./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1ab1611c68b20ff5721c195b0d2c7506cb1678fd2a0003f8a2214f630d652abe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:28:00,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:28:00,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:28:00,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:28:00,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:28:00,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:28:00,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:28:00,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:28:00,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:28:00,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:28:00,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:28:00,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:28:00,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:28:00,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:28:00,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:28:00,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:28:00,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:28:00,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:28:00,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:28:00,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:28:00,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:28:00,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:28:00,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:28:00,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:28:00,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:28:00,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:28:00,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:28:00,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:28:00,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:28:00,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:28:00,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:28:00,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:28:00,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:28:00,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:28:00,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:28:00,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:28:00,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:28:00,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:28:00,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:28:00,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:28:00,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:28:00,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-26 00:28:00,615 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:28:00,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:28:00,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:28:00,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:28:00,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:28:00,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:28:00,620 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:28:00,620 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:28:00,620 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:28:00,620 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:28:00,621 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:28:00,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:28:00,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:28:00,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:28:00,622 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:28:00,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:28:00,622 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:28:00,623 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:28:00,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:28:00,623 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:28:00,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:28:00,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:28:00,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:28:00,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:28:00,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:28:00,625 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-26 00:28:00,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:28:00,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:28:00,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:28:00,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:28:00,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:28:00,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:28:00,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:28:00,627 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:28:00,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:28:00,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:28:00,627 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:28:00,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:28:00,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:28:00,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:28:00,628 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ab1611c68b20ff5721c195b0d2c7506cb1678fd2a0003f8a2214f630d652abe [2022-11-26 00:28:00,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:28:00,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:28:00,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:28:00,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:28:00,974 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:28:00,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2022-11-26 00:28:04,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:28:04,293 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:28:04,293 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2022-11-26 00:28:04,299 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/data/284af736f/a9cba2016c834530a0be2000712e5a75/FLAGca98921e4 [2022-11-26 00:28:04,320 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/data/284af736f/a9cba2016c834530a0be2000712e5a75 [2022-11-26 00:28:04,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:28:04,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:28:04,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:28:04,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:28:04,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:28:04,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e8ff292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04, skipping insertion in model container [2022-11-26 00:28:04,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:28:04,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:28:04,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:28:04,548 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:28:04,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:28:04,575 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:28:04,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04 WrapperNode [2022-11-26 00:28:04,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:28:04,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:28:04,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:28:04,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:28:04,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,606 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 14 [2022-11-26 00:28:04,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:28:04,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:28:04,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:28:04,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:28:04,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:28:04,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:28:04,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:28:04,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:28:04,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (1/1) ... [2022-11-26 00:28:04,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:28:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:04,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:28:04,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:28:04,718 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-26 00:28:04,718 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-26 00:28:04,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:28:04,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:28:04,780 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:28:04,782 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:28:04,947 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:28:04,970 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:28:04,971 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:28:04,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:28:04 BoogieIcfgContainer [2022-11-26 00:28:04,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:28:04,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:28:04,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:28:04,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:28:04,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:28:04" (1/3) ... [2022-11-26 00:28:04,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d1f96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:28:04, skipping insertion in model container [2022-11-26 00:28:04,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:28:04" (2/3) ... [2022-11-26 00:28:04,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d1f96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:28:04, skipping insertion in model container [2022-11-26 00:28:04,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:28:04" (3/3) ... [2022-11-26 00:28:04,991 INFO L112 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2022-11-26 00:28:05,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:28:05,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-26 00:28:05,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:28:05,066 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a11cd9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:28:05,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-26 00:28:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.5) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:28:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:28:05,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:05,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:05,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:05,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1345845154, now seen corresponding path program 1 times [2022-11-26 00:28:05,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719478841] [2022-11-26 00:28:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:05,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:05,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:05,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719478841] [2022-11-26 00:28:05,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719478841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:05,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:05,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:28:05,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466470123] [2022-11-26 00:28:05,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:05,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:28:05,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:28:05,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:28:05,339 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.5) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:05,482 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-11-26 00:28:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:28:05,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:28:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:05,492 INFO L225 Difference]: With dead ends: 44 [2022-11-26 00:28:05,493 INFO L226 Difference]: Without dead ends: 28 [2022-11-26 00:28:05,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:28:05,499 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:05,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:28:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-26 00:28:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2022-11-26 00:28:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-26 00:28:05,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2022-11-26 00:28:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:05,538 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-26 00:28:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-26 00:28:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:28:05,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:05,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:05,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:28:05,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1345844930, now seen corresponding path program 1 times [2022-11-26 00:28:05,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077440143] [2022-11-26 00:28:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:05,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:05,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077440143] [2022-11-26 00:28:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077440143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:05,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:05,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:28:05,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694448470] [2022-11-26 