2021-12-17 14:31:45,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 913 transitions. [2021-12-17 14:31:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 14:31:45,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:45,837 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] [2021-12-17 14:31:45,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:46,053 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 [2021-12-17 14:31:46,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1097489107, now seen corresponding path program 1 times [2021-12-17 14:31:46,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:46,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578785831] [2021-12-17 14:31:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:46,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 14:31:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:31:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 14:31:46,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:46,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578785831] [2021-12-17 14:31:46,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578785831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:46,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188392366] [2021-12-17 14:31:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:46,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:46,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:46,473 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) [2021-12-17 14:31:46,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 14:31:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:46,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:31:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:31:46,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:46,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188392366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:46,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:46,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-17 14:31:46,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207205417] [2021-12-17 14:31:46,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:46,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:31:46,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:31:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:31:46,974 INFO L87 Difference]: Start difference. First operand 549 states and 913 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:47,065 INFO L93 Difference]: Finished difference Result 1099 states and 1837 transitions. [2021-12-17 14:31:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:31:47,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-12-17 14:31:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:47,070 INFO L225 Difference]: With dead ends: 1099 [2021-12-17 14:31:47,070 INFO L226 Difference]: Without dead ends: 572 [2021-12-17 14:31:47,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:31:47,073 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 148 mSDsluCounter, 4352 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5244 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:31:47,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5244 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-17 14:31:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2021-12-17 14:31:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 451 states have (on average 1.689578713968958) internal successors, (762), 472 states have internal predecessors, (762), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-12-17 14:31:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 944 transitions. [2021-12-17 14:31:47,091 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 944 transitions. Word has length 106 [2021-12-17 14:31:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:47,091 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 944 transitions. [2021-12-17 14:31:47,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 944 transitions. [2021-12-17 14:31:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 14:31:47,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:47,094 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] [2021-12-17 14:31:47,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:47,319 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 [2021-12-17 14:31:47,320 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1482855890, now seen corresponding path program 1 times [2021-12-17 14:31:47,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:47,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319346548] [2021-12-17 14:31:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:47,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 14:31:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:31:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 14:31:47,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:47,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319346548] [2021-12-17 14:31:47,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319346548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:47,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568138899] [2021-12-17 14:31:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:47,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:47,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:47,673 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) [2021-12-17 14:31:47,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 14:31:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:47,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:31:48,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:48,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568138899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:48,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:48,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:48,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468363389] [2021-12-17 14:31:48,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:48,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:48,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:48,084 INFO L87 Difference]: Start difference. First operand 568 states and 944 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:48,194 INFO L93 Difference]: Finished difference Result 1140 states and 1911 transitions. [2021-12-17 14:31:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:31:48,195 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-12-17 14:31:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:48,199 INFO L225 Difference]: With dead ends: 1140 [2021-12-17 14:31:48,199 INFO L226 Difference]: Without dead ends: 568 [2021-12-17 14:31:48,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:48,202 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 135 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2483 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 [2021-12-17 14:31:48,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2483 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-12-17 14:31:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-12-17 14:31:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 451 states have (on average 1.6784922394678492) internal successors, (757), 472 states have internal predecessors, (757), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-12-17 14:31:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 939 transitions. [2021-12-17 14:31:48,220 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 939 transitions. Word has length 106 [2021-12-17 14:31:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:48,220 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 939 transitions. [2021-12-17 14:31:48,220 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 939 transitions. [2021-12-17 14:31:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 14:31:48,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:48,223 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] [2021-12-17 14:31:48,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:48,447 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 [2021-12-17 14:31:48,448 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1328827690, now seen corresponding path program 1 times [2021-12-17 14:31:48,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:48,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786503322] [2021-12-17 14:31:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:48,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 14:31:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 14:31:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 14:31:48,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:48,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786503322] [2021-12-17 14:31:48,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786503322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:48,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53904750] [2021-12-17 14:31:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:48,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:48,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:48,832 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) [2021-12-17 14:31:48,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 14:31:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:49,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:31:49,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:49,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53904750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:49,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:49,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:49,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547947242] [2021-12-17 14:31:49,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:49,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:49,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:49,302 INFO L87 Difference]: Start difference. First operand 568 states and 939 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:49,406 INFO L93 Difference]: Finished difference Result 1140 states and 1901 transitions. [2021-12-17 14:31:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:31:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2021-12-17 14:31:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:49,411 INFO L225 Difference]: With dead ends: 1140 [2021-12-17 14:31:49,412 INFO L226 Difference]: Without dead ends: 568 [2021-12-17 14:31:49,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:49,416 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 129 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2483 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 [2021-12-17 14:31:49,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2483 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-12-17 14:31:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-12-17 14:31:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 451 states have (on average 1.6674057649667406) internal successors, (752), 472 states have internal predecessors, (752), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-12-17 14:31:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 934 transitions. [2021-12-17 14:31:49,433 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 934 transitions. Word has length 108 [2021-12-17 14:31:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:49,433 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 934 transitions. [2021-12-17 14:31:49,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 934 transitions. [2021-12-17 14:31:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 14:31:49,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:49,436 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] [2021-12-17 14:31:49,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-17 14:31:49,655 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 [2021-12-17 14:31:49,655 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash -595103666, now seen corresponding path program 1 times [2021-12-17 14:31:49,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:49,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431448263] [2021-12-17 14:31:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:49,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:31:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:31:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:49,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:50,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 14:31:50,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431448263] [2021-12-17 14:31:50,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431448263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798093936] [2021-12-17 14:31:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:50,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:50,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:50,012 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) [2021-12-17 14:31:50,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 14:31:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:31:50,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:50,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798093936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:50,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:50,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:50,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320509345] [2021-12-17 14:31:50,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:50,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:50,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:50,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:50,491 INFO L87 Difference]: Start difference. First operand 568 states and 934 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:50,633 INFO L93 Difference]: Finished difference Result 1176 states and 1949 transitions. [2021-12-17 14:31:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:31:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2021-12-17 14:31:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:50,641 INFO L225 Difference]: With dead ends: 1176 [2021-12-17 14:31:50,642 INFO L226 Difference]: Without dead ends: 634 [2021-12-17 14:31:50,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:50,644 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 179 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2493 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:31:50,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2493 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-17 14:31:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 619. [2021-12-17 14:31:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 501 states have (on average 1.6706586826347305) internal successors, (837), 522 states have internal predecessors, (837), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-12-17 14:31:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1018 transitions. [2021-12-17 14:31:50,669 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1018 transitions. Word has length 110 [2021-12-17 14:31:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:50,669 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1018 transitions. [2021-12-17 14:31:50,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1018 transitions. [2021-12-17 14:31:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 14:31:50,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:50,673 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] [2021-12-17 14:31:50,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:50,891 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 [2021-12-17 14:31:50,892 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash -947806956, now seen corresponding path program 1 times [2021-12-17 14:31:50,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:50,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516745374] [2021-12-17 14:31:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:50,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:31:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:31:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:31:51,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516745374] [2021-12-17 14:31:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516745374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089073240] [2021-12-17 14:31:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:51,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:51,230 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) [2021-12-17 14:31:51,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 14:31:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:51,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 14:31:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:31:51,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:51,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089073240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:51,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:51,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-17 14:31:51,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892152956] [2021-12-17 14:31:51,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:31:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:31:51,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:31:51,793 INFO L87 Difference]: Start difference. First operand 619 states and 1018 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:51,925 INFO L93 Difference]: Finished difference Result 1168 states and 1929 transitions. [2021-12-17 14:31:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:31:51,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-12-17 14:31:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:51,930 INFO L225 Difference]: With dead ends: 1168 [2021-12-17 14:31:51,930 INFO L226 Difference]: Without dead ends: 641 [2021-12-17 14:31:51,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:31:51,933 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 177 mSDsluCounter, 5130 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6002 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 [2021-12-17 14:31:51,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6002 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-17 14:31:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 619. [2021-12-17 14:31:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 501 states have (on average 1.6706586826347305) internal successors, (837), 522 states have internal predecessors, (837), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-12-17 14:31:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1018 transitions. [2021-12-17 14:31:51,957 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1018 transitions. Word has length 111 [2021-12-17 14:31:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:51,958 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1018 transitions. [2021-12-17 14:31:51,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1018 transitions. [2021-12-17 14:31:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 14:31:51,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:51,962 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] [2021-12-17 14:31:51,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:52,183 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 [2021-12-17 14:31:52,183 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash 854479412, now seen corresponding path program 1 times [2021-12-17 14:31:52,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:52,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741577792] [2021-12-17 14:31:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:52,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:31:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:31:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 14:31:52,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741577792] [2021-12-17 14:31:52,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741577792] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758000022] [2021-12-17 14:31:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:52,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:52,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:52,514 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) [2021-12-17 14:31:52,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 14:31:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:52,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:31:52,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:52,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758000022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:52,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:52,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:52,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725252241] [2021-12-17 