./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/rlim_exit.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/rlim_exit.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d77357c243d95f35d00bc89e7fc23b91d82935f320cfab6cb2f6a7d192f5b03f --- 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-b5237d8 [2022-11-22 00:06:46,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:06:46,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:06:46,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:06:46,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:06:46,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:06:46,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:06:46,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:06:46,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:06:46,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:06:46,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:06:46,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:06:46,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:06:46,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:06:46,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:06:46,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:06:46,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:06:46,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:06:46,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:06:46,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:06:46,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:06:46,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:06:46,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:06:46,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:06:46,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:06:46,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:06:46,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:06:46,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:06:46,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:06:46,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:06:46,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:06:46,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:06:46,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:06:46,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:06:46,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:06:46,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:06:46,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:06:46,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:06:46,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:06:46,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:06:46,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:06:46,552 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:06:46,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:06:46,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:06:46,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:06:46,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:06:46,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:06:46,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:06:46,580 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:06:46,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:06:46,580 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:06:46,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:06:46,581 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:06:46,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:06:46,582 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:06:46,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:06:46,582 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:06:46,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:06:46,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:06:46,583 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:06:46,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:06:46,584 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:06:46,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:06:46,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:06:46,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:06:46,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:06:46,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:06:46,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:06:46,586 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:06:46,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:06:46,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:06:46,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:06:46,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:06:46,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:06:46,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:06:46,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:06:46,589 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:06:46,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:06:46,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:06:46,590 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:06:46,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:06:46,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:06:46,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:06:46,591 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_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d77357c243d95f35d00bc89e7fc23b91d82935f320cfab6cb2f6a7d192f5b03f [2022-11-22 00:06:46,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:06:46,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:06:46,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:06:46,853 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:06:46,854 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:06:46,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/float-benchs/rlim_exit.c [2022-11-22 00:06:49,917 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:06:50,154 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:06:50,155 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/sv-benchmarks/c/float-benchs/rlim_exit.c [2022-11-22 00:06:50,161 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/data/1bf1c3a4e/9d58a5cf631c437bad8e30996e849c55/FLAG9961a06c0 [2022-11-22 00:06:50,176 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/data/1bf1c3a4e/9d58a5cf631c437bad8e30996e849c55 [2022-11-22 00:06:50,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:06:50,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:06:50,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:06:50,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:06:50,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:06:50,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5083d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50, skipping insertion in model container [2022-11-22 00:06:50,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:06:50,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:06:50,409 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] [2022-11-22 00:06:50,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:06:50,442 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:06:50,456 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] [2022-11-22 00:06:50,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:06:50,478 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:06:50,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50 WrapperNode [2022-11-22 00:06:50,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:06:50,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:06:50,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:06:50,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:06:50,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,518 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-11-22 00:06:50,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:06:50,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:06:50,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:06:50,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:06:50,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,582 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:06:50,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:06:50,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:06:50,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:06:50,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (1/1) ... [2022-11-22 00:06:50,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:06:50,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:06:50,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:06:50,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:06:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:06:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 00:06:50,675 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 00:06:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:06:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:06:50,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:06:50,768 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:06:50,770 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:06:50,907 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:06:50,997 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:06:50,997 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 00:06:51,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:06:50 BoogieIcfgContainer [2022-11-22 00:06:51,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:06:51,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:06:51,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:06:51,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:06:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:06:50" (1/3) ... [2022-11-22 