./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS --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 d72d7c845292578ad4711d5954bbaa34eac8266f0504ea14ab2c6e0b02bee46d --- 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-8393723 [2022-11-19 08:20:39,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:20:39,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:20:39,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:20:39,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:20:39,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:20:39,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:20:39,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:20:39,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:20:39,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:20:39,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:20:39,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:20:39,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:20:39,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:20:39,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:20:39,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:20:39,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:20:39,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:20:39,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:20:39,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:20:39,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:20:39,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:20:39,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:20:39,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:20:39,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:20:39,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:20:39,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:20:39,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:20:39,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:20:39,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:20:39,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:20:39,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:20:39,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:20:39,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:20:39,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:20:39,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:20:39,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:20:39,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:20:39,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:20:39,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:20:39,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:20:39,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:20:39,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:20:39,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:20:39,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:20:39,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:20:39,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:20:39,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:20:39,513 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:20:39,513 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:20:39,513 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:20:39,513 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:20:39,514 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:20:39,514 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:20:39,514 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:20:39,514 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:20:39,515 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:20:39,515 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:20:39,515 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:20:39,515 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:20:39,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:20:39,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:20:39,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:20:39,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:20:39,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:20:39,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:20:39,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:20:39,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:20:39,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:20:39,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:20:39,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:20:39,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:20:39,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:20:39,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:20:39,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:20:39,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:20:39,520 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:20:39,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:20:39,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:20:39,521 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:20:39,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:20:39,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:20:39,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:20:39,522 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_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d72d7c845292578ad4711d5954bbaa34eac8266f0504ea14ab2c6e0b02bee46d [2022-11-19 08:20:39,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:20:39,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:20:39,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:20:39,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:20:39,825 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:20:39,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2022-11-19 08:20:39,892 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/data/895d0a03e/b09ca5ef0e0d47e782e972beb6efc287/FLAGb20147ea8 [2022-11-19 08:20:40,543 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:20:40,547 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2022-11-19 08:20:40,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/data/895d0a03e/b09ca5ef0e0d47e782e972beb6efc287/FLAGb20147ea8 [2022-11-19 08:20:40,803 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/data/895d0a03e/b09ca5ef0e0d47e782e972beb6efc287 [2022-11-19 08:20:40,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:20:40,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:20:40,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:20:40,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:20:40,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:20:40,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:20:40" (1/1) ... [2022-11-19 08:20:40,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10be6be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:40, skipping insertion in model container [2022-11-19 08:20:40,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:20:40" (1/1) ... [2022-11-19 08:20:40,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:20:40,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:20:41,339 WARN L234 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_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c[31211,31224] [2022-11-19 08:20:41,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:20:41,367 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:20:41,465 WARN L234 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_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c[31211,31224] [2022-11-19 08:20:41,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:20:41,482 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:20:41,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41 WrapperNode [2022-11-19 08:20:41,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:20:41,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:20:41,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:20:41,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:20:41,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,549 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 962 [2022-11-19 08:20:41,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:20:41,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:20:41,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:20:41,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:20:41,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,595 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:20:41,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:20:41,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:20:41,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:20:41,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (1/1) ... [2022-11-19 08:20:41,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:20:41,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:20:41,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:20:41,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:20:41,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:20:41,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:20:41,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:20:41,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:20:41,925 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:20:41,928 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:20:42,997 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:20:44,262 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:20:44,262 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:20:44,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:20:44 BoogieIcfgContainer [2022-11-19 08:20:44,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:20:44,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:20:44,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:20:44,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:20:44,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:20:40" (1/3) ... [2022-11-19 08:20:44,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375652ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:20:44, skipping insertion in model container [2022-11-19 08:20:44,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:20:41" (2/3) ... [2022-11-19 08:20:44,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375652ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:20:44, skipping insertion in model container [2022-11-19 08:20:44,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:20:44" (3/3) ... [2022-11-19 08:20:44,279 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2022-11-19 08:20:44,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:20:44,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:20:44,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:20:44,397 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;@4cc360fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:20:44,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:20:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) [2022-11-19 08:20:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:20:44,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:44,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:44,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash -580422417, now seen corresponding path program 1 times [2022-11-19 08:20:44,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526707986] [2022-11-19 08:20:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:44,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:20:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:20:49,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:20:49,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526707986] [2022-11-19 08:20:49,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526707986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:20:49,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:20:49,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:20:49,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302190966] [2022-11-19 08:20:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:20:49,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:20:49,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:20:49,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:20:49,627 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-11-19 