00:28:05,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:05,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:28:05,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:28:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:28:05,649 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:05,734 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-11-26 00:28:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:28:05,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:28:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:05,735 INFO L225 Difference]: With dead ends: 28 [2022-11-26 00:28:05,735 INFO L226 Difference]: Without dead ends: 27 [2022-11-26 00:28:05,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:28:05,737 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:05,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:28:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-26 00:28:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-11-26 00:28:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-26 00:28:05,743 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2022-11-26 00:28:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:05,743 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-26 00:28:05,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-26 00:28:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:28:05,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:05,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:05,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:28:05,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:05,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1228473227, now seen corresponding path program 1 times [2022-11-26 00:28:05,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:05,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728052763] [2022-11-26 00:28:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:05,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:05,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728052763] [2022-11-26 00:28:05,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728052763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:05,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:05,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:28:05,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066118975] [2022-11-26 00:28:05,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:05,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:28:05,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:28:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:28:05,818 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:05,859 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-11-26 00:28:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:28:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:28:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:05,861 INFO L225 Difference]: With dead ends: 34 [2022-11-26 00:28:05,861 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 00:28:05,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:28:05,863 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:05,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:28:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 00:28:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-11-26 00:28:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-26 00:28:05,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2022-11-26 00:28:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:05,870 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-26 00:28:05,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-26 00:28:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:28:05,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:05,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:05,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:28:05,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1228480178, now seen corresponding path program 1 times [2022-11-26 00:28:05,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:05,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265289206] [2022-11-26 00:28:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:05,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:05,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:05,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265289206] [2022-11-26 00:28:05,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265289206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:05,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:28:05,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:28:05,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851323016] [2022-11-26 00:28:05,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:05,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:28:05,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:28:05,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:28:05,965 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:06,039 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-26 00:28:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:28:06,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:28:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:06,041 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:28:06,041 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 00:28:06,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:28:06,043 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:06,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:28:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 00:28:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-11-26 00:28:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.4) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-26 00:28:06,050 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2022-11-26 00:28:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:06,050 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-26 00:28:06,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-26 00:28:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:28:06,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:06,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:06,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:28:06,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1579103874, now seen corresponding path program 1 times [2022-11-26 00:28:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:06,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491094086] [2022-11-26 00:28:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:06,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:06,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491094086] [2022-11-26 00:28:06,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491094086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:06,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906632412] [2022-11-26 00:28:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:06,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:06,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:06,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:06,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:28:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:06,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:28:06,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:06,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:06,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906632412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:06,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [625720442] [2022-11-26 00:28:06,385 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:28:06,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:06,389 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:06,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:06,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-26 00:28:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557777873] [2022-11-26 00:28:06,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:06,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:28:06,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:06,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:28:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:28:06,393 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:06,504 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-11-26 00:28:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:28:06,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:28:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:06,506 INFO L225 Difference]: With dead ends: 65 [2022-11-26 00:28:06,506 INFO L226 Difference]: Without dead ends: 64 [2022-11-26 00:28:06,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:28:06,508 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:06,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 98 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:28:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-26 00:28:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2022-11-26 00:28:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 39 states have internal predecessors, (46), 7 states have call successors, (7), 6 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-26 00:28:06,518 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2022-11-26 00:28:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:06,518 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-26 00:28:06,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-26 00:28:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:28:06,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:06,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:06,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:06,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:06,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1579103650, now seen corresponding path program 1 times [2022-11-26 00:28:06,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:06,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599375286] [2022-11-26 00:28:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:06,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:06,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599375286] [2022-11-26 00:28:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599375286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584156218] [2022-11-26 00:28:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:06,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:06,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:28:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:28:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:06,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:28:06,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584156218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:06,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:28:06,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-26 00:28:06,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842898173] [2022-11-26 00:28:06,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:06,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:28:06,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:28:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:28:06,936 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:07,013 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-11-26 00:28:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:28:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:28:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:07,015 INFO L225 Difference]: With dead ends: 59 [2022-11-26 00:28:07,015 INFO L226 Difference]: Without dead ends: 58 [2022-11-26 00:28:07,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:28:07,016 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:07,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:28:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-26 00:28:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-11-26 00:28:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 42 states have internal predecessors, (51), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-11-26 00:28:07,027 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 13 [2022-11-26 00:28:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:07,027 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-11-26 00:28:07,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-11-26 00:28:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:28:07,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:07,028 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:07,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:07,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:07,234 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash -144523847, now seen corresponding path program 1 times [2022-11-26 00:28:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:07,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667142426] [2022-11-26 00:28:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:07,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667142426] [2022-11-26 00:28:07,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667142426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:07,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867416678] [2022-11-26 