00:06:51,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310102f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:06:51, skipping insertion in model container [2022-11-22 00:06:51,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:06:50" (2/3) ... [2022-11-22 00:06:51,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310102f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:06:51, skipping insertion in model container [2022-11-22 00:06:51,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:06:50" (3/3) ... [2022-11-22 00:06:51,028 INFO L112 eAbstractionObserver]: Analyzing ICFG rlim_exit.c [2022-11-22 00:06:51,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:06:51,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:06:51,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:06:51,134 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;@59de428e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:06:51,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:06:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 00:06:51,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 00:06:51,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:51,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 00:06:51,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2680294, now seen corresponding path program 1 times [2022-11-22 00:06:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:51,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231347203] [2022-11-22 00:06:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:51,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:06:51,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:51,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231347203] [2022-11-22 00:06:51,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231347203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:06:51,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:06:51,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:06:51,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424496476] [2022-11-22 00:06:51,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:06:51,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:06:51,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:51,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:06:51,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:51,499 INFO L87 Difference]: Start difference. First operand has 12 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:51,554 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-11-22 00:06:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:06:51,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 00:06:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:51,564 INFO L225 Difference]: With dead ends: 21 [2022-11-22 00:06:51,565 INFO L226 Difference]: Without dead ends: 14 [2022-11-22 00:06:51,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:06:51,579 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:51,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:06:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-22 00:06:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2022-11-22 00:06:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 00:06:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-22 00:06:51,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2022-11-22 00:06:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:51,623 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-22 00:06:51,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:06:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-22 00:06:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:06:51,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:51,625 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:06:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:06:51,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:51,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash -695491792, now seen corresponding path program 1 times [2022-11-22 00:06:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255323211] [2022-11-22 00:06:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:51,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:06:51,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:51,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255323211] [2022-11-22 00:06:51,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255323211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:06:51,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391876037] [2022-11-22 00:06:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:51,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:06:51,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:06:51,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:06:51,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:06:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:06:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:06:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:06:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:06:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:06:51,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391876037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:06:51,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549464518] [2022-11-22 00:06:51,966 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:06:51,966 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:06:51,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:06:51,978 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:06:51,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:06:53,161 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 00:06:53,164 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:06:53,539 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:06:53,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:06:53,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:06:53,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-22 00:06:53,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103984851] [2022-11-22 00:06:53,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:06:53,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:06:53,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:06:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:06:53,552 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-22 00:06:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:53,620 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2022-11-22 00:06:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:06:53,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 12 [2022-11-22 00:06:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:53,622 INFO L225 Difference]: With dead ends: 26 [2022-11-22 00:06:53,622 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 00:06:53,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:06:53,626 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:53,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:06:53,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 00:06:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-22 00:06:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 00:06:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-22 00:06:53,645 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2022-11-22 00:06:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:53,645 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-22 00:06:53,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-22 00:06:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-22 00:06:53,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 00:06:53,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:53,648 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-22 00:06:53,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:06:53,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:06:53,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1212047118, now seen corresponding path program 2 times [2022-11-22 00:06:53,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:53,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522299172] [2022-11-22 00:06:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:53,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-22 00:06:54,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522299172] [2022-11-22 00:06:54,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522299172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:06:54,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803929100] [2022-11-22 00:06:54,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:06:54,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:06:54,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:06:54,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:06:54,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:06:54,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-22 00:06:54,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:06:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:06:54,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:06:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-22 00:06:54,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:06:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-22 00:06:54,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803929100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:06:54,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737362123] [2022-11-22 00:06:54,454 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:06:54,454 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:06:54,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:06:54,455 