08:20:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:49,963 INFO L93 Difference]: Finished difference Result 177 states and 288 transitions. [2022-11-19 08:20:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:20:49,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-11-19 08:20:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:49,980 INFO L225 Difference]: With dead ends: 177 [2022-11-19 08:20:49,992 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 08:20:49,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:20:49,998 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 26 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:50,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 372 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:20:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 08:20:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2022-11-19 08:20:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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) [2022-11-19 08:20:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2022-11-19 08:20:50,076 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2022-11-19 08:20:50,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:50,077 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2022-11-19 08:20:50,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-11-19 08:20:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2022-11-19 08:20:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 08:20:50,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:50,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:20:50,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:50,086 INFO L85 PathProgramCache]: Analyzing trace with hash -881371658, now seen corresponding path program 1 times [2022-11-19 08:20:50,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:50,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453594504] [2022-11-19 08:20:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:50,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:20:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:20:52,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:20:52,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453594504] [2022-11-19 08:20:52,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453594504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:20:52,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:20:52,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:20:52,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838076804] [2022-11-19 08:20:52,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:20:52,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:20:52,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:52,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:20:52,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:20:52,750 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2022-11-19 08:20:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:53,005 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2022-11-19 08:20:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:20:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2022-11-19 08:20:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:53,007 INFO L225 Difference]: With dead ends: 180 [2022-11-19 08:20:53,007 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:20:53,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:20:53,009 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:53,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:20:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:20:53,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-19 08:20:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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) [2022-11-19 08:20:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2022-11-19 08:20:53,039 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2022-11-19 08:20:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:53,041 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2022-11-19 08:20:53,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2022-11-19 08:20:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2022-11-19 08:20:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 08:20:53,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:53,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:53,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:20:53,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:53,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1615411784, now seen corresponding path program 1 times [2022-11-19 08:20:53,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:53,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579709179] [2022-11-19 08:20:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:53,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:20:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:20:55,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:20:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579709179] [2022-11-19 08:20:55,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579709179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:20:55,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:20:55,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:20:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300811963] [2022-11-19 08:20:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:20:55,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:20:55,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:20:55,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:20:55,466 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2022-11-19 08:20:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:55,691 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2022-11-19 08:20:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:20:55,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2022-11-19 08:20:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:55,693 INFO L225 Difference]: With dead ends: 180 [2022-11-19 08:20:55,693 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:20:55,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:20:55,695 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:55,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:20:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:20:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-19 08:20:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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) [2022-11-19 08:20:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2022-11-19 08:20:55,713 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2022-11-19 08:20:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:55,713 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2022-11-19 08:20:55,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2022-11-19 08:20:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2022-11-19 08:20:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 08:20:55,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:55,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:55,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:20:55,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1404599839, now seen corresponding path program 1 times [2022-11-19 08:20:55,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:55,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666064593] [2022-11-19 08:20:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:20:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:20:58,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:20:58,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666064593] [2022-11-19 08:20:58,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666064593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:20:58,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:20:58,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:20:58,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552222491] [2022-11-19 08:20:58,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:20:58,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:20:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:58,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:20:58,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:20:58,175 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-19 08:20:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:58,375 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2022-11-19 08:20:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:20:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2022-11-19 08:20:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:58,378 INFO L225 Difference]: With dead ends: 180 [2022-11-19 08:20:58,378 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:20:58,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:20:58,380 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:58,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:20:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:20:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-19 08:20:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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) [2022-11-19 08:20:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2022-11-19 08:20:58,396 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2022-11-19 08:20:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:58,398 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2022-11-19 08:20:58,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-19 08:20:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2022-11-19 08:20:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 08:20:58,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:58,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:58,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:20:58,402 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:58,402 INFO L85 PathProgramCache]: Analyzing trace with hash 541131393, now seen corresponding path program 1 times [2022-11-19 08:20:58,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:58,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591662528] [2022-11-19 08:20:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:58,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:00,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:00,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591662528] [2022-11-19 08:21:00,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591662528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:00,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:21:00,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:21:00,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980019359] [2022-11-19 08:21:00,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:21:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:21:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:21:00,679 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-11-19 08:21:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:00,861 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2022-11-19 08:21:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:21:00,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2022-11-19 08:21:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:00,863 INFO L225 Difference]: With dead ends: 180 [2022-11-19 08:21:00,863 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:21:00,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:21:00,864 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:00,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 382 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:21:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:21:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-19 08:21:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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) [2022-11-19 08:21:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2022-11-19 08:21:00,874 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2022-11-19 08:21:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:00,874 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2022-11-19 