00:28:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:07,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:07,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:07,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:07,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:28:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:07,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:28:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:07,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:07,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867416678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:07,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468698945] [2022-11-26 00:28:07,497 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:28:07,497 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:07,498 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:07,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:07,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-26 00:28:07,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992385861] [2022-11-26 00:28:07,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:07,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:28:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:28:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:28:07,502 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:07,960 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-11-26 00:28:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:28:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:28:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:07,962 INFO L225 Difference]: With dead ends: 100 [2022-11-26 00:28:07,962 INFO L226 Difference]: Without dead ends: 98 [2022-11-26 00:28:07,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:28:07,963 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:07,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 73 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:28:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-26 00:28:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2022-11-26 00:28:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 61 states have internal predecessors, (78), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-11-26 00:28:07,985 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 13 [2022-11-26 00:28:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:07,985 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-11-26 00:28:07,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-11-26 00:28:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:28:07,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:07,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:07,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:08,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:08,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash -144523623, now seen corresponding path program 1 times [2022-11-26 00:28:08,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:08,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901110300] [2022-11-26 00:28:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:08,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:08,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:08,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901110300] [2022-11-26 00:28:08,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901110300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:08,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376344060] [2022-11-26 00:28:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:08,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:08,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:08,250 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:08,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:28:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:28:08,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:08,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:08,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376344060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:08,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977192159] [2022-11-26 00:28:08,378 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:28:08,378 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:08,378 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:08,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:08,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-26 00:28:08,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791848492] [2022-11-26 00:28:08,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:08,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:28:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:28:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:28:08,382 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:08,816 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2022-11-26 00:28:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 00:28:08,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:28:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:08,818 INFO L225 Difference]: With dead ends: 116 [2022-11-26 00:28:08,818 INFO L226 Difference]: Without dead ends: 114 [2022-11-26 00:28:08,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:28:08,820 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:08,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 42 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:28:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-26 00:28:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2022-11-26 00:28:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.3428571428571427) internal successors, (94), 74 states have internal predecessors, (94), 14 states have call successors, (14), 13 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-11-26 00:28:08,842 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 13 [2022-11-26 00:28:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:08,842 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-11-26 00:28:08,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:08,843 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-11-26 00:28:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:28:08,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:08,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:08,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:09,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:28:09,055 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:09,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1707572846, now seen corresponding path program 1 times [2022-11-26 00:28:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:09,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875381311] [2022-11-26 00:28:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:09,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:09,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875381311] [2022-11-26 00:28:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875381311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195947329] [2022-11-26 00:28:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:09,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:09,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:09,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:28:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:09,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:28:09,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:09,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:28:09,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195947329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:09,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:28:09,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2022-11-26 00:28:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812565089] [2022-11-26 00:28:09,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:09,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:28:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:28:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:28:09,206 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:09,276 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2022-11-26 00:28:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:28:09,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:28:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:09,279 INFO L225 Difference]: With dead ends: 101 [2022-11-26 00:28:09,279 INFO L226 Difference]: Without dead ends: 100 [2022-11-26 00:28:09,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:28:09,280 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:09,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 46 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:28:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-26 00:28:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2022-11-26 00:28:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 78 states have internal predecessors, (98), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-11-26 00:28:09,296 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 14 [2022-11-26 00:28:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:09,297 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-11-26 00:28:09,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-11-26 00:28:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:28:09,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:09,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:09,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:09,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:09,513 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash -185271920, now seen corresponding path program 1 times [2022-11-26 00:28:09,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:09,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741972516] [2022-11-26 00:28:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:09,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:09,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:09,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741972516] [2022-11-26 00:28:09,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741972516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:09,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20830074] [2022-11-26 00:28:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:09,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:09,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:09,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:09,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:28:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:09,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:28:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:09,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:28:09,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20830074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:09,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:28:09,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2022-11-26 00:28:09,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289016640] [2022-11-26 00:28:09,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:09,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:28:09,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:28:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:28:09,690 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:09,757 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2022-11-26 00:28:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:28:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:28:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:09,758 INFO L225 Difference]: With dead ends: 97 [2022-11-26 00:28:09,758 INFO L226 Difference]: Without dead ends: 96 [2022-11-26 00:28:09,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:28:09,759 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:09,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:28:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-26 00:28:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2022-11-26 00:28:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 71 states have internal predecessors, (88), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2022-11-26 00:28:09,777 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 14 [2022-11-26 00:28:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:09,778 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2022-11-26 00:28:09,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2022-11-26 00:28:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:28:09,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:09,779 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:09,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:09,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:28:09,984 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash -185264969, now seen corresponding path program 1 times [2022-11-26 00:28:09,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:09,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641609270] [2022-11-26 00:28:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:10,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:10,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641609270] [2022-11-26 00:28:10,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641609270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:10,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775563517] [2022-11-26 