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:06:54,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:06:55,055 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 00:06:55,056 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:06:55,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:06:55,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:06:55,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:06:55,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-22 00:06:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4201939] [2022-11-22 00:06:55,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:06:55,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:06:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:06:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:06:55,421 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-22 00:06:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:55,571 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2022-11-22 00:06:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:06:55,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 36 [2022-11-22 00:06:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:55,574 INFO L225 Difference]: With dead ends: 50 [2022-11-22 00:06:55,574 INFO L226 Difference]: Without dead ends: 47 [2022-11-22 00:06:55,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:06:55,578 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:55,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:06:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-22 00:06:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-22 00:06:55,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-22 00:06:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2022-11-22 00:06:55,606 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 36 [2022-11-22 00:06:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:55,607 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2022-11-22 00:06:55,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-22 00:06:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2022-11-22 00:06:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 00:06:55,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:55,610 INFO L195 NwaCegarLoop]: trace histogram [20, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2022-11-22 00:06:55,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:06:55,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:06:55,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash -795399990, now seen corresponding path program 3 times [2022-11-22 00:06:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:55,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508179267] [2022-11-22 00:06:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:55,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-22 00:06:56,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508179267] [2022-11-22 00:06:56,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508179267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:06:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034682892] [2022-11-22 00:06:56,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:06:56,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:06:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:06:56,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:06:56,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:06:56,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:06:56,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:06:56,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 00:06:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:06:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-22 00:06:56,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:06:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-22 00:06:56,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034682892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:06:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006485360] [2022-11-22 00:06:56,863 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:06:56,863 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:06:56,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:06:56,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:06:56,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:06:57,338 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 00:06:57,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:06:57,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1137#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:06:57,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:06:57,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:06:57,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-22 00:06:57,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353731838] [2022-11-22 00:06:57,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:06:57,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 00:06:57,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:06:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 00:06:57,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=722, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 00:06:57,722 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 21 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 21 states have call predecessors, (42), 21 states have call successors, (42) [2022-11-22 00:06:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:06:58,007 INFO L93 Difference]: Finished difference Result 98 states and 152 transitions. [2022-11-22 00:06:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 00:06:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 21 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 21 states have call predecessors, (42), 21 states have call successors, (42) Word has length 84 [2022-11-22 00:06:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:06:58,010 INFO L225 Difference]: With dead ends: 98 [2022-11-22 00:06:58,010 INFO L226 Difference]: Without dead ends: 95 [2022-11-22 00:06:58,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=722, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 00:06:58,012 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:06:58,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:06:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-22 00:06:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-22 00:06:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-22 00:06:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 138 transitions. [2022-11-22 00:06:58,027 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 138 transitions. Word has length 84 [2022-11-22 00:06:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:06:58,028 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 138 transitions. [2022-11-22 00:06:58,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 21 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 21 states have call predecessors, (42), 21 states have call successors, (42) [2022-11-22 00:06:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 138 transitions. [2022-11-22 00:06:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-22 00:06:58,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:06:58,033 INFO L195 NwaCegarLoop]: trace histogram [44, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1] [2022-11-22 00:06:58,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:06:58,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:06:58,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:06:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:06:58,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1184760898, now seen corresponding path program 4 times [2022-11-22 00:06:58,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:06:58,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802695640] [2022-11-22 00:06:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:06:58,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:06:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-11-22 00:06:59,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:06:59,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802695640] [2022-11-22 00:06:59,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802695640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:06:59,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389035665] [2022-11-22 00:06:59,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:06:59,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:06:59,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:06:59,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:06:59,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:06:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:06:59,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 00:06:59,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:06:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-11-22 00:06:59,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:07:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-11-22 00:07:00,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389035665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:07:00,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320429062] [2022-11-22 00:07:00,774 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:07:00,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:07:00,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:07:00,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:07:00,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:07:01,231 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 00:07:01,233 