14:31:52,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:52,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:52,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:52,970 INFO L87 Difference]: Start difference. First operand 619 states and 1018 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:53,131 INFO L93 Difference]: Finished difference Result 1176 states and 1947 transitions. [2021-12-17 14:31:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:31:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-12-17 14:31:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:53,135 INFO L225 Difference]: With dead ends: 1176 [2021-12-17 14:31:53,135 INFO L226 Difference]: Without dead ends: 619 [2021-12-17 14:31:53,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:53,138 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 173 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2493 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 [2021-12-17 14:31:53,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2493 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-12-17 14:31:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2021-12-17 14:31:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 501 states have (on average 1.6606786427145708) internal successors, (832), 522 states have internal predecessors, (832), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-12-17 14:31:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1013 transitions. [2021-12-17 14:31:53,154 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1013 transitions. Word has length 111 [2021-12-17 14:31:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:53,154 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1013 transitions. [2021-12-17 14:31:53,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1013 transitions. [2021-12-17 14:31:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 14:31:53,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:53,157 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] [2021-12-17 14:31:53,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:53,384 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 [2021-12-17 14:31:53,384 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1757294413, now seen corresponding path program 1 times [2021-12-17 14:31:53,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:53,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044985107] [2021-12-17 14:31:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:53,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:31:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:31:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:31:53,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044985107] [2021-12-17 14:31:53,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044985107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486413805] [2021-12-17 14:31:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:53,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:53,752 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) [2021-12-17 14:31:53,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 14:31:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:31:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:31:54,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:54,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486413805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:54,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:54,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-17 14:31:54,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086831580] [2021-12-17 14:31:54,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:54,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:31:54,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:54,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:31:54,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:31:54,203 INFO L87 Difference]: Start difference. First operand 619 states and 1013 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:54,284 INFO L93 Difference]: Finished difference Result 1103 states and 1821 transitions. [2021-12-17 14:31:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:31:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-12-17 14:31:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:54,289 INFO L225 Difference]: With dead ends: 1103 [2021-12-17 14:31:54,289 INFO L226 Difference]: Without dead ends: 643 [2021-12-17 14:31:54,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:31:54,292 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 134 mSDsluCounter, 4319 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5203 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 [2021-12-17 14:31:54,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 5203 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-12-17 14:31:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 638. [2021-12-17 14:31:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 517 states have (on average 1.6595744680851063) internal successors, (858), 540 states have internal predecessors, (858), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-17 14:31:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1043 transitions. [2021-12-17 14:31:54,310 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1043 transitions. Word has length 111 [2021-12-17 14:31:54,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:54,310 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1043 transitions. [2021-12-17 14:31:54,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1043 transitions. [2021-12-17 14:31:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 14:31:54,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:54,313 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] [2021-12-17 14:31:54,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:54,527 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 [2021-12-17 14:31:54,527 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1515032222, now seen corresponding path program 1 times [2021-12-17 14:31:54,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:54,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477731961] [2021-12-17 14:31:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:54,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:31:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:31:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:31:54,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:54,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477731961] [2021-12-17 14:31:54,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477731961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:54,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073598100] [2021-12-17 14:31:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:54,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:54,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:54,863 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) [2021-12-17 14:31:54,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 14:31:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:31:55,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:31:55,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:55,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073598100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:55,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:55,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-17 14:31:55,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724769597] [2021-12-17 14:31:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:55,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:31:55,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:31:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:31:55,351 INFO L87 Difference]: Start difference. First operand 638 states and 1043 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:55,440 INFO L93 Difference]: Finished difference Result 1133 states and 1872 transitions. [2021-12-17 14:31:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:31:55,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-12-17 14:31:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:55,444 INFO L225 Difference]: With dead ends: 1133 [2021-12-17 14:31:55,444 INFO L226 Difference]: Without dead ends: 673 [2021-12-17 14:31:55,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:31:55,447 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 143 mSDsluCounter, 4309 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5193 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:31:55,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5193 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:55,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-12-17 14:31:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 638. [2021-12-17 14:31:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 517 states have (on average 1.6595744680851063) internal successors, (858), 540 states have internal predecessors, (858), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-17 14:31:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1043 transitions. [2021-12-17 14:31:55,466 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1043 transitions. Word has length 112 [2021-12-17 14:31:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:55,466 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1043 transitions. [2021-12-17 14:31:55,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1043 transitions. [2021-12-17 14:31:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 14:31:55,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:55,469 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] [2021-12-17 14:31:55,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:55,683 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 [2021-12-17 14:31:55,683 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:55,684 INFO L85 PathProgramCache]: Analyzing trace with hash -176828958, now seen corresponding path program 1 times [2021-12-17 14:31:55,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:55,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429350005] [2021-12-17 14:31:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:55,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:31:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:31:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:31:56,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429350005] [2021-12-17 14:31:56,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429350005] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840190686] [2021-12-17 14:31:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:56,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:56,003 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) [2021-12-17 14:31:56,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 14:31:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:56,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 14:31:56,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:31:56,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:56,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840190686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:56,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:56,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-17 14:31:56,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514151037] [2021-12-17 14:31:56,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:56,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:31:56,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:31:56,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:31:56,444 INFO L87 Difference]: Start difference. First operand 638 states and 1043 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:56,560 INFO L93 Difference]: Finished difference Result 1118 states and 1846 transitions. [2021-12-17 14:31:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:31:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-12-17 14:31:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:56,564 INFO L225 Difference]: With dead ends: 1118 [2021-12-17 14:31:56,565 INFO L226 Difference]: Without dead ends: 658 [2021-12-17 14:31:56,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:31:56,569 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 177 mSDsluCounter, 5136 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6010 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:31:56,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6010 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-17 14:31:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 638. [2021-12-17 14:31:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 517 states have (on average 1.6595744680851063) internal successors, (858), 540 states have internal predecessors, (858), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-17 14:31:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1043 transitions. [2021-12-17 14:31:56,588 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1043 transitions. Word has length 112 [2021-12-17 14:31:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:56,588 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1043 transitions. [2021-12-17 14:31:56,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1043 transitions. [2021-12-17 14:31:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 14:31:56,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:56,591 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] [2021-12-17 14:31:56,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:56,816 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 [2021-12-17 14:31:56,816 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash 399084010, now seen corresponding path program 1 times [2021-12-17 14:31:56,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:56,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92857620] [2021-12-17 14:31:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:56,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:56,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:56,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:56,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:56,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:31:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:56,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:56,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 14:31:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:31:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:57,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:57,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:57,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 14:31:57,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92857620] [2021-12-17 14:31:57,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92857620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488824725] [2021-12-17 14:31:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:57,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:57,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:57,144 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) [2021-12-17 14:31:57,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 14:31:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:31:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 14:31:57,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:57,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488824725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:57,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:57,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:57,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180580784] [2021-12-17 14:31:57,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:57,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:57,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:57,582 INFO L87 Difference]: Start difference. First operand 638 states and 1043 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:57,629 INFO L93 Difference]: Finished difference Result 1170 states and 1931 transitions. [2021-12-17 14:31:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:31:57,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-12-17 14:31:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:57,633 INFO L225 Difference]: With dead ends: 1170 [2021-12-17 14:31:57,633 INFO L226 Difference]: Without dead ends: 638 [2021-12-17 14:31:57,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:57,635 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 23 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2635 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 [2021-12-17 14:31:57,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2635 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:31:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-17 14:31:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2021-12-17 14:31:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 517 states have (on average 1.6518375241779497) internal successors, (854), 540 states have internal predecessors, (854), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-17 14:31:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1039 transitions. [2021-12-17 14:31:57,651 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1039 transitions. Word has length 112 [2021-12-17 14:31:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:57,651 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1039 transitions. [2021-12-17 14:31:57,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1039 transitions. [2021-12-17 14:31:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 14:31:57,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:57,654 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] [2021-12-17 14:31:57,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:57,879 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 [2021-12-17 14:31:57,879 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -42579029, now seen corresponding path program 1 times [2021-12-17 14:31:57,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:57,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929169949] [2021-12-17 14:31:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:57,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:31:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 14:31:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:31:58,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929169949] [2021-12-17 14:31:58,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929169949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909669123] [2021-12-17 14:31:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:58,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:58,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:58,231 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) [2021-12-17 14:31:58,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 14:31:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 14:31:58,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:31:58,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:58,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909669123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:58,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:58,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-17 14:31:58,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323391922] [2021-12-17 14:31:58,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:31:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:31:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:31:58,671 INFO L87 Difference]: Start difference. First operand 638 states and 1039 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:58,800 INFO L93 Difference]: Finished difference Result 1118 states and 1843 transitions. [2021-12-17 14:31:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:31:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2021-12-17 14:31:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:58,804 INFO L225 Difference]: With dead ends: 1118 [2021-12-17 14:31:58,805 INFO L226 Difference]: Without dead ends: 658 [2021-12-17 14:31:58,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:31:58,807 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 185 mSDsluCounter, 5098 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 5966 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 [2021-12-17 14:31:58,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 5966 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:31:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-17 14:31:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 638. [2021-12-17 14:31:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 517 states have (on average 