00:28:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:10,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:10,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:28:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:10,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:28:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:10,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775563517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:10,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1088694172] [2022-11-26 00:28:10,206 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:28:10,206 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:10,207 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:10,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:10,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-26 00:28:10,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272013027] [2022-11-26 00:28:10,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:10,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:28:10,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:10,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:28:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:28:10,211 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:10,343 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2022-11-26 00:28:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:28:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:28:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:10,345 INFO L225 Difference]: With dead ends: 85 [2022-11-26 00:28:10,345 INFO L226 Difference]: Without dead ends: 84 [2022-11-26 00:28:10,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:28:10,346 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:10,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:28:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-26 00:28:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-11-26 00:28:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 64 states have internal predecessors, (74), 13 states have call successors, (13), 11 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-11-26 00:28:10,369 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 14 [2022-11-26 00:28:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:10,369 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-11-26 00:28:10,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-11-26 00:28:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:28:10,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:10,376 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:10,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:10,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:28:10,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:10,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1296971769, now seen corresponding path program 1 times [2022-11-26 00:28:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:10,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308576368] [2022-11-26 00:28:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:10,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:10,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:10,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308576368] [2022-11-26 00:28:10,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308576368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:10,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067863611] [2022-11-26 00:28:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:10,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:10,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:10,681 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:10,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:28:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:28:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:10,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:10,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067863611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:10,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385725719] [2022-11-26 00:28:10,980 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:28:10,980 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:10,981 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:10,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:10,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-11-26 00:28:10,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592082820] [2022-11-26 00:28:10,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:10,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:28:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:28:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:28:10,988 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 22 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 13 states have internal predecessors, (50), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:11,822 INFO L93 Difference]: Finished difference Result 150 states and 174 transitions. [2022-11-26 00:28:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:28:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 13 states have internal predecessors, (50), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-26 00:28:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:11,825 INFO L225 Difference]: With dead ends: 150 [2022-11-26 00:28:11,825 INFO L226 Difference]: Without dead ends: 148 [2022-11-26 00:28:11,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=2203, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:28:11,827 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 308 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:11,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 64 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:28:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-26 00:28:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 76. [2022-11-26 00:28:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 63 states have internal predecessors, (76), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-11-26 00:28:11,842 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 25 [2022-11-26 00:28:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:11,843 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-11-26 00:28:11,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 13 states have internal predecessors, (50), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-11-26 00:28:11,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:28:11,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:11,844 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:11,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:12,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:28:12,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:12,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1135914132, now seen corresponding path program 1 times [2022-11-26 00:28:12,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:12,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155818951] [2022-11-26 00:28:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:12,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:12,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155818951] [2022-11-26 00:28:12,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155818951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117182415] [2022-11-26 00:28:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:12,162 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:12,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:28:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:12,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:28:12,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:12,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:12,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117182415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:12,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029834888] [2022-11-26 00:28:12,429 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:28:12,429 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:12,430 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:12,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:12,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-11-26 00:28:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384312840] [2022-11-26 00:28:12,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:12,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:28:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:12,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:28:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:28:12,435 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:13,023 INFO L93 Difference]: Finished difference Result 194 states and 221 transitions. [2022-11-26 00:28:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 00:28:13,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-26 00:28:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:13,025 INFO L225 Difference]: With dead ends: 194 [2022-11-26 00:28:13,025 INFO L226 Difference]: Without dead ends: 192 [2022-11-26 00:28:13,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:28:13,028 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 140 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:13,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 55 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:28:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-26 00:28:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 118. [2022-11-26 00:28:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 98 states have internal predecessors, (118), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2022-11-26 00:28:13,057 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 25 [2022-11-26 00:28:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:13,058 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2022-11-26 00:28:13,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2022-11-26 00:28:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:28:13,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:13,059 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 00:28:13,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:13,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:13,264 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash 893739727, now seen corresponding path program 2 times [2022-11-26 00:28:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274366576] [2022-11-26 00:28:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:13,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:13,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:13,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274366576] [2022-11-26 00:28:13,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274366576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603614665] [2022-11-26 00:28:13,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:28:13,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:13,429 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:13,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:28:13,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:28:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:28:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:13,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:13,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603614665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:13,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701883404] [2022-11-26 00:28:13,767 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:28:13,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:13,767 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:13,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:13,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-26 00:28:13,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376908723] [2022-11-26 00:28:13,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:13,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:28:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:28:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:28:13,769 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:14,750 INFO L93 Difference]: Finished difference Result 234 states and 271 transitions. [2022-11-26 00:28:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 00:28:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-26 00:28:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:14,751 INFO L225 Difference]: With dead ends: 234 [2022-11-26 00:28:14,752 INFO L226 Difference]: Without dead ends: 232 [2022-11-26 00:28:14,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:28:14,754 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 239 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:14,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 93 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:28:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-26 00:28:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 166. [2022-11-26 00:28:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 138 states have internal predecessors, (166), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 193 transitions. [2022-11-26 00:28:14,784 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 193 transitions. Word has length 37 [2022-11-26 00:28:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:14,785 