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:07:01,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2597#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:07:01,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:07:01,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:07:01,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-22 00:07:01,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122795782] [2022-11-22 00:07:01,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:07:01,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-22 00:07:01,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:01,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-22 00:07:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1210, Invalid=1982, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 00:07:01,694 INFO L87 Difference]: Start difference. First operand 95 states and 138 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 45 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 45 states have call predecessors, (90), 45 states have call successors, (90) [2022-11-22 00:07:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:02,331 INFO L93 Difference]: Finished difference Result 194 states and 308 transitions. [2022-11-22 00:07:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-22 00:07:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 45 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 45 states have call predecessors, (90), 45 states have call successors, (90) Word has length 180 [2022-11-22 00:07:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:02,335 INFO L225 Difference]: With dead ends: 194 [2022-11-22 00:07:02,335 INFO L226 Difference]: Without dead ends: 191 [2022-11-22 00:07:02,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1210, Invalid=1982, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 00:07:02,337 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:02,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 108 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:07:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-22 00:07:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-22 00:07:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-22 00:07:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 282 transitions. [2022-11-22 00:07:02,363 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 282 transitions. Word has length 180 [2022-11-22 00:07:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:02,364 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 282 transitions. [2022-11-22 00:07:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 45 states have call successors, (90), 1 states have call predecessors, (90), 1 states have return successors, (90), 45 states have call predecessors, (90), 45 states have call successors, (90) [2022-11-22 00:07:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 282 transitions. [2022-11-22 00:07:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-11-22 00:07:02,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:02,374 INFO L195 NwaCegarLoop]: trace histogram [92, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1] [2022-11-22 00:07:02,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:02,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2076124366, now seen corresponding path program 5 times [2022-11-22 00:07:02,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:02,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142590300] [2022-11-22 00:07:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:02,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-11-22 00:07:06,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142590300] [2022-11-22 00:07:06,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142590300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648889299] [2022-11-22 00:07:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:07:06,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:06,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:06,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:07:06,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2022-11-22 00:07:06,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:07:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-22 00:07:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-11-22 00:07:07,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:07:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-11-22 00:07:10,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648889299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:07:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455667277] [2022-11-22 00:07:10,863 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:07:10,863 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:07:10,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:07:10,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:07:10,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:07:11,290 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 00:07:11,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:07:11,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5593#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:07:11,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:07:11,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:07:11,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-11-22 00:07:11,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161397028] [2022-11-22 00:07:11,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:07:11,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-22 00:07:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-22 00:07:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4690, Invalid=6230, Unknown=0, NotChecked=0, Total=10920 [2022-11-22 00:07:11,909 INFO L87 Difference]: Start difference. First operand 191 states and 282 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 93 states have call successors, (186), 1 states have call predecessors, (186), 1 states have return successors, (186), 93 states have call predecessors, (186), 93 states have call successors, (186) [2022-11-22 00:07:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:13,037 INFO L93 Difference]: Finished difference Result 386 states and 620 transitions. [2022-11-22 00:07:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-22 00:07:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 93 states have call successors, (186), 1 states have call predecessors, (186), 1 states have return successors, (186), 93 states have call predecessors, (186), 93 states have call successors, (186) Word has length 372 [2022-11-22 00:07:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:13,043 INFO L225 Difference]: With dead ends: 386 [2022-11-22 00:07:13,043 INFO L226 Difference]: Without dead ends: 383 [2022-11-22 00:07:13,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1163 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4690, Invalid=6230, Unknown=0, NotChecked=0, Total=10920 [2022-11-22 00:07:13,054 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 141 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:13,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 212 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 00:07:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-22 00:07:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-11-22 00:07:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 193 states have (on average 1.005181347150259) internal successors, (194), 193 states have internal predecessors, (194), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-22 00:07:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 570 transitions. [2022-11-22 00:07:13,109 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 570 transitions. Word has length 372 [2022-11-22 00:07:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:13,111 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 570 transitions. [2022-11-22 00:07:13,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 93 states have call successors, (186), 1 states have call predecessors, (186), 1 states have return successors, (186), 93 states have call predecessors, (186), 93 states have call successors, (186) [2022-11-22 00:07:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 570 transitions. [2022-11-22 00:07:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2022-11-22 00:07:13,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:13,148 INFO L195 NwaCegarLoop]: trace histogram [188, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1] [2022-11-22 00:07:13,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:13,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:13,356 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash 668666130, now seen corresponding path program 6 times [2022-11-22 00:07:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:13,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910553890] [2022-11-22 00:07:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 52734 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2022-11-22 00:07:26,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:26,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910553890] [2022-11-22 00:07:26,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910553890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:26,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95316380] [2022-11-22 00:07:26,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:07:26,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:26,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:26,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:26,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:07:27,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:07:27,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:07:27,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-22 