08:21:00,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-11-19 08:21:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2022-11-19 08:21:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 08:21:00,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:00,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:00,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:21:00,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:00,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1139230871, now seen corresponding path program 1 times [2022-11-19 08:21:00,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:00,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123557759] [2022-11-19 08:21:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:00,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:03,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123557759] [2022-11-19 08:21:03,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123557759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:03,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:21:03,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:21:03,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338996660] [2022-11-19 08:21:03,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:03,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:21:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:21:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:21:03,369 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-11-19 08:21:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:03,552 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2022-11-19 08:21:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:21:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2022-11-19 08:21:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:03,554 INFO L225 Difference]: With dead ends: 178 [2022-11-19 08:21:03,554 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 08:21:03,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:21:03,556 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:03,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 377 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:21:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 08:21:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2022-11-19 08:21:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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) [2022-11-19 08:21:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2022-11-19 08:21:03,564 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2022-11-19 08:21:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:03,564 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2022-11-19 08:21:03,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-11-19 08:21:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2022-11-19 08:21:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:21:03,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:03,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:03,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:21:03,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1044405354, now seen corresponding path program 1 times [2022-11-19 08:21:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:03,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718461525] [2022-11-19 08:21:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:05,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718461525] [2022-11-19 08:21:05,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718461525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:05,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:21:05,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:21:05,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684678065] [2022-11-19 08:21:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:21:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:21:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:21:05,893 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2022-11-19 08:21:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:06,105 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2022-11-19 08:21:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:21:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2022-11-19 08:21:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:06,109 INFO L225 Difference]: With dead ends: 179 [2022-11-19 08:21:06,109 INFO L226 Difference]: Without dead ends: 159 [2022-11-19 08:21:06,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:21:06,110 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:06,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 564 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:21:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-19 08:21:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2022-11-19 08:21:06,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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) [2022-11-19 08:21:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2022-11-19 08:21:06,126 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2022-11-19 08:21:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:06,126 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2022-11-19 08:21:06,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2022-11-19 08:21:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2022-11-19 08:21:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 08:21:06,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:06,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:06,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:21:06,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:06,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1434286724, now seen corresponding path program 1 times [2022-11-19 08:21:06,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:06,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468389701] [2022-11-19 08:21:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:09,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:09,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468389701] [2022-11-19 08:21:09,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468389701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:09,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:21:09,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:21:09,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262838133] [2022-11-19 08:21:09,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:09,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:21:09,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:09,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:21:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:21:09,101 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2022-11-19 08:21:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:09,264 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2022-11-19 08:21:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:21:09,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2022-11-19 08:21:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:09,266 INFO L225 Difference]: With dead ends: 179 [2022-11-19 08:21:09,266 INFO L226 Difference]: Without dead ends: 159 [2022-11-19 08:21:09,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:21:09,267 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:09,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:21:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-19 08:21:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2022-11-19 08:21:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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) [2022-11-19 08:21:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2022-11-19 08:21:09,282 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2022-11-19 08:21:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:09,285 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2022-11-19 08:21:09,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2022-11-19 08:21:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2022-11-19 08:21:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:21:09,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:09,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:09,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:21:09,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1519932357, now seen corresponding path program 1 times [2022-11-19 08:21:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:09,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122523944] [2022-11-19 08:21:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:09,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:09,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122523944] [2022-11-19 08:21:09,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122523944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:09,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:21:09,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:21:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312499728] [2022-11-19 08:21:09,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:21:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:21:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:21:09,715 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2022-11-19 08:21:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:09,998 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2022-11-19 08:21:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:21:09,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 64 [2022-11-19 08:21:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:10,000 INFO L225 Difference]: With dead ends: 201 [2022-11-19 08:21:10,000 INFO L226 Difference]: Without dead ends: 181 [2022-11-19 08:21:10,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:21:10,001 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 45 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:10,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 776 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:21:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-19 08:21:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2022-11-19 08:21:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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) [2022-11-19 08:21:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2022-11-19 08:21:10,014 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2022-11-19 08:21:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:10,014 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2022-11-19 08:21:10,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2022-11-19 08:21:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2022-11-19 08:21:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:21:10,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:10,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:10,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:21:10,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash 82304540, now seen corresponding path program 1 times [2022-11-19 08:21:10,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:10,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186563610] [2022-11-19 08:21:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:10,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:21:16,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186563610] [2022-11-19 08:21:16,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186563610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:21:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133881139] [2022-11-19 08:21:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:16,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:16,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:16,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1bcfef1-4a2d-4f43-8984-38e7892af2b9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:21:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:17,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:21:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:22:24,614 INFO L328 TraceCheckSpWp]: Computing backward predicates...