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 193 transitions. [2022-11-26 00:28:14,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 193 transitions. [2022-11-26 00:28:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:28:14,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:14,786 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 00:28:14,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:14,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:28:14,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:14,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:14,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1636854415, now seen corresponding path program 3 times [2022-11-26 00:28:14,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:14,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489824181] [2022-11-26 00:28:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:14,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:15,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:15,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489824181] [2022-11-26 00:28:15,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489824181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:15,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695054716] [2022-11-26 00:28:15,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:28:15,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:15,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:15,160 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:15,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:28:15,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:28:15,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:28:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:28:15,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:28:15,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695054716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:15,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281166385] [2022-11-26 00:28:15,287 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:28:15,287 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:15,288 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:15,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:15,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2022-11-26 00:28:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701628921] [2022-11-26 00:28:15,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:28:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:28:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:28:15,291 INFO L87 Difference]: Start difference. First operand 166 states and 193 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 10 states have internal predecessors, (46), 7 states have call successors, (10), 8 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:15,601 INFO L93 Difference]: Finished difference Result 200 states and 232 transitions. [2022-11-26 00:28:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:28:15,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 10 states have internal predecessors, (46), 7 states have call successors, (10), 8 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-26 00:28:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:15,603 INFO L225 Difference]: With dead ends: 200 [2022-11-26 00:28:15,603 INFO L226 Difference]: Without dead ends: 82 [2022-11-26 00:28:15,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:28:15,605 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:15,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:28:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-26 00:28:15,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 41. [2022-11-26 00:28:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-26 00:28:15,615 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2022-11-26 00:28:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:15,616 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-26 00:28:15,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 10 states have internal predecessors, (46), 7 states have call successors, (10), 8 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-26 00:28:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:28:15,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:15,617 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:15,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:15,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:28:15,833 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1475796554, now seen corresponding path program 4 times [2022-11-26 00:28:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:15,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952698259] [2022-11-26 00:28:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:16,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:16,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952698259] [2022-11-26 00:28:16,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952698259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:16,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372675982] [2022-11-26 00:28:16,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:28:16,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:16,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:16,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:16,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:28:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:28:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:16,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:16,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372675982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521465244] [2022-11-26 00:28:16,376 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:28:16,376 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:16,376 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:16,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:16,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-26 00:28:16,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618517854] [2022-11-26 00:28:16,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:16,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 00:28:16,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 00:28:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:28:16,379 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:17,272 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2022-11-26 00:28:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-26 00:28:17,274 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-26 00:28:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:17,275 INFO L225 Difference]: With dead ends: 149 [2022-11-26 00:28:17,275 INFO L226 Difference]: Without dead ends: 148 [2022-11-26 00:28:17,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=855, Invalid=3567, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:28:17,278 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 386 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:17,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 45 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:28:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-26 00:28:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2022-11-26 00:28:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-11-26 00:28:17,307 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 37 [2022-11-26 00:28:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:17,307 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-11-26 00:28:17,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-11-26 00:28:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:28:17,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:17,308 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1] [2022-11-26 00:28:17,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:17,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:17,513 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:17,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2104341920, now seen corresponding path program 2 times [2022-11-26 00:28:17,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509023405] [2022-11-26 00:28:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:17,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:17,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509023405] [2022-11-26 00:28:17,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509023405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569487376] [2022-11-26 00:28:17,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:28:17,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:17,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:17,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:17,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:28:17,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:28:17,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:28:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:17,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:18,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569487376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:18,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64681975] [2022-11-26 00:28:18,211 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:28:18,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:18,212 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:18,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:18,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-11-26 00:28:18,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754965356] [2022-11-26 00:28:18,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:18,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:28:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:18,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:28:18,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:28:18,217 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 18 states have internal predecessors, (71), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:18,695 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2022-11-26 00:28:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 00:28:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 18 states have internal predecessors, (71), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-26 00:28:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:18,696 INFO L225 Difference]: With dead ends: 156 [2022-11-26 00:28:18,696 INFO L226 Difference]: Without dead ends: 155 [2022-11-26 00:28:18,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=438, Invalid=2214, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:28:18,698 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 187 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:18,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 80 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:28:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-26 00:28:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 89. [2022-11-26 00:28:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 74 states have internal predecessors, (75), 15 states have call successors, (15), 14 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-26 00:28:18,718 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 43 [2022-11-26 00:28:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:18,719 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-26 00:28:18,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 18 states have internal predecessors, (71), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-26 00:28:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 00:28:18,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:18,720 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:18,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:18,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:28:18,925 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:18,926 INFO L85 PathProgramCache]: Analyzing trace with hash -467673209, now seen corresponding path program 5 times [2022-11-26 00:28:18,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:18,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057127434] [2022-11-26 00:28:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:18,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:19,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:19,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057127434] [2022-11-26 00:28:19,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057127434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:19,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141977542] [2022-11-26 00:28:19,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:28:19,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:19,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:19,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:19,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:28:19,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-26 00:28:19,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 00:28:19,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:19,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:20,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141977542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:20,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803906287] [2022-11-26 00:28:20,492 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:28:20,493 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:20,493 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:20,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:20,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2022-11-26 00:28:20,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380233767] [2022-11-26 00:28:20,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:20,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-26 00:28:20,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:20,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-26 00:28:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:28:20,501 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:23,090 INFO L93 Difference]: Finished difference Result 301 states and 319 transitions. [2022-11-26 00:28:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-26 00:28:23,091 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-26 00:28:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:23,093 INFO L225 Difference]: With dead ends: 301 [2022-11-26 00:28:23,093 INFO L226 Difference]: Without dead ends: 300 [2022-11-26 00:28:23,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5805 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3601, Invalid=15581, Unknown=0, NotChecked=0, Total=19182 [2022-11-26 00:28:23,098 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 571 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:23,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 58 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:28:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-26 00:28:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 291. [2022-11-26 00:28:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 242 states have (on average 1.0289256198347108) internal successors, (249), 242 states have internal predecessors, (249), 48 states have call successors, (48), 48 states have call predecessors, (48), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 297 transitions. [2022-11-26 00:28:23,156 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 297 transitions. Word has length 79 [2022-11-26 00:28:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:23,156 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 297 transitions. [2022-11-26 00:28:23,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 297 transitions. [2022-11-26 00:28:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-26 00:28:23,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:23,158 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1] [2022-11-26 00:28:23,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:23,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:28:23,368 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449400, now seen corresponding path program 3 times [2022-11-26 00:28:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:23,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8484475] [2022-11-26 00:28:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:23,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:24,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:24,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8484475] [2022-11-26 00:28:24,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8484475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:24,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970065096] [2022-11-26 00:28:24,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:28:24,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:24,093 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:24,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:28:24,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:28:24,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:24,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:28:24,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:24,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:25,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970065096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545714566] [2022-11-26 00:28:25,274 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:28:25,274 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:25,274 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:25,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:25,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2022-11-26 00:28:25,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985597608] [2022-11-26 00:28:25,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:25,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-26 00:28:25,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:25,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-26 00:28:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=3484, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:28:25,278 INFO L87 Difference]: Start difference. First operand 291 states and 297 transitions. Second operand has 64 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 34 states have internal predecessors, (151), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:26,732 INFO L93 Difference]: Finished difference Result 332 states and 340 transitions. [2022-11-26 00:28:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-26 00:28:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 34 states have internal predecessors, (151), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-26 00:28:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:26,735 INFO L225 Difference]: With dead ends: 332 [2022-11-26 00:28:26,735 INFO L226 Difference]: Without dead ends: 331 [2022-11-26 00:28:26,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1766, Invalid=9790, Unknown=0, NotChecked=0, Total=11556 [2022-11-26 00:28:26,739 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 409 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:26,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 159 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:28:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-26 00:28:26,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 321. [2022-11-26 00:28:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 267 states have (on average 1.0149812734082397) internal successors, (271), 267 states have internal predecessors, (271), 53 states have call successors, (53), 53 states have call predecessors, (53), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 324 transitions. [2022-11-26 00:28:26,793 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 324 transitions. Word has length 91 [2022-11-26 00:28:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:26,793 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 324 transitions. [2022-11-26 00:28:26,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 34 states have internal predecessors, (151), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 324 transitions. [2022-11-26 00:28:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-26 00:28:26,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:26,796 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:26,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:27,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:27,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:27,002 INFO L85 PathProgramCache]: Analyzing trace with hash 502728166, now seen corresponding path program 6 times [2022-11-26 00:28:27,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:27,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280652450] [2022-11-26 00:28:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:27,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 0 proven. 1827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:28,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280652450] [2022-11-26 00:28:28,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280652450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561352685] [2022-11-26 00:28:28,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:28:28,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:28,761 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:28,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:28:28,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:28:28,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:28,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-26 00:28:28,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 0 proven. 1827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:29,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 0 proven. 1827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:31,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561352685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:31,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238144606] [2022-11-26 00:28:31,332 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:28:31,332 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:31,332 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:31,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:31,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-11-26 00:28:31,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618449681] [2022-11-26 00:28:31,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:31,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-26 00:28:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-26 00:28:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2022-11-26 00:28:31,338 INFO L87 Difference]: Start difference. First operand 321 states and 324 transitions. Second operand has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:40,289 INFO L93 Difference]: Finished difference Result 637 states and 677 transitions. [2022-11-26 00:28:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-11-26 00:28:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2022-11-26 00:28:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:40,291 INFO L225 Difference]: With dead ends: 637 [2022-11-26 00:28:40,291 INFO L226 Difference]: Without dead ends: 636 [2022-11-26 00:28:40,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26404 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=15135, Invalid=66947, Unknown=0, NotChecked=0, Total=82082 [2022-11-26 00:28:40,300 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1846 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:40,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1846 Valid, 96 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:28:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-11-26 00:28:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 621. [2022-11-26 00:28:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 517 states have (on average 1.0251450676982592) internal successors, (530), 517 states have internal predecessors, (530), 103 states have call successors, (103), 103 states have call predecessors, (103), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 633 transitions. [2022-11-26 00:28:40,422 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 633 transitions. Word has length 157 [2022-11-26 00:28:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:40,423 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 633 transitions. [2022-11-26 00:28:40,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 633 transitions. [2022-11-26 00:28:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-26 00:28:40,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:40,425 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1] [2022-11-26 00:28:40,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:40,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:40,632 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash -907866840, now seen corresponding path program 4 times [2022-11-26 00:28:40,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:40,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190134810] [2022-11-26 00:28:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:40,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:43,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:43,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190134810] [2022-11-26 00:28:43,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190134810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:43,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208013206] [2022-11-26 00:28:43,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:28:43,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:43,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:43,026 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:43,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:28:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:43,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 00:28:43,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:43,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:46,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208013206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292797168] [2022-11-26 00:28:46,322 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:28:46,322 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:46,322 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:28:46,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:28:46,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2022-11-26 00:28:46,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251316825] [2022-11-26 00:28:46,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:46,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-26 00:28:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-26 00:28:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2116, Invalid=14140, Unknown=0, NotChecked=0, Total=16256 [2022-11-26 00:28:46,333 INFO L87 Difference]: Start difference. First operand 621 states and 633 transitions. Second operand has 128 states, 125 states have (on average 2.488) internal successors, (311), 66 states have internal predecessors, (311), 62 states have call successors, (62), 62 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:50,766 INFO L93 Difference]: Finished difference Result 688 states and 704 transitions. [2022-11-26 00:28:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-11-26 00:28:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 125 states have (on average 2.488) internal successors, (311), 66 states have internal predecessors, (311), 62 states have call successors, (62), 62 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-11-26 00:28:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:50,770 INFO L225 Difference]: With dead ends: 688 [2022-11-26 00:28:50,770 INFO L226 Difference]: Without dead ends: 687 [2022-11-26 00:28:50,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14667 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=7110, Invalid=41070, Unknown=0, NotChecked=0, Total=48180 [2022-11-26 00:28:50,775 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 853 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:50,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 271 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:28:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-11-26 00:28:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 675. [2022-11-26 00:28:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 562 states have (on average 1.01067615658363) internal successors, (568), 562 states have internal predecessors, (568), 112 states have call successors, (112), 112 states have call predecessors, (112), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 680 transitions. [2022-11-26 00:28:50,945 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 680 transitions. Word has length 187 [2022-11-26 00:28:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:50,946 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 680 transitions. [2022-11-26 00:28:50,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 125 states have (on average 2.488) internal successors, (311), 66 states have internal predecessors, (311), 62 states have call successors, (62), 62 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 680 transitions. [2022-11-26 00:28:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-26 00:28:50,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:50,954 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 52, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:50,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:51,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-26 00:28:51,160 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:28:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:51,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1585167169, now seen corresponding path program 7 times [2022-11-26 00:28:51,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724475339] [2022-11-26 00:28:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:57,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:57,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724475339] [2022-11-26 00:28:57,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724475339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:28:57,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738213386] [2022-11-26 00:28:57,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:28:57,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:57,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:57,875 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:57,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:28:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:58,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-26 00:28:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:58,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:06,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738213386] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:06,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550056438] [2022-11-26 00:29:06,261 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:29:06,261 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:06,261 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:29:06,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:29:06,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2022-11-26 00:29:06,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129215684] [2022-11-26 00:29:06,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:06,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2022-11-26 00:29:06,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2022-11-26 00:29:06,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2022-11-26 00:29:06,272 INFO L87 Difference]: Start difference. First operand 675 states and 680 transitions. Second operand has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:39,219 INFO L93 Difference]: Finished difference Result 1277 states and 1355 transitions. [2022-11-26 00:29:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 471 states. [2022-11-26 00:29:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2022-11-26 00:29:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:39,224 INFO L225 Difference]: With dead ends: 1277 [2022-11-26 00:29:39,224 INFO L226 Difference]: Without dead ends: 1276 [2022-11-26 00:29:39,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1107 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115045 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=61281, Invalid=273381, Unknown=0, NotChecked=0, Total=334662 [2022-11-26 00:29:39,246 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3604 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3604 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:39,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3604 Valid, 116 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:29:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-11-26 00:29:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1251. [2022-11-26 00:29:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1042 states have (on average 1.0220729366602688) internal successors, (1065), 1042 states have internal predecessors, (1065), 208 states have call successors, (208), 208 states have call predecessors, (208), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1273 transitions. [2022-11-26 00:29:39,501 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1273 transitions. Word has length 319 [2022-11-26 00:29:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:39,503 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1273 transitions. [2022-11-26 00:29:39,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1273 transitions. [2022-11-26 00:29:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-11-26 00:29:39,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:39,512 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 62, 62, 62, 1, 1, 1, 1] [2022-11-26 00:29:39,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:39,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:39,728 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:29:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -276214648, now seen corresponding path program 5 times [2022-11-26 00:29:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:39,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140641570] [2022-11-26 00:29:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:39,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:48,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:48,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140641570] [2022-11-26 00:29:48,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140641570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:48,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649662041] [2022-11-26 00:29:48,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:29:48,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:48,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:48,668 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:48,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:29:49,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2022-11-26 00:29:49,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:29:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-26 00:29:49,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:49,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:00,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649662041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:00,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569547745] [2022-11-26 00:30:00,599 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:30:00,600 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:00,600 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:30:00,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:00,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 255 [2022-11-26 00:30:00,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458250626] [2022-11-26 00:30:00,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:00,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 256 states [2022-11-26 00:30:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2022-11-26 00:30:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8324, Invalid=56956, Unknown=0, NotChecked=0, Total=65280 [2022-11-26 00:30:00,615 INFO L87 Difference]: Start difference. First operand 1251 states and 1273 transitions. Second operand has 256 states, 253 states have (on average 2.494071146245059) internal successors, (631), 130 states have internal predecessors, (631), 126 states have call successors, (126), 126 states have call predecessors, (126), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:17,218 INFO L93 Difference]: Finished difference Result 1396 states and 1428 transitions. [2022-11-26 00:30:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2022-11-26 00:30:17,219 INFO L78 Accepts]: Start accepts. Automaton has has 256 states, 253 states have (on average 2.494071146245059) internal successors, (631), 130 states have internal predecessors, (631), 126 states have call successors, (126), 126 states have call predecessors, (126), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 379 [2022-11-26 00:30:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:17,224 INFO L225 Difference]: With dead ends: 1396 [2022-11-26 00:30:17,224 INFO L226 Difference]: Without dead ends: 1395 [2022-11-26 00:30:17,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 442 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62555 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=28550, Invalid=168142, Unknown=0, NotChecked=0, Total=196692 [2022-11-26 00:30:17,238 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2221 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2221 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:17,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2221 Valid, 505 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:30:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-11-26 00:30:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1377. [2022-11-26 00:30:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1147 states have (on average 1.010462074978204) internal successors, (1159), 1147 states have internal predecessors, (1159), 229 states have call successors, (229), 229 states have call predecessors, (229), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 1388 transitions. [2022-11-26 00:30:17,480 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 1388 transitions. Word has length 379 [2022-11-26 00:30:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:17,481 INFO L495 AbstractCegarLoop]: Abstraction has 1377 states and 1388 transitions. [2022-11-26 00:30:17,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 256 states, 253 states have (on average 2.494071146245059) internal successors, (631), 130 states have internal predecessors, (631), 126 states have call successors, (126), 126 states have call predecessors, (126), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 1388 transitions. [2022-11-26 00:30:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2022-11-26 00:30:17,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:17,500 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 105, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:17,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:17,707 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:30:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash 514833494, now seen corresponding path program 8 times [2022-11-26 00:30:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:17,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149567556] [2022-11-26 00:30:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32867 backedges. 0 proven. 32867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:43,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:43,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149567556] [2022-11-26 00:30:43,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149567556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:43,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154866413] [2022-11-26 00:30:43,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:30:43,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:43,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:43,471 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:43,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:30:44,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2022-11-26 00:30:44,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:44,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 214 conjunts are in the unsatisfiable core [2022-11-26 00:30:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 32867 backedges. 0 proven. 32867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:45,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 32867 backedges. 0 proven. 32867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:14,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154866413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:14,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19510042] [2022-11-26 00:31:14,509 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:31:14,509 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:14,509 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:31:14,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:31:14,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2022-11-26 00:31:14,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39684080] [2022-11-26 00:31:14,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:14,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2022-11-26 00:31:14,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:14,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2022-11-26 00:31:14,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23114, Invalid=159642, Unknown=0, NotChecked=0, Total=182756 [2022-11-26 00:31:14,538 INFO L87 Difference]: Start difference. First operand 1377 states and 1388 transitions. Second operand has 428 states, 425 states have (on average 2.496470588235294) internal successors, (1061), 216 states have internal predecessors, (1061), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:56,602 INFO L93 Difference]: Finished difference Result 2589 states and 2749 transitions. [2022-11-26 00:33:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 955 states. [2022-11-26 00:33:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 428 states, 425 states have (on average 2.496470588235294) internal successors, (1061), 216 states have internal predecessors, (1061), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 637 [2022-11-26 00:33:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:56,613 INFO L225 Difference]: With dead ends: 2589 [2022-11-26 00:33:56,613 INFO L226 Difference]: Without dead ends: 2588 [2022-11-26 00:33:56,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2225 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 1165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461564 ImplicationChecksByTransitivity, 157.0s TimeCoverageRelationStatistics Valid=248255, Invalid=1112467, Unknown=0, NotChecked=0, Total=1360722 [2022-11-26 00:33:56,692 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12516 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12516 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:56,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12516 Valid, 156 Invalid, 2620 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [126 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 00:33:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-11-26 00:33:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2541. [2022-11-26 00:33:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2117 states have (on average 1.0212564950401513) internal successors, (2162), 2117 states have internal predecessors, (2162), 423 states have call successors, (423), 423 states have call predecessors, (423), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 2585 transitions. [2022-11-26 00:33:57,119 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 2585 transitions. Word has length 637 [2022-11-26 00:33:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:57,120 INFO L495 AbstractCegarLoop]: Abstraction has 2541 states and 2585 transitions. [2022-11-26 00:33:57,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 428 states, 425 states have (on average 2.496470588235294) internal successors, (1061), 216 states have internal predecessors, (1061), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 2585 transitions. [2022-11-26 00:33:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 764 [2022-11-26 00:33:57,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:57,130 INFO L195 NwaCegarLoop]: trace histogram [127, 127, 127, 126, 126, 126, 1, 1, 1, 1] [2022-11-26 00:33:57,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-26 00:33:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:57,338 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:33:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash 869452616, now seen corresponding path program 6 times [2022-11-26 00:33:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:57,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422659060] [2022-11-26 00:33:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:57,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 47754 backedges. 0 proven. 47754 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:35,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422659060] [2022-11-26 00:34:35,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422659060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381091456] [2022-11-26 00:34:35,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:34:35,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:35,597 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:35,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 00:34:36,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:34:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 256 conjunts are in the unsatisfiable core [2022-11-26 00:34:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 47754 backedges. 0 proven. 47754 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:37,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 47754 backedges. 0 proven. 47754 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:35:18,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381091456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115288078] [2022-11-26 00:35:18,977 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:35:18,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:18,977 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:35:18,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:18,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [256, 256, 256] total 511 [2022-11-26 00:35:18,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270095926] [2022-11-26 00:35:18,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:18,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 512 states [2022-11-26 00:35:18,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:18,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 512 interpolants. [2022-11-26 00:35:19,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33028, Invalid=228604, Unknown=0, NotChecked=0, Total=261632 [2022-11-26 00:35:19,015 INFO L87 Difference]: Start difference. First operand 2541 states and 2585 transitions. Second operand has 512 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 258 states have internal predecessors, (1271), 254 states have call successors, (254), 254 states have call predecessors, (254), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:36:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:29,972 INFO L93 Difference]: Finished difference Result 2816 states and 2880 transitions. [2022-11-26 00:36:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 637 states. [2022-11-26 00:36:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 512 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 258 states have internal predecessors, (1271), 254 states have call successors, (254), 254 states have call predecessors, (254), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 763 [2022-11-26 00:36:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:29,987 INFO L225 Difference]: With dead ends: 2816 [2022-11-26 00:36:29,987 INFO L226 Difference]: Without dead ends: 2815 [2022-11-26 00:36:30,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2160 GetRequests, 1270 SyntacticMatches, 0 SemanticMatches, 890 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258171 ImplicationChecksByTransitivity, 110.2s TimeCoverageRelationStatistics Valid=114438, Invalid=680334, Unknown=0, NotChecked=0, Total=794772 [2022-11-26 00:36:30,026 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4943 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4943 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:30,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4943 Valid, 901 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-26 00:36:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2022-11-26 00:36:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2787. [2022-11-26 00:36:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2322 states have (on average 1.0094745908699396) internal successors, (2344), 2322 states have internal predecessors, (2344), 464 states have call successors, (464), 464 states have call predecessors, (464), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:36:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 2808 transitions. [2022-11-26 00:36:30,480 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 2808 transitions. Word has length 763 [2022-11-26 00:36:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:30,481 INFO L495 AbstractCegarLoop]: Abstraction has 2787 states and 2808 transitions. [2022-11-26 00:36:30,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 512 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 258 states have internal predecessors, (1271), 254 states have call successors, (254), 254 states have call predecessors, (254), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:36:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 2808 transitions. [2022-11-26 00:36:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1280 [2022-11-26 00:36:30,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:30,498 INFO L195 NwaCegarLoop]: trace histogram [213, 213, 212, 211, 211, 211, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:30,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:36:30,707 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-26 00:36:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1539425889, now seen corresponding path program 9 times [2022-11-26 00:36:30,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:30,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753406369] [2022-11-26 00:36:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:36:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 134410 backedges. 0 proven. 134410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:56,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753406369] [2022-11-26 00:38:56,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753406369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675664882] [2022-11-26 00:38:56,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:38:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:56,940 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:56,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2d20206-2f81-4fc0-b5dd-ed2ef90f9487/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 00:38:58,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:38:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:38:59,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 428 conjunts are in the unsatisfiable core [2022-11-26 00:38:59,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 134410 backedges. 0 proven. 134410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:00,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 134410 backedges. 0 proven. 134410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:56,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675664882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:56,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1607070546] [2022-11-26 00:40:56,234 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:40:56,234 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:40:56,235 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:40:56,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:40:56,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [428, 428, 428] total 855 [2022-11-26 00:40:56,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147968766] [2022-11-26 00:40:56,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:56,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 856 states [2022-11-26 00:40:56,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 856 interpolants. [2022-11-26 00:40:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92024, Invalid=639856, Unknown=0, NotChecked=0, Total=731880 [2022-11-26 00:40:56,313 INFO L87 Difference]: Start difference. First operand 2787 states and 2808 transitions. Second operand has 856 states, 853 states have (on average 2.4982415005861665) internal successors, (2131), 430 states have internal predecessors, (2131), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)