1.6518375241779497) internal successors, (854), 540 states have internal predecessors, (854), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-17 14:31:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1039 transitions. [2021-12-17 14:31:58,827 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1039 transitions. Word has length 113 [2021-12-17 14:31:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:58,828 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1039 transitions. [2021-12-17 14:31:58,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:31:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1039 transitions. [2021-12-17 14:31:58,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 14:31:58,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:58,831 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] [2021-12-17 14:31:58,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 14:31:59,053 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 [2021-12-17 14:31:59,053 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:31:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:31:59,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1003802297, now seen corresponding path program 1 times [2021-12-17 14:31:59,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:31:59,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652187583] [2021-12-17 14:31:59,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:59,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:31:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:31:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:31:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:31:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:31:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:31:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:31:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:31:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:31:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:31:59,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:31:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652187583] [2021-12-17 14:31:59,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652187583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:31:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848857499] [2021-12-17 14:31:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:31:59,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:31:59,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:31:59,358 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) [2021-12-17 14:31:59,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 14:31:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:31:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:31:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:31:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:31:59,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:31:59,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848857499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:31:59,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:31:59,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:31:59,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730722238] [2021-12-17 14:31:59,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:31:59,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:31:59,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:31:59,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:31:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:31:59,771 INFO L87 Difference]: Start difference. First operand 638 states and 1039 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:59,813 INFO L93 Difference]: Finished difference Result 1226 states and 2013 transitions. [2021-12-17 14:31:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:31:59,815 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-17 14:31:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:59,818 INFO L225 Difference]: With dead ends: 1226 [2021-12-17 14:31:59,819 INFO L226 Difference]: Without dead ends: 674 [2021-12-17 14:31:59,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:31:59,821 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 38 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2611 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 [2021-12-17 14:31:59,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2611 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:31:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-17 14:31:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 662. [2021-12-17 14:31:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 541 states have (on average 1.6303142329020333) internal successors, (882), 564 states have internal predecessors, (882), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-17 14:31:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1067 transitions. [2021-12-17 14:31:59,840 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1067 transitions. Word has length 114 [2021-12-17 14:31:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:31:59,840 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1067 transitions. [2021-12-17 14:31:59,841 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:31:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1067 transitions. [2021-12-17 14:31:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 14:31:59,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:31:59,844 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] [2021-12-17 14:31:59,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:00,063 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 [2021-12-17 14:32:00,063 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:00,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1792760933, now seen corresponding path program 1 times [2021-12-17 14:32:00,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:00,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503308728] [2021-12-17 14:32:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:00,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:32:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:32:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:32:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:32:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:32:00,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503308728] [2021-12-17 14:32:00,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503308728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184220403] [2021-12-17 14:32:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:00,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:00,403 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) [2021-12-17 14:32:00,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 14:32:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:00,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 14:32:00,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:32:00,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:00,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184220403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:00,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:00,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:32:00,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132701173] [2021-12-17 14:32:00,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:00,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:32:00,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:32:00,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:32:00,794 INFO L87 Difference]: Start difference. First operand 662 states and 1067 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:32:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:00,940 INFO L93 Difference]: Finished difference Result 1236 states and 2042 transitions. [2021-12-17 14:32:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:32:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-17 14:32:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:00,944 INFO L225 Difference]: With dead ends: 1236 [2021-12-17 14:32:00,944 INFO L226 Difference]: Without dead ends: 781 [2021-12-17 14:32:00,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:00,947 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 215 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2776 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:00,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2776 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:32:00,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-12-17 14:32:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 664. [2021-12-17 14:32:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 543 states have (on average 1.6279926335174955) internal successors, (884), 566 states have internal predecessors, (884), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-17 14:32:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1069 transitions. [2021-12-17 14:32:00,969 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1069 transitions. Word has length 114 [2021-12-17 14:32:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:00,969 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1069 transitions. [2021-12-17 14:32:00,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:32:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1069 transitions. [2021-12-17 14:32:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 14:32:00,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:00,972 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] [2021-12-17 14:32:00,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-17 14:32:01,195 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 [2021-12-17 14:32:01,195 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2126746652, now seen corresponding path program 1 times [2021-12-17 14:32:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225605084] [2021-12-17 14:32:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:01,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:32:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:32:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:32:01,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:01,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225605084] [2021-12-17 14:32:01,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225605084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:01,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918122771] [2021-12-17 14:32:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:01,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:01,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:01,544 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) [2021-12-17 14:32:01,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 14:32:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:01,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 14:32:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 14:32:02,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:02,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918122771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:02,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:02,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-12-17 14:32:02,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962641470] [2021-12-17 14:32:02,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:02,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:32:02,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:32:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:32:02,104 INFO L87 Difference]: Start difference. First operand 664 states and 1069 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-17 14:32:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:05,306 INFO L93 Difference]: Finished difference Result 1964 states and 3283 transitions. [2021-12-17 14:32:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:32:05,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 117 [2021-12-17 14:32:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:05,314 INFO L225 Difference]: With dead ends: 1964 [2021-12-17 14:32:05,314 INFO L226 Difference]: Without dead ends: 1507 [2021-12-17 14:32:05,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-17 14:32:05,317 INFO L933 BasicCegarLoop]: 1688 mSDtfsCounter, 4064 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 5018 mSolverCounterSat, 1138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4183 SdHoareTripleChecker+Valid, 4797 SdHoareTripleChecker+Invalid, 6156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1138 IncrementalHoareTripleChecker+Valid, 5018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:05,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4183 Valid, 4797 Invalid, 6156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1138 Valid, 5018 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 14:32:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-12-17 14:32:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1342. [2021-12-17 14:32:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1066 states have (on average 1.6313320825515947) internal successors, (1739), 1113 states have internal predecessors, (1739), 218 states have call successors, (218), 44 states have call predecessors, (218), 57 states have return successors, (251), 215 states have call predecessors, (251), 213 states have call successors, (251) [2021-12-17 14:32:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2208 transitions. [2021-12-17 14:32:05,361 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2208 transitions. Word has length 117 [2021-12-17 14:32:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:05,362 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 2208 transitions. [2021-12-17 14:32:05,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-17 14:32:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2208 transitions. [2021-12-17 14:32:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-17 14:32:05,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:05,367 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] [2021-12-17 14:32:05,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:05,582 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 [2021-12-17 14:32:05,583 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash -774773161, now seen corresponding path program 1 times [2021-12-17 14:32:05,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:05,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497236089] [2021-12-17 14:32:05,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:05,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:32:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:32:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:32:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 14:32:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:32:05,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497236089] [2021-12-17 14:32:05,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497236089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337605086] [2021-12-17 14:32:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:05,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:05,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:05,887 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) [2021-12-17 14:32:05,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 14:32:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:06,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 14:32:06,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:32:06,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:06,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337605086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:06,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:06,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-17 14:32:06,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402317977] [2021-12-17 14:32:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:06,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:32:06,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:32:06,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:06,310 INFO L87 Difference]: Start difference. First operand 1342 states and 2208 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:32:06,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:06,643 INFO L93 Difference]: Finished difference Result 3341 states and 5636 transitions. [2021-12-17 14:32:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:32:06,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 118 [2021-12-17 14:32:06,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:06,657 INFO L225 Difference]: With dead ends: 3341 [2021-12-17 14:32:06,657 INFO L226 Difference]: Without dead ends: 2318 [2021-12-17 14:32:06,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:32:06,663 INFO L933 BasicCegarLoop]: 1387 mSDtfsCounter, 737 mSDsluCounter, 3477 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 4864 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:06,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 4864 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 14:32:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-12-17 14:32:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2299. [2021-12-17 14:32:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 1799 states have (on average 1.6397998888271261) internal successors, (2950), 1880 states have internal predecessors, (2950), 401 states have call successors, (401), 80 states have call predecessors, (401), 98 states have return successors, (472), 400 states have call predecessors, (472), 396 states have call successors, (472) [2021-12-17 14:32:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3823 transitions. [2021-12-17 14:32:06,748 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3823 transitions. Word has length 118 [2021-12-17 14:32:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:06,748 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 3823 transitions. [2021-12-17 14:32:06,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:32:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3823 transitions. [2021-12-17 14:32:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 14:32:06,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:06,758 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] [2021-12-17 14:32:06,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:06,980 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 [2021-12-17 14:32:06,980 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:06,981 INFO L85 PathProgramCache]: Analyzing trace with hash 112789604, now seen corresponding path program 1 times [2021-12-17 14:32:06,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:06,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432048455] [2021-12-17 14:32:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:06,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:32:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 14:32:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 14:32:07,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:07,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432048455] [2021-12-17 14:32:07,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432048455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:07,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249814563] [2021-12-17 14:32:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:07,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:07,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:07,302 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) [2021-12-17 14:32:07,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 14:32:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:32:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:32:07,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:07,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249814563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:07,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:07,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:32:07,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066162046] [2021-12-17 14:32:07,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:07,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:32:07,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:32:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:32:07,749 INFO L87 Difference]: Start difference. First operand 2299 states and 3823 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:32:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:07,845 INFO L93 Difference]: Finished difference Result 4454 states and 7448 transitions. [2021-12-17 14:32:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:32:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 120 [2021-12-17 14:32:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:07,858 INFO L225 Difference]: With dead ends: 4454 [2021-12-17 14:32:07,859 INFO L226 Difference]: Without dead ends: 2353 [2021-12-17 14:32:07,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:07,870 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 39 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:07,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2608 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:32:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-12-17 14:32:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2320. [2021-12-17 14:32:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 1819 states have (on average 1.639362286970863) internal successors, (2982), 1901 states have internal predecessors, (2982), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-17 14:32:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3856 transitions. [2021-12-17 14:32:07,941 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3856 transitions. Word has length 120 [2021-12-17 14:32:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:07,942 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 3856 transitions. [2021-12-17 14:32:07,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:32:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3856 transitions. [2021-12-17 14:32:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 14:32:07,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:07,951 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] [2021-12-17 14:32:07,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:08,167 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 [2021-12-17 14:32:08,167 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:08,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1145465082, now seen corresponding path program 1 times [2021-12-17 14:32:08,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:08,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115220734] [2021-12-17 14:32:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:08,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:32:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:32:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 14:32:08,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:08,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115220734] [2021-12-17 14:32:08,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115220734] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:08,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70797729] [2021-12-17 14:32:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:08,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:08,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:08,484 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) [2021-12-17 14:32:08,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 14:32:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 14:32:08,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:32:08,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:08,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70797729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:08,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:08,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-17 14:32:08,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694053043] [2021-12-17 14:32:08,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:08,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:32:08,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:08,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:32:08,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:32:08,947 INFO L87 Difference]: Start difference. First operand 2320 states and 3856 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:32:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:09,101 INFO L93 Difference]: Finished difference Result 4384 states and 7328 transitions. [2021-12-17 14:32:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:32:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2021-12-17 14:32:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:09,115 INFO L225 Difference]: With dead ends: 4384 [2021-12-17 14:32:09,116 INFO L226 Difference]: Without dead ends: 2393 [2021-12-17 14:32:09,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:32:09,126 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 175 mSDsluCounter, 5108 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5976 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:09,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 5976 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:32:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-12-17 14:32:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2320. [2021-12-17 14:32:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 1819 states have (on average 1.638812534359538) internal successors, (2981), 1901 states have internal predecessors, (2981), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-17 14:32:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3855 transitions. [2021-12-17 14:32:09,193 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3855 transitions. Word has length 121 [2021-12-17 14:32:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:09,193 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 3855 transitions. [2021-12-17 14:32:09,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:32:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3855 transitions. [2021-12-17 14:32:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 14:32:09,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:09,204 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] [2021-12-17 14:32:09,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:09,427 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 [2021-12-17 14:32:09,428 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1015959048, now seen corresponding path program 1 times [2021-12-17 14:32:09,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:09,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730291658] [2021-12-17 14:32:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:09,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:32:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:32:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 14:32:09,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:09,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730291658] [2021-12-17 14:32:09,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730291658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:09,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940965487] [2021-12-17 14:32:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:09,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:09,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:09,747 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) [2021-12-17 14:32:09,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 14:32:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:09,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 14:32:09,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 14:32:10,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:10,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940965487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:10,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:10,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-17 14:32:10,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387393935] [2021-12-17 14:32:10,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:10,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:32:10,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:32:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:10,243 INFO L87 Difference]: Start difference. First operand 2320 states and 3855 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-17 14:32:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:10,516 INFO L93 Difference]: Finished difference Result 2533 states and 4209 transitions. [2021-12-17 14:32:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:32:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 121 [2021-12-17 14:32:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:10,541 INFO L225 Difference]: With dead ends: 2533 [2021-12-17 14:32:10,541 INFO L226 Difference]: Without dead ends: 2516 [2021-12-17 14:32:10,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:10,543 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 911 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:10,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 1596 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 14:32:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-12-17 14:32:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2338. [2021-12-17 14:32:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 1837 states have (on average 1.632553075666848) internal successors, (2999), 1919 states have internal predecessors, (2999), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-17 14:32:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3873 transitions. [2021-12-17 14:32:10,629 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3873 transitions. Word has length 121 [2021-12-17 14:32:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:10,630 INFO L470 AbstractCegarLoop]: Abstraction has 2338 states and 3873 transitions. [2021-12-17 14:32:10,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-17 14:32:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3873 transitions. [2021-12-17 14:32:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 14:32:10,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:10,638 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, 1] [2021-12-17 14:32:10,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:10,851 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 [2021-12-17 14:32:10,851 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash -830416413, now seen corresponding path program 1 times [2021-12-17 14:32:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:10,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903162341] [2021-12-17 14:32:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:10,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:10,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:10,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:10,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:10,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:32:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:10,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:10,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:11,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:32:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:11,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:11,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:11,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:11,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:11,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:32:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 14:32:11,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:11,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903162341] [2021-12-17 14:32:11,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903162341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:11,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810790639] [2021-12-17 14:32:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:11,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:11,176 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) [2021-12-17 14:32:11,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 14:32:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:32:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 14:32:11,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:11,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810790639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:11,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:11,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-17 14:32:11,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740263316] [2021-12-17 14:32:11,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:11,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:32:11,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:32:11,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:11,597 INFO L87 Difference]: Start difference. First operand 2338 states and 3873 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 14:32:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:11,646 INFO L93 Difference]: Finished difference Result 2367 states and 3911 transitions. [2021-12-17 14:32:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 14:32:11,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 127 [2021-12-17 14:32:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:11,660 INFO L225 Difference]: With dead ends: 2367 [2021-12-17 14:32:11,660 INFO L226 Difference]: Without dead ends: 2350 [2021-12-17 14:32:11,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:32:11,662 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 37 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3524 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 [2021-12-17 14:32:11,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3524 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:32:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-12-17 14:32:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2338. [2021-12-17 14:32:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 1837 states have (on average 1.6292868807838867) internal successors, (2993), 1919 states have internal predecessors, (2993), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-17 14:32:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3867 transitions. [2021-12-17 14:32:11,725 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3867 transitions. Word has length 127 [2021-12-17 14:32:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:11,726 INFO L470 AbstractCegarLoop]: Abstraction has 2338 states and 3867 transitions. [2021-12-17 14:32:11,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 14:32:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3867 transitions. [2021-12-17 14:32:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 14:32:11,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:11,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:32:11,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:11,959 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,SelfDestructingSolverStorable24 [2021-12-17 14:32:11,960 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1974262225, now seen corresponding path program 1 times [2021-12-17 14:32:11,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:11,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690045757] [2021-12-17 14:32:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:11,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:32:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:32:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:32:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:32:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:32:12,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690045757] [2021-12-17 14:32:12,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690045757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088086454] [2021-12-17 14:32:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:12,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:12,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:12,280 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) [2021-12-17 14:32:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 14:32:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:12,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 14:32:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:32:12,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:12,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088086454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:12,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:12,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-17 14:32:12,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453531952] [2021-12-17 14:32:12,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:12,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:32:12,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:32:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:32:12,754 INFO L87 Difference]: Start difference. First operand 2338 states and 3867 transitions. Second operand has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-12-17 14:32:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:12,884 INFO L93 Difference]: Finished difference Result 4534 states and 7530 transitions. [2021-12-17 14:32:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:32:12,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 138 [2021-12-17 14:32:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:12,909 INFO L225 Difference]: With dead ends: 4534 [2021-12-17 14:32:12,914 INFO L226 Difference]: Without dead ends: 2421 [2021-12-17 14:32:12,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:32:12,926 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 167 mSDsluCounter, 4266 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 5144 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:12,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 5144 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:32:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2021-12-17 14:32:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2338. [2021-12-17 14:32:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 1837 states have (on average 1.6292868807838867) internal successors, (2993), 1919 states have internal predecessors, (2993), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-17 14:32:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3867 transitions. [2021-12-17 14:32:13,001 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3867 transitions. Word has length 138 [2021-12-17 14:32:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 2338 states and 3867 transitions. [2021-12-17 14:32:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-12-17 14:32:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3867 transitions. [2021-12-17 14:32:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 14:32:13,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:13,012 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] [2021-12-17 14:32:13,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:13,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 14:32:13,227 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1016183460, now seen corresponding path program 1 times [2021-12-17 14:32:13,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322089835] [2021-12-17 14:32:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:13,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:32:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:32:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:32:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 14:32:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 14:32:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:32:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 14:32:13,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322089835] [2021-12-17 14:32:13,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322089835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226878158] [2021-12-17 14:32:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:13,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:13,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:13,579 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:32:13,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 14:32:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:32:13,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:32:14,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:14,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226878158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:14,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:14,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:32:14,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838614301] [2021-12-17 14:32:14,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:14,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:32:14,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:32:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:32:14,035 INFO L87 Difference]: Start difference. First operand 2338 states and 3867 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-12-17 14:32:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:14,120 INFO L93 Difference]: Finished difference Result 4538 states and 7536 transitions. [2021-12-17 14:32:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:32:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 138 [2021-12-17 14:32:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:14,132 INFO L225 Difference]: With dead ends: 4538 [2021-12-17 14:32:14,132 INFO L226 Difference]: Without dead ends: 2168 [2021-12-17 14:32:14,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:14,140 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 11 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2634 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 [2021-12-17 14:32:14,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2634 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:32:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-12-17 14:32:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2168. [2021-12-17 14:32:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 1682 states have (on average 1.6361474435196195) internal successors, (2752), 1758 states have internal predecessors, (2752), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2021-12-17 14:32:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 3607 transitions. [2021-12-17 14:32:14,238 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 3607 transitions. Word has length 138 [2021-12-17 14:32:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:14,238 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 3607 transitions. [2021-12-17 14:32:14,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-12-17 14:32:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 3607 transitions. [2021-12-17 14:32:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-17 14:32:14,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:14,250 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] [2021-12-17 14:32:14,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:14,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 14:32:14,474 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1032862260, now seen corresponding path program 1 times [2021-12-17 14:32:14,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:14,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481964033] [2021-12-17 14:32:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:14,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 14:32:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 14:32:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:32:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:32:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:32:14,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:14,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481964033] [2021-12-17 14:32:14,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481964033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:14,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813625458] [2021-12-17 14:32:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:14,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:14,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:14,808 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:32:14,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 14:32:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:32:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:32:15,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:15,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813625458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:15,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:15,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:32:15,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730414909] [2021-12-17 14:32:15,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:15,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:32:15,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:32:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:32:15,233 INFO L87 Difference]: Start difference. First operand 2168 states and 3607 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2021-12-17 14:32:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:15,333 INFO L93 Difference]: Finished difference Result 4305 states and 7180 transitions. [2021-12-17 14:32:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:32:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 140 [2021-12-17 14:32:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:15,347 INFO L225 Difference]: With dead ends: 4305 [2021-12-17 14:32:15,347 INFO L226 Difference]: Without dead ends: 2168 [2021-12-17 14:32:15,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:15,356 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 176 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2467 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 [2021-12-17 14:32:15,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2467 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:32:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-12-17 14:32:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2168. [2021-12-17 14:32:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 1682 states have (on average 1.635552913198573) internal successors, (2751), 1758 states have internal predecessors, (2751), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2021-12-17 14:32:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 3606 transitions. [2021-12-17 14:32:15,418 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 3606 transitions. Word has length 140 [2021-12-17 14:32:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:15,419 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 3606 transitions. [2021-12-17 14:32:15,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2021-12-17 14:32:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 3606 transitions. [2021-12-17 14:32:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 14:32:15,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:15,425 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] [2021-12-17 14:32:15,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-17 14:32:15,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 14:32:15,628 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:15,629 INFO L85 PathProgramCache]: Analyzing trace with hash -523435746, now seen corresponding path program 1 times [2021-12-17 14:32:15,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:15,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332545700] [2021-12-17 14:32:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:15,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:32:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:32:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:15,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:16,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:16,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:32:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:16,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:32:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:32:16,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:16,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332545700] [2021-12-17 14:32:16,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332545700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:16,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:32:16,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 14:32:16,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541359844] [2021-12-17 14:32:16,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:16,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 14:32:16,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 14:32:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:32:16,051 INFO L87 Difference]: Start difference. First operand 2168 states and 3606 transitions. Second operand has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-17 14:32:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:22,743 INFO L93 Difference]: Finished difference Result 5634 states and 9727 transitions. [2021-12-17 14:32:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 14:32:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2021-12-17 14:32:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:22,766 INFO L225 Difference]: With dead ends: 5634 [2021-12-17 14:32:22,767 INFO L226 Difference]: Without dead ends: 3512 [2021-12-17 14:32:22,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-12-17 14:32:22,776 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 1989 mSDsluCounter, 4559 mSDsCounter, 0 mSdLazyCounter, 7152 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2061 SdHoareTripleChecker+Valid, 5515 SdHoareTripleChecker+Invalid, 7754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 7152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:22,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2061 Valid, 5515 Invalid, 7754 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [602 Valid, 7152 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 14:32:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2021-12-17 14:32:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 2248. [2021-12-17 14:32:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 1746 states have (on average 1.629438717067583) internal successors, (2845), 1822 states have internal predecessors, (2845), 406 states have call successors, (406), 77 states have call predecessors, (406), 95 states have return successors, (486), 408 states have call predecessors, (486), 401 states have call successors, (486) [2021-12-17 14:32:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 3737 transitions. [2021-12-17 14:32:23,008 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 3737 transitions. Word has length 141 [2021-12-17 14:32:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:23,008 INFO L470 AbstractCegarLoop]: Abstraction has 2248 states and 3737 transitions. [2021-12-17 14:32:23,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-17 14:32:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 3737 transitions. [2021-12-17 14:32:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 14:32:23,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:23,016 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] [2021-12-17 14:32:23,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 14:32:23,017 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:23,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1271137707, now seen corresponding path program 1 times [2021-12-17 14:32:23,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:23,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292617066] [2021-12-17 14:32:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:23,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:32:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:32:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:32:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 14:32:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 14:32:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 14:32:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 14:32:23,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292617066] [2021-12-17 14:32:23,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292617066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:23,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:32:23,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:32:23,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564963830] [2021-12-17 14:32:23,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:23,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:32:23,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:23,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:32:23,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:32:23,319 INFO L87 Difference]: Start difference. First operand 2248 states and 3737 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:32:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:27,422 INFO L93 Difference]: Finished difference Result 3789 states and 6351 transitions. [2021-12-17 14:32:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:32:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 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 145 [2021-12-17 14:32:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:27,430 INFO L225 Difference]: With dead ends: 3789 [2021-12-17 14:32:27,430 INFO L226 Difference]: Without dead ends: 1555 [2021-12-17 14:32:27,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:32:27,436 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 1360 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:27,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 2309 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 14:32:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-12-17 14:32:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1039. [2021-12-17 14:32:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 827 states have (on average 1.6239419588875454) internal successors, (1343), 860 states have internal predecessors, (1343), 167 states have call successors, (167), 42 states have call predecessors, (167), 44 states have return successors, (179), 161 states have call predecessors, (179), 162 states have call successors, (179) [2021-12-17 14:32:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1689 transitions. [2021-12-17 14:32:27,534 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1689 transitions. Word has length 145 [2021-12-17 14:32:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:27,534 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1689 transitions. [2021-12-17 14:32:27,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:32:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1689 transitions. [2021-12-17 14:32:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 14:32:27,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:27,538 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] [2021-12-17 14:32:27,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 14:32:27,539 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash -829824043, now seen corresponding path program 1 times [2021-12-17 14:32:27,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:27,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099215235] [2021-12-17 14:32:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:27,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:32:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:32:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 14:32:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 14:32:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:32:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 14:32:27,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099215235] [2021-12-17 14:32:27,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099215235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:27,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519503639] [2021-12-17 14:32:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:27,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:27,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:27,892 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:32:27,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 14:32:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 14:32:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:32:28,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:28,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519503639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:28,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:28,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-12-17 14:32:28,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3602962] [2021-12-17 14:32:28,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:28,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:32:28,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:32:28,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:28,329 INFO L87 Difference]: Start difference. First operand 1039 states and 1689 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-17 14:32:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:28,535 INFO L93 Difference]: Finished difference Result 2751 states and 4559 transitions. [2021-12-17 14:32:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:32:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 146 [2021-12-17 14:32:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:28,540 INFO L225 Difference]: With dead ends: 2751 [2021-12-17 14:32:28,541 INFO L226 Difference]: Without dead ends: 1829 [2021-12-17 14:32:28,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:28,545 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 802 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:28,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 1707 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:32:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-12-17 14:32:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1814. [2021-12-17 14:32:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1429 states have (on average 1.6235129461161653) internal successors, (2320), 1487 states have internal predecessors, (2320), 306 states have call successors, (306), 76 states have call predecessors, (306), 78 states have return successors, (339), 299 states have call predecessors, (339), 301 states have call successors, (339) [2021-12-17 14:32:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2965 transitions. [2021-12-17 14:32:28,699 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2965 transitions. Word has length 146 [2021-12-17 14:32:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:28,700 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 2965 transitions. [2021-12-17 14:32:28,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-17 14:32:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2965 transitions. [2021-12-17 14:32:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 14:32:28,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:28,703 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] [2021-12-17 14:32:28,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:28,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:28,915 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:28,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1981015361, now seen corresponding path program 1 times [2021-12-17 14:32:28,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:28,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68534550] [2021-12-17 14:32:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:28,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:32:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:32:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:32:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 14:32:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 14:32:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:32:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 14:32:29,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:29,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68534550] [2021-12-17 14:32:29,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68534550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:29,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761839396] [2021-12-17 14:32:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:29,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:29,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:29,310 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:32:29,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 14:32:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 14:32:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:32:29,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:29,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761839396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:29,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:29,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 9 [2021-12-17 14:32:29,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334992937] [2021-12-17 14:32:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:29,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:32:29,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:32:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:32:29,872 INFO L87 Difference]: Start difference. First operand 1814 states and 2965 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 14:32:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:30,150 INFO L93 Difference]: Finished difference Result 5067 states and 8411 transitions. [2021-12-17 14:32:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:32:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2021-12-17 14:32:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:30,162 INFO L225 Difference]: With dead ends: 5067 [2021-12-17 14:32:30,162 INFO L226 Difference]: Without dead ends: 3383 [2021-12-17 14:32:30,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:32:30,168 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 863 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:30,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 1554 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:32:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-12-17 14:32:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 3365. [2021-12-17 14:32:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 2634 states have (on average 1.635155656795748) internal successors, (4307), 2746 states have internal predecessors, (4307), 584 states have call successors, (584), 144 states have call predecessors, (584), 146 states have return successors, (672), 572 states have call predecessors, (672), 579 states have call successors, (672) [2021-12-17 14:32:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 5563 transitions. [2021-12-17 14:32:30,487 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 5563 transitions. Word has length 151 [2021-12-17 14:32:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:30,488 INFO L470 AbstractCegarLoop]: Abstraction has 3365 states and 5563 transitions. [2021-12-17 14:32:30,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 14:32:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 5563 transitions. [2021-12-17 14:32:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-17 14:32:30,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:30,491 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] [2021-12-17 14:32:30,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 14:32:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-17 14:32:30,716 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 781961063, now seen corresponding path program 1 times [2021-12-17 14:32:30,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:30,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513845470] [2021-12-17 14:32:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:30,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:30,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:30,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:30,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:30,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:32:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:30,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:30,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:32:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:32:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 14:32:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:32:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 14:32:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 14:32:31,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:31,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513845470] [2021-12-17 14:32:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513845470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:31,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:32:31,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 14:32:31,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862085357] [2021-12-17 14:32:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:31,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 14:32:31,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 14:32:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:31,140 INFO L87 Difference]: Start difference. First operand 3365 states and 5563 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 14:32:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:36,463 INFO L93 Difference]: Finished difference Result 7315 states and 12646 transitions. [2021-12-17 14:32:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 14:32:36,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-12-17 14:32:36,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:36,486 INFO L225 Difference]: With dead ends: 7315 [2021-12-17 14:32:36,486 INFO L226 Difference]: Without dead ends: 4625 [2021-12-17 14:32:36,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:32:36,495 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 1333 mSDsluCounter, 2839 mSDsCounter, 0 mSdLazyCounter, 4945 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 5272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 4945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:36,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 3723 Invalid, 5272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 4945 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-17 14:32:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4625 states. [2021-12-17 14:32:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4625 to 3425. [2021-12-17 14:32:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 2682 states have (on average 1.628635346756152) internal successors, (4368), 2794 states have internal predecessors, (4368), 594 states have call successors, (594), 144 states have call predecessors, (594), 148 states have return successors, (686), 582 states have call predecessors, (686), 589 states have call successors, (686) [2021-12-17 14:32:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 5648 transitions. [2021-12-17 14:32:36,859 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 5648 transitions. Word has length 154 [2021-12-17 14:32:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:36,860 INFO L470 AbstractCegarLoop]: Abstraction has 3425 states and 5648 transitions. [2021-12-17 14:32:36,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 14:32:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 5648 transitions. [2021-12-17 14:32:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-17 14:32:36,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:36,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:32:36,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 14:32:36,864 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:36,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1483267705, now seen corresponding path program 1 times [2021-12-17 14:32:36,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:36,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046652387] [2021-12-17 14:32:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:36,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:36,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:36,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:36,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:36,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:32:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:32:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:32:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 14:32:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:32:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 14:32:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 14:32:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 14:32:37,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:37,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046652387] [2021-12-17 14:32:37,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046652387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:37,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:32:37,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 14:32:37,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569020462] [2021-12-17 14:32:37,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:37,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 14:32:37,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:37,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 14:32:37,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:32:37,256 INFO L87 Difference]: Start difference. First operand 3425 states and 5648 transitions. Second operand has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 14:32:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:48,283 INFO L93 Difference]: Finished difference Result 9078 states and 15989 transitions. [2021-12-17 14:32:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 14:32:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2021-12-17 14:32:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:48,365 INFO L225 Difference]: With dead ends: 9078 [2021-12-17 14:32:48,365 INFO L226 Difference]: Without dead ends: 6477 [2021-12-17 14:32:48,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 14:32:48,376 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 2903 mSDsluCounter, 3551 mSDsCounter, 0 mSdLazyCounter, 7012 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2965 SdHoareTripleChecker+Valid, 4534 SdHoareTripleChecker+Invalid, 8020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 7012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:48,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2965 Valid, 4534 Invalid, 8020 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1008 Valid, 7012 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-12-17 14:32:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6477 states. [2021-12-17 14:32:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6477 to 4520. [2021-12-17 14:32:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 3534 states have (on average 1.617430673457838) internal successors, (5716), 3691 states have internal predecessors, (5716), 767 states have call successors, (767), 191 states have call predecessors, (767), 218 states have return successors, (971), 757 states have call predecessors, (971), 762 states have call successors, (971) [2021-12-17 14:32:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 7454 transitions. [2021-12-17 14:32:48,864 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 7454 transitions. Word has length 156 [2021-12-17 14:32:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:48,865 INFO L470 AbstractCegarLoop]: Abstraction has 4520 states and 7454 transitions. [2021-12-17 14:32:48,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 14:32:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 7454 transitions. [2021-12-17 14:32:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-17 14:32:48,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:48,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:32:48,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 14:32:48,868 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:48,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1919000043, now seen corresponding path program 1 times [2021-12-17 14:32:48,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:48,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480672876] [2021-12-17 14:32:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:48,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:32:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:32:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:32:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 14:32:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:32:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 14:32:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:32:49,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:49,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480672876] [2021-12-17 14:32:49,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480672876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:32:49,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436156967] [2021-12-17 14:32:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:49,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:32:49,272 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:32:49,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 14:32:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:49,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1912 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:32:49,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:32:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 14:32:49,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:32:49,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436156967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:49,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:32:49,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-17 14:32:49,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473260503] [2021-12-17 14:32:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:49,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:32:49,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:32:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:32:49,753 INFO L87 Difference]: Start difference. First operand 4520 states and 7454 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 14:32:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:32:50,164 INFO L93 Difference]: Finished difference Result 8972 states and 15030 transitions. [2021-12-17 14:32:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:32:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 158 [2021-12-17 14:32:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:32:50,181 INFO L225 Difference]: With dead ends: 8972 [2021-12-17 14:32:50,181 INFO L226 Difference]: Without dead ends: 4570 [2021-12-17 14:32:50,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:32:50,193 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 22 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:32:50,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2479 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:32:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2021-12-17 14:32:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 4570. [2021-12-17 14:32:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 3574 states have (on average 1.6074426412982652) internal successors, (5745), 3736 states have internal predecessors, (5745), 767 states have call successors, (767), 196 states have call predecessors, (767), 228 states have return successors, (981), 757 states have call predecessors, (981), 762 states have call successors, (981) [2021-12-17 14:32:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 7493 transitions. [2021-12-17 14:32:50,674 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 7493 transitions. Word has length 158 [2021-12-17 14:32:50,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:32:50,675 INFO L470 AbstractCegarLoop]: Abstraction has 4570 states and 7493 transitions. [2021-12-17 14:32:50,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 14:32:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 7493 transitions. [2021-12-17 14:32:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 14:32:50,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:32:50,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-17 14:32:50,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-17 14:32:50,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:32:50,878 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:32:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:32:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash 788346076, now seen corresponding path program 1 times [2021-12-17 14:32:50,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:32:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046797105] [2021-12-17 14:32:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:32:50,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:32:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:50,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:32:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:50,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:32:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:32:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:32:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:32:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:32:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:32:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:32:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:32:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:32:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:32:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:32:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:32:51,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:32:51,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046797105] [2021-12-17 14:32:51,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046797105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:32:51,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:32:51,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 14:32:51,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425269894] [2021-12-17 14:32:51,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:32:51,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 14:32:51,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:32:51,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 14:32:51,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:32:51,226 INFO L87 Difference]: Start difference. First operand 4570 states and 7493 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 14:33:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:33:01,086 INFO L93 Difference]: Finished difference Result 10336 states and 17605 transitions. [2021-12-17 14:33:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 14:33:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 159 [2021-12-17 14:33:01,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:33:01,115 INFO L225 Difference]: With dead ends: 10336 [2021-12-17 14:33:01,115 INFO L226 Difference]: Without dead ends: 6594 [2021-12-17 14:33:01,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-12-17 14:33:01,125 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 2827 mSDsluCounter, 2556 mSDsCounter, 0 mSdLazyCounter, 6020 mSolverCounterSat, 921 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2887 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 6941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 921 IncrementalHoareTripleChecker+Valid, 6020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:33:01,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2887 Valid, 3475 Invalid, 6941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [921 Valid, 6020 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2021-12-17 14:33:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6594 states. [2021-12-17 14:33:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6594 to 4931. [2021-12-17 14:33:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3867 states have (on average 1.5877941556762347) internal successors, (6140), 4028 states have internal predecessors, (6140), 806 states have call successors, (806), 229 states have call predecessors, (806), 257 states have return successors, (1039), 793 states have call predecessors, (1039), 801 states have call successors, (1039) [2021-12-17 14:33:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7985 transitions. [2021-12-17 14:33:01,585 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7985 transitions. Word has length 159 [2021-12-17 14:33:01,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:33:01,586 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 7985 transitions. [2021-12-17 14:33:01,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 14:33:01,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7985 transitions. [2021-12-17 14:33:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 14:33:01,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:33:01,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:33:01,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 14:33:01,589 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:33:01,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:33:01,589 INFO L85 PathProgramCache]: Analyzing trace with hash -457741716, now seen corresponding path program 1 times [2021-12-17 14:33:01,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:33:01,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376211209] [2021-12-17 14:33:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:01,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:33:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:33:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:33:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:33:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:33:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:33:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:33:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:33:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:33:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 14:33:01,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:33:01,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376211209] [2021-12-17 14:33:01,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376211209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:33:01,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:33:01,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 14:33:01,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118355701] [2021-12-17 14:33:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:33:01,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:33:01,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:33:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:33:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:33:01,936 INFO L87 Difference]: Start difference. First operand 4931 states and 7985 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 5 states have internal predecessors, (112), 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) [2021-12-17 14:33:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:33:10,145 INFO L93 Difference]: Finished difference Result 13393 states and 22676 transitions. [2021-12-17 14:33:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 14:33:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 5 states have internal predecessors, (112), 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 164 [2021-12-17 14:33:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:33:10,180 INFO L225 Difference]: With dead ends: 13393 [2021-12-17 14:33:10,180 INFO L226 Difference]: Without dead ends: 9299 [2021-12-17 14:33:10,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:33:10,192 INFO L933 BasicCegarLoop]: 1472 mSDtfsCounter, 1733 mSDsluCounter, 2429 mSDsCounter, 0 mSdLazyCounter, 5416 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 3901 SdHoareTripleChecker+Invalid, 6137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 5416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:33:10,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1812 Valid, 3901 Invalid, 6137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 5416 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-12-17 14:33:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states. [2021-12-17 14:33:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9299 to 6999. [2021-12-17 14:33:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6999 states, 5498 states have (on average 1.5862131684248817) internal successors, (8721), 5725 states have internal predecessors, (8721), 1131 states have call successors, (1131), 319 states have call predecessors, (1131), 369 states have return successors, (1474), 1122 states have call predecessors, (1474), 1126 states have call successors, (1474) [2021-12-17 14:33:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6999 states to 6999 states and 11326 transitions. [2021-12-17 14:33:10,879 INFO L78 Accepts]: Start accepts. Automaton has 6999 states and 11326 transitions. Word has length 164 [2021-12-17 14:33:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:33:10,879 INFO L470 AbstractCegarLoop]: Abstraction has 6999 states and 11326 transitions. [2021-12-17 14:33:10,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 5 states have internal predecessors, (112), 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) [2021-12-17 14:33:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6999 states and 11326 transitions. [2021-12-17 14:33:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 14:33:10,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:33:10,882 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:33:10,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 14:33:10,882 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:33:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:33:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1829549014, now seen corresponding path program 1 times [2021-12-17 14:33:10,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:33:10,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436285287] [2021-12-17 14:33:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:10,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:33:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:10,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:33:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:33:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:33:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:33:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:33:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:33:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:33:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:33:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 14:33:11,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:33:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436285287] [2021-12-17 14:33:11,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436285287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:33:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95602076] [2021-12-17 14:33:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:11,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:33:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:33:11,340 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:33:11,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 14:33:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:11,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 14:33:11,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:33:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 14:33:11,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:33:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 14:33:12,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95602076] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 14:33:12,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 14:33:12,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 6] total 18 [2021-12-17 14:33:12,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679381299] [2021-12-17 14:33:12,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:33:12,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:33:12,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:33:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:33:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:33:12,150 INFO L87 Difference]: Start difference. First operand 6999 states and 11326 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-17 14:33:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:33:12,893 INFO L93 Difference]: Finished difference Result 7354 states and 11911 transitions. [2021-12-17 14:33:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:33:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 164 [2021-12-17 14:33:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:33:12,924 INFO L225 Difference]: With dead ends: 7354 [2021-12-17 14:33:12,924 INFO L226 Difference]: Without dead ends: 7339 [2021-12-17 14:33:12,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 355 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-12-17 14:33:12,930 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 67 mSDsluCounter, 2650 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:33:12,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 3556 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:33:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7339 states. [2021-12-17 14:33:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7339 to 7041. [2021-12-17 14:33:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5540 states have (on average 1.581768953068592) internal successors, (8763), 5767 states have internal predecessors, (8763), 1131 states have call successors, (1131), 319 states have call predecessors, (1131), 369 states have return successors, (1474), 1122 states have call predecessors, (1474), 1126 states have call successors, (1474) [2021-12-17 14:33:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 11368 transitions. [2021-12-17 14:33:13,599 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 11368 transitions. Word has length 164 [2021-12-17 14:33:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:33:13,599 INFO L470 AbstractCegarLoop]: Abstraction has 7041 states and 11368 transitions. [2021-12-17 14:33:13,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-17 14:33:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 11368 transitions. [2021-12-17 14:33:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-17 14:33:13,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:33:13,607 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:33:13,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-17 14:33:13,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-17 14:33:13,828 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:33:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:33:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash -541536223, now seen corresponding path program 1 times [2021-12-17 14:33:13,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:33:13,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703506425] [2021-12-17 14:33:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:13,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:33:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:33:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:13,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:13,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:13,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:33:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:33:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:33:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:33:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:33:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:33:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:33:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:33:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 14:33:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 14:33:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 14:33:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 14:33:14,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:33:14,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703506425] [2021-12-17 14:33:14,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703506425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:33:14,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522072303] [2021-12-17 14:33:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:14,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:33:14,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:33:14,327 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:33:14,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 14:33:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:14,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 2028 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 14:33:14,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:33:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 14:33:15,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:33:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-17 14:33:15,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522072303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:33:15,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:33:15,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 8] total 27 [2021-12-17 14:33:15,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108046130] [2021-12-17 14:33:15,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:33:15,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 14:33:15,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:33:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 14:33:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-12-17 14:33:15,877 INFO L87 Difference]: Start difference. First operand 7041 states and 11368 transitions. Second operand has 27 states, 27 states have (on average 10.592592592592593) internal successors, (286), 20 states have internal predecessors, (286), 9 states have call successors, (51), 8 states have call predecessors, (51), 14 states have return successors, (50), 14 states have call predecessors, (50), 9 states have call successors, (50) [2021-12-17 14:33:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:33:46,621 INFO L93 Difference]: Finished difference Result 42388 states and 77401 transitions. [2021-12-17 14:33:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-17 14:33:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 10.592592592592593) internal successors, (286), 20 states have internal predecessors, (286), 9 states have call successors, (51), 8 states have call predecessors, (51), 14 states have return successors, (50), 14 states have call predecessors, (50), 9 states have call successors, (50) Word has length 201 [2021-12-17 14:33:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:33:47,034 INFO L225 Difference]: With dead ends: 42388 [2021-12-17 14:33:47,034 INFO L226 Difference]: Without dead ends: 35453 [2021-12-17 14:33:47,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 447 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1809, Invalid=11301, Unknown=0, NotChecked=0, Total=13110 [2021-12-17 14:33:47,083 INFO L933 BasicCegarLoop]: 2491 mSDtfsCounter, 12881 mSDsluCounter, 12773 mSDsCounter, 0 mSdLazyCounter, 29626 mSolverCounterSat, 6695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12895 SdHoareTripleChecker+Valid, 15264 SdHoareTripleChecker+Invalid, 36321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 6695 IncrementalHoareTripleChecker+Valid, 29626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-12-17 14:33:47,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12895 Valid, 15264 Invalid, 36321 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [6695 Valid, 29626 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time] [2021-12-17 14:33:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35453 states. [2021-12-17 14:33:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35453 to 22875. [2021-12-17 14:33:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22875 states, 17490 states have (on average 1.5710691823899372) internal successors, (27478), 18305 states have internal predecessors, (27478), 4227 states have call successors, (4227), 873 states have call predecessors, (4227), 1157 states have return successors, (6418), 4306 states have call predecessors, (6418), 4222 states have call successors, (6418) [2021-12-17 14:33:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22875 states to 22875 states and 38123 transitions. [2021-12-17 14:33:49,902 INFO L78 Accepts]: Start accepts. Automaton has 22875 states and 38123 transitions. Word has length 201 [2021-12-17 14:33:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:33:49,903 INFO L470 AbstractCegarLoop]: Abstraction has 22875 states and 38123 transitions. [2021-12-17 14:33:49,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.592592592592593) internal successors, (286), 20 states have internal predecessors, (286), 9 states have call successors, (51), 8 states have call predecessors, (51), 14 states have return successors, (50), 14 states have call predecessors, (50), 9 states have call successors, (50) [2021-12-17 14:33:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 22875 states and 38123 transitions. [2021-12-17 14:33:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-17 14:33:49,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:33:49,926 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:33:49,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-17 14:33:50,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-17 14:33:50,140 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:33:50,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:33:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash -430460630, now seen corresponding path program 1 times [2021-12-17 14:33:50,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:33:50,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176234513] [2021-12-17 14:33:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:50,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:33:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:33:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:33:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:33:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:33:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:33:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:33:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:33:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:33:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:33:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 14:33:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 14:33:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 14:33:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-17 14:33:50,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:33:50,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176234513] [2021-12-17 14:33:50,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176234513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:33:50,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416164401] [2021-12-17 14:33:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:50,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:33:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:33:50,491 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:33:50,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 14:33:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:33:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:33:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 14:33:50,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:33:50,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416164401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:33:50,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:33:50,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:33:50,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667844721] [2021-12-17 14:33:50,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:33:50,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:33:50,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:33:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:33:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:33:50,998 INFO L87 Difference]: Start difference. First operand 22875 states and 38123 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-17 14:33:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:33:53,404 INFO L93 Difference]: Finished difference Result 46186 states and 77500 transitions. [2021-12-17 14:33:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:33:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 202 [2021-12-17 14:33:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:33:53,508 INFO L225 Difference]: With dead ends: 46186 [2021-12-17 14:33:53,508 INFO L226 Difference]: Without dead ends: 23495 [2021-12-17 14:33:53,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:33:53,576 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 17 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2480 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:33:53,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2480 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:33:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23495 states. [2021-12-17 14:33:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23495 to 23467. [2021-12-17 14:33:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23467 states, 17990 states have (on average 1.5669816564758199) internal successors, (28190), 18829 states have internal predecessors, (28190), 4227 states have call successors, (4227), 941 states have call predecessors, (4227), 1249 states have return successors, (6335), 4306 states have call predecessors, (6335), 4222 states have call successors, (6335) [2021-12-17 14:33:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23467 states to 23467 states and 38752 transitions. [2021-12-17 14:33:55,839 INFO L78 Accepts]: Start accepts. Automaton has 23467 states and 38752 transitions. Word has length 202 [2021-12-17 14:33:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:33:55,840 INFO L470 AbstractCegarLoop]: Abstraction has 23467 states and 38752 transitions. [2021-12-17 14:33:55,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-17 14:33:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 23467 states and 38752 transitions. [2021-12-17 14:33:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-17 14:33:55,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:33:55,859 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:33:55,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-17 14:33:56,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 14:33:56,060 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:33:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:33:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash 825298259, now seen corresponding path program 1 times [2021-12-17 14:33:56,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:33:56,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169118627] [2021-12-17 14:33:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:56,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:33:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:33:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:33:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 14:33:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:33:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 14:33:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:33:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:33:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 14:33:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 14:33:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 14:33:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:33:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:33:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:33:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:33:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 14:33:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 14:33:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 14:33:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 14:33:56,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:33:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169118627] [2021-12-17 14:33:56,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169118627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:33:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102233766] [2021-12-17 14:33:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:33:56,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:33:56,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:33:56,385 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:33:56,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 14:33:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:33:56,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:33:56,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:33:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-17 14:33:56,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:33:56,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102233766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:33:56,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:33:56,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-17 14:33:56,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514318951] [2021-12-17 14:33:56,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:33:56,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:33:56,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:33:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:33:56,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:33:56,872 INFO L87 Difference]: Start difference. First operand 23467 states and 38752 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-17 14:33:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:33:59,286 INFO L93 Difference]: Finished difference Result 37539 states and 61910 transitions. [2021-12-17 14:33:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:33:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 205 [2021-12-17 14:33:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:33:59,395 INFO L225 Difference]: With dead ends: 37539 [2021-12-17 14:33:59,395 INFO L226 Difference]: Without dead ends: 23524 [2021-12-17 14:33:59,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:33:59,445 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 85 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:33:59,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 2518 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:33:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23524 states. [2021-12-17 14:34:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23524 to 23464. [2021-12-17 14:34:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23464 states, 17987 states have (on average 1.5670206260076722) internal successors, (28186), 18826 states have internal predecessors, (28186), 4227 states have call successors, (4227), 941 states have call predecessors, (4227), 1249 states have return successors, (6335), 4306 states have call predecessors, (6335), 4222 states have call successors, (6335) [2021-12-17 14:34:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 38748 transitions. [2021-12-17 14:34:01,765 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 38748 transitions. Word has length 205 [2021-12-17 14:34:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:34:01,765 INFO L470 AbstractCegarLoop]: Abstraction has 23464 states and 38748 transitions. [2021-12-17 14:34:01,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-17 14:34:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 38748 transitions. [2021-12-17 14:34:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-17 14:34:01,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:34:01,785 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:34:01,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-17 14:34:01,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:34:01,999 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:34:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:34:01,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1159411223, now seen corresponding path program 1 times [2021-12-17 14:34:01,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:34:01,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964201914] [2021-12-17 14:34:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:34:02,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:34:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:34:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:34:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:34:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:34:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:34:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:34:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:34:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 14:34:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 14:34:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 14:34:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:34:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:34:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:34:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:34:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 14:34:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 14:34:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 14:34:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 14:34:02,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:34:02,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964201914] [2021-12-17 14:34:02,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964201914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:34:02,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164560437] [2021-12-17 14:34:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:34:02,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:34:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:34:02,312 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:34:02,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 14:34:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:34:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:34:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 14:34:02,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:34:02,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164560437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:34:02,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:34:02,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:34:02,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787785716] [2021-12-17 14:34:02,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:34:02,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:34:02,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:34:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:34:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:34:02,815 INFO L87 Difference]: Start difference. First operand 23464 states and 38748 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-17 14:34:05,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:34:05,462 INFO L93 Difference]: Finished difference Result 47021 states and 78545 transitions. [2021-12-17 14:34:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:34:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 206 [2021-12-17 14:34:05,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:34:05,590 INFO L225 Difference]: With dead ends: 47021 [2021-12-17 14:34:05,590 INFO L226 Difference]: Without dead ends: 23584 [2021-12-17 14:34:05,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:34:05,690 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 20 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:34:05,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2476 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:34:05,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23584 states. [2021-12-17 14:34:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23584 to 23544. [2021-12-17 14:34:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23544 states, 18087 states have (on average 1.5543760712113672) internal successors, (28114), 18886 states have internal predecessors, (28114), 4227 states have call successors, (4227), 961 states have call predecessors, (4227), 1229 states have return successors, (6223), 4306 states have call predecessors, (6223), 4222 states have call successors, (6223) [2021-12-17 14:34:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23544 states to 23544 states and 38564 transitions. [2021-12-17 14:34:08,001 INFO L78 Accepts]: Start accepts. Automaton has 23544 states and 38564 transitions. Word has length 206 [2021-12-17 14:34:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:34:08,002 INFO L470 AbstractCegarLoop]: Abstraction has 23544 states and 38564 transitions. [2021-12-17 14:34:08,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-17 14:34:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 23544 states and 38564 transitions. [2021-12-17 14:34:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-17 14:34:08,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:34:08,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:34:08,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-17 14:34:08,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:34:08,224 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:34:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:34:08,224 INFO L85 PathProgramCache]: Analyzing trace with hash 491447522, now seen corresponding path program 1 times [2021-12-17 14:34:08,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:34:08,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835380690] [2021-12-17 14:34:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:34:08,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:34:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:34:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:34:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:34:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:34:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:34:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:34:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:34:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 14:34:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 14:34:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 14:34:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:34:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:34:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:34:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:34:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 14:34:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 14:34:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 14:34:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-17 14:34:08,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:34:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835380690] [2021-12-17 14:34:08,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835380690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:34:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072967226] [2021-12-17 14:34:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:34:08,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:34:08,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:34:08,610 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:34:08,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 14:34:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:08,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2056 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 14:34:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:34:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 45 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 14:34:09,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:34:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 14:34:09,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072967226] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:34:09,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:34:09,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 19 [2021-12-17 14:34:09,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076904842] [2021-12-17 14:34:09,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:34:09,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 14:34:09,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:34:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 14:34:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-17 14:34:09,986 INFO L87 Difference]: Start difference. First operand 23544 states and 38564 transitions. Second operand has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 14 states have internal predecessors, (255), 7 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (49), 9 states have call predecessors, (49), 7 states have call successors, (49) [2021-12-17 14:34:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:34:33,781 INFO L93 Difference]: Finished difference Result 89702 states and 160387 transitions. [2021-12-17 14:34:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 14:34:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 14 states have internal predecessors, (255), 7 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (49), 9 states have call predecessors, (49), 7 states have call successors, (49) Word has length 209 [2021-12-17 14:34:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:34:34,378 INFO L225 Difference]: With dead ends: 89702 [2021-12-17 14:34:34,379 INFO L226 Difference]: Without dead ends: 65699 [2021-12-17 14:34:34,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 471 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=618, Invalid=2804, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 14:34:34,520 INFO L933 BasicCegarLoop]: 1954 mSDtfsCounter, 4617 mSDsluCounter, 6695 mSDsCounter, 0 mSdLazyCounter, 14238 mSolverCounterSat, 1937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4631 SdHoareTripleChecker+Valid, 8649 SdHoareTripleChecker+Invalid, 16175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1937 IncrementalHoareTripleChecker+Valid, 14238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:34:34,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4631 Valid, 8649 Invalid, 16175 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1937 Valid, 14238 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2021-12-17 14:34:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65699 states. [2021-12-17 14:34:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65699 to 51909. [2021-12-17 14:34:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51909 states, 38714 states have (on average 1.5461073513457664) internal successors, (59856), 40665 states have internal predecessors, (59856), 10677 states have call successors, (10677), 1877 states have call predecessors, (10677), 2517 states have return successors, (16173), 10890 states have call predecessors, (16173), 10672 states have call successors, (16173) [2021-12-17 14:34:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51909 states to 51909 states and 86706 transitions. [2021-12-17 14:34:40,783 INFO L78 Accepts]: Start accepts. Automaton has 51909 states and 86706 transitions. Word has length 209 [2021-12-17 14:34:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:34:40,784 INFO L470 AbstractCegarLoop]: Abstraction has 51909 states and 86706 transitions. [2021-12-17 14:34:40,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 14 states have internal predecessors, (255), 7 states have call successors, (52), 8 states have call predecessors, (52), 11 states have return successors, (49), 9 states have call predecessors, (49), 7 states have call successors, (49) [2021-12-17 14:34:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 51909 states and 86706 transitions. [2021-12-17 14:34:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-17 14:34:40,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:34:40,836 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:34:40,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-17 14:34:41,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:34:41,038 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:34:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:34:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash -457883285, now seen corresponding path program 1 times [2021-12-17 14:34:41,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:34:41,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705275006] [2021-12-17 14:34:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:34:41,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:34:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:34:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:34:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:34:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:34:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:34:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:34:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:34:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:34:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:34:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:34:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:34:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:34:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 14:34:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:34:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 14:34:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 14:34:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 14:34:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-17 14:34:41,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:34:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705275006] [2021-12-17 14:34:41,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705275006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:34:41,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179387409] [2021-12-17 14:34:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:34:41,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:34:41,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:34:41,366 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:34:41,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 14:34:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:34:41,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2028 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:34:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:34:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-17 14:34:41,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:34:41,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179387409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:34:41,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:34:41,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 14:34:41,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069124461] [2021-12-17 14:34:41,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:34:41,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:34:41,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:34:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:34:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:34:41,904 INFO L87 Difference]: Start difference. First operand 51909 states and 86706 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20)