00:07:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 52734 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2022-11-22 00:07:27,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:07:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 52734 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2022-11-22 00:07:39,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95316380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:07:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858942609] [2022-11-22 00:07:39,784 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:07:39,784 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:07:39,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:07:39,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:07:39,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:07:40,189 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 00:07:40,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:07:41,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11661#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:07:41,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:07:41,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:07:41,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-11-22 00:07:41,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753956411] [2022-11-22 00:07:41,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:07:41,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-22 00:07:41,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-22 00:07:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18562, Invalid=21638, Unknown=0, NotChecked=0, Total=40200 [2022-11-22 00:07:41,027 INFO L87 Difference]: Start difference. First operand 383 states and 570 transitions. Second operand has 193 states, 193 states have (on average 2.0) internal successors, (386), 193 states have internal predecessors, (386), 189 states have call successors, (378), 1 states have call predecessors, (378), 1 states have return successors, (378), 189 states have call predecessors, (378), 189 states have call successors, (378) [2022-11-22 00:07:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:43,851 INFO L93 Difference]: Finished difference Result 770 states and 1244 transitions. [2022-11-22 00:07:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-22 00:07:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0) internal successors, (386), 193 states have internal predecessors, (386), 189 states have call successors, (378), 1 states have call predecessors, (378), 1 states have return successors, (378), 189 states have call predecessors, (378), 189 states have call successors, (378) Word has length 756 [2022-11-22 00:07:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:43,866 INFO L225 Difference]: With dead ends: 770 [2022-11-22 00:07:43,867 INFO L226 Difference]: Without dead ends: 767 [2022-11-22 00:07:43,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2363 GetRequests, 2164 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=18562, Invalid=21638, Unknown=0, NotChecked=0, Total=40200 [2022-11-22 00:07:43,873 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 285 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:43,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 392 Invalid, 3031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 00:07:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-11-22 00:07:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-11-22 00:07:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 385 states have (on average 1.0025974025974025) internal successors, (386), 385 states have internal predecessors, (386), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2022-11-22 00:07:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1146 transitions. [2022-11-22 00:07:43,955 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1146 transitions. Word has length 756 [2022-11-22 00:07:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:43,962 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1146 transitions. [2022-11-22 00:07:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0) internal successors, (386), 193 states have internal predecessors, (386), 189 states have call successors, (378), 1 states have call predecessors, (378), 1 states have return successors, (378), 189 states have call predecessors, (378), 189 states have call successors, (378) [2022-11-22 00:07:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1146 transitions. [2022-11-22 00:07:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1525 [2022-11-22 00:07:44,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:44,039 INFO L195 NwaCegarLoop]: trace histogram [380, 190, 190, 190, 190, 190, 190, 1, 1, 1, 1] [2022-11-22 00:07:44,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:44,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:07:44,250 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:07:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:44,251 INFO L85 PathProgramCache]: Analyzing trace with hash 543253714, now seen corresponding path program 7 times [2022-11-22 00:07:44,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:44,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668897468] [2022-11-22 00:07:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:44,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 216030 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 144020 trivial. 0 not checked. [2022-11-22 00:08:38,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668897468] [2022-11-22 00:08:38,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668897468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214006770] [2022-11-22 00:08:38,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:08:38,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:38,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:38,970 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:38,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:08:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:40,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 4975 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-22 00:08:40,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 216030 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 144020 trivial. 0 not checked. [2022-11-22 00:08:41,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:09:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 216030 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 144020 trivial. 0 not checked. [2022-11-22 00:09:26,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214006770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:09:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116337690] [2022-11-22 00:09:26,509 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:09:26,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:09:26,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:09:26,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:09:26,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:09:26,888 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 00:09:26,889 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:09:28,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23873#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:09:28,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:09:28,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:09:28,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-11-22 00:09:28,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567387883] [2022-11-22 00:09:28,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:09:28,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-22 00:09:28,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:09:28,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-22 00:09:28,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73954, Invalid=80102, Unknown=0, NotChecked=0, Total=154056 [2022-11-22 00:09:28,317 INFO L87 Difference]: Start difference. First operand 767 states and 1146 transitions. Second operand has 385 states, 385 states have (on average 2.0) internal successors, (770), 385 states have internal predecessors, (770), 381 states have call successors, (762), 1 states have call predecessors, (762), 1 states have return successors, (762), 381 states have call predecessors, (762), 381 states have call successors, (762) [2022-11-22 00:09:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:09:38,012 INFO L93 Difference]: Finished difference Result 1538 states and 2492 transitions. [2022-11-22 00:09:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-22 00:09:38,015 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 2.0) internal successors, (770), 385 states have internal predecessors, (770), 381 states have call successors, (762), 1 states have call predecessors, (762), 1 states have return successors, (762), 381 states have call predecessors, (762), 381 states have call successors, (762) Word has length 1524 [2022-11-22 00:09:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:09:38,026 INFO L225 Difference]: With dead ends: 1538 [2022-11-22 00:09:38,027 INFO L226 Difference]: Without dead ends: 1535 [2022-11-22 00:09:38,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4763 GetRequests, 4372 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5360 ImplicationChecksByTransitivity, 58.3s TimeCoverageRelationStatistics Valid=73954, Invalid=80102, Unknown=0, NotChecked=0, Total=154056 [2022-11-22 00:09:38,040 INFO L413 NwaCegarLoop]: 768 mSDtfsCounter, 573 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5096 mSolverCounterSat, 1341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 6437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1341 IncrementalHoareTripleChecker+Valid, 5096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:09:38,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 800 Invalid, 6437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1341 Valid, 5096 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-22 00:09:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-11-22 00:09:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2022-11-22 00:09:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 769 states have (on average 1.0013003901170352) internal successors, (770), 769 states have internal predecessors, (770), 764 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 764 states have call predecessors, (764), 764 states have call successors, (764) [2022-11-22 00:09:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2298 transitions. [2022-11-22 00:09:38,138 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2298 transitions. Word has length 1524 [2022-11-22 00:09:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:09:38,141 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 2298 transitions. [2022-11-22 00:09:38,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 2.0) internal successors, (770), 385 states have internal predecessors, (770), 381 states have call successors, (762), 1 states have call predecessors, (762), 1 states have return successors, (762), 381 states have call predecessors, (762), 381 states have call successors, (762) [2022-11-22 00:09:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2298 transitions. [2022-11-22 00:09:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3061 [2022-11-22 00:09:38,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:09:38,218 INFO L195 NwaCegarLoop]: trace histogram [764, 382, 382, 382, 382, 382, 382, 1, 1, 1, 1] [2022-11-22 00:09:38,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:09:38,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:09:38,419 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:09:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:09:38,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1454775378, now seen corresponding path program 8 times [2022-11-22 00:09:38,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:09:38,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821751500] [2022-11-22 00:09:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:09:38,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:09:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:15:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 874398 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 582932 trivial. 0 not checked. [2022-11-22 00:15:08,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:15:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821751500] [2022-11-22 00:15:08,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821751500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:15:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151006789] [2022-11-22 00:15:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:15:08,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:15:08,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:15:08,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:15:08,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:15:35,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2022-11-22 00:15:35,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:15:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 9967 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-22 00:15:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:15:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 874398 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 582932 trivial. 0 not checked. [2022-11-22 00:15:38,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 874398 backedges. 0 proven. 291466 refuted. 0 times theorem prover too weak. 582932 trivial. 0 not checked. [2022-11-22 00:18:38,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151006789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:38,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1112168013] [2022-11-22 00:18:38,385 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:18:38,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:38,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:38,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:38,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:38,760 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 00:18:38,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:41,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48373#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:18:41,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:41,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:41,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2022-11-22 00:18:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900215716] [2022-11-22 00:18:41,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:41,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-11-22 00:18:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-11-22 00:18:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295330, Invalid=307622, Unknown=0, NotChecked=0, Total=602952 [2022-11-22 00:18:41,428 INFO L87 Difference]: Start difference. First operand 1535 states and 2298 transitions. Second operand has 769 states, 769 states have (on average 2.0) internal successors, (1538), 769 states have internal predecessors, (1538), 765 states have call successors, (1530), 1 states have call predecessors, (1530), 1 states have return successors, (1530), 765 states have call predecessors, (1530), 765 states have call successors, (1530) [2022-11-22 00:19:18,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:18,488 INFO L93 Difference]: Finished difference Result 3074 states and 4988 transitions. [2022-11-22 00:19:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-22 00:19:18,491 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 2.0) internal successors, (1538), 769 states have internal predecessors, (1538), 765 states have call successors, (1530), 1 states have call predecessors, (1530), 1 states have return successors, (1530), 765 states have call predecessors, (1530), 765 states have call successors, (1530) Word has length 3060 [2022-11-22 00:19:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:18,516 INFO L225 Difference]: With dead ends: 3074 [2022-11-22 00:19:18,516 INFO L226 Difference]: Without dead ends: 3071 [2022-11-22 00:19:18,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9563 GetRequests, 8788 SyntacticMatches, 0 SemanticMatches, 775 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10736 ImplicationChecksByTransitivity, 235.2s TimeCoverageRelationStatistics Valid=295330, Invalid=307622, Unknown=0, NotChecked=0, Total=602952 [2022-11-22 00:19:18,567 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 766 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 11180 mSolverCounterSat, 1919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 13099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1919 IncrementalHoareTripleChecker+Valid, 11180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:18,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 1568 Invalid, 13099 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1919 Valid, 11180 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-22 00:19:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2022-11-22 00:19:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3071. [2022-11-22 00:19:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 1537 states have (on average 1.0006506180871828) internal successors, (1538), 1537 states have internal predecessors, (1538), 1532 states have call successors, (1532), 1 states have call predecessors, (1532), 1 states have return successors, (1532), 1532 states have call predecessors, (1532), 1532 states have call successors, (1532) [2022-11-22 00:19:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 4602 transitions. [2022-11-22 00:19:18,764 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 4602 transitions. Word has length 3060 [2022-11-22 00:19:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:18,769 INFO L495 AbstractCegarLoop]: Abstraction has 3071 states and 4602 transitions. [2022-11-22 00:19:18,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 2.0) internal successors, (1538), 769 states have internal predecessors, (1538), 765 states have call successors, (1530), 1 states have call predecessors, (1530), 1 states have return successors, (1530), 765 states have call predecessors, (1530), 765 states have call successors, (1530) [2022-11-22 00:19:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 4602 transitions. [2022-11-22 00:19:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6133 [2022-11-22 00:19:19,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:19,235 INFO L195 NwaCegarLoop]: trace histogram [1532, 766, 766, 766, 766, 766, 766, 1, 1, 1, 1] [2022-11-22 00:19:19,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 00:19:19,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80df8c4f-cc1e-4b14-8d63-36c7fbe0cb7c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:19,435 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash -662729902, now seen corresponding path program 9 times [2022-11-22 00:19:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:19,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772460857] [2022-11-22 00:19:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat