./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.06.cil.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_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/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_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.06.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/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_0b014f60-e324-436d-a524-520d0c016335/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 bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df --- 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 07:31:36,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:31:36,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:31:36,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:31:36,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:31:36,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:31:36,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:31:36,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:31:36,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:31:36,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:31:36,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:31:36,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:31:36,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:31:36,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:31:36,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:31:36,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:31:36,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:31:36,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:31:36,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:31:36,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:31:36,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:31:36,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:31:36,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:31:36,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:31:36,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:31:36,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:31:36,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:31:36,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:31:36,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:31:36,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:31:36,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:31:36,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:31:36,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:31:36,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:31:36,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:31:36,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:31:36,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:31:36,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:31:36,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:31:36,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:31:36,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:31:36,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:31:36,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:31:36,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:31:36,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:31:36,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:31:36,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:31:36,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:31:36,572 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:31:36,573 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:31:36,573 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:31:36,573 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:31:36,574 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:31:36,575 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:31:36,575 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:31:36,575 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:31:36,576 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:31:36,576 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:31:36,576 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:31:36,576 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:31:36,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:31:36,578 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:31:36,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:31:36,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:31:36,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:31:36,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:31:36,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:31:36,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:31:36,581 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:31:36,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:31:36,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:31:36,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:31:36,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:31:36,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:31:36,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:31:36,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:31:36,584 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:31:36,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:31:36,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:31:36,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:31:36,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:31:36,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:31:36,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:31:36,586 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_0b014f60-e324-436d-a524-520d0c016335/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbfdf3f22061e77485b28b33d06a9820d2c4b7aa22afc378a1743c2d746b69df [2022-11-19 07:31:36,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:31:36,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:31:36,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:31:36,948 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:31:36,951 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:31:36,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/systemc/transmitter.06.cil.c [2022-11-19 07:31:37,050 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/data/e2378df34/a3a9bec9686b4574bdae7e207be7e308/FLAG1db90f534 [2022-11-19 07:31:37,723 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:31:37,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/sv-benchmarks/c/systemc/transmitter.06.cil.c [2022-11-19 07:31:37,753 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/data/e2378df34/a3a9bec9686b4574bdae7e207be7e308/FLAG1db90f534 [2022-11-19 07:31:37,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/data/e2378df34/a3a9bec9686b4574bdae7e207be7e308 [2022-11-19 07:31:38,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:31:38,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:31:38,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:31:38,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:31:38,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:31:38,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622d68ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38, skipping insertion in model container [2022-11-19 07:31:38,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:31:38,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:31:38,360 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_0b014f60-e324-436d-a524-520d0c016335/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2022-11-19 07:31:38,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:31:38,516 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:31:38,530 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_0b014f60-e324-436d-a524-520d0c016335/sv-benchmarks/c/systemc/transmitter.06.cil.c[706,719] [2022-11-19 07:31:38,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:31:38,603 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:31:38,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38 WrapperNode [2022-11-19 07:31:38,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:31:38,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:31:38,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:31:38,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:31:38,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,669 INFO L138 Inliner]: procedures = 40, calls = 48, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 492 [2022-11-19 07:31:38,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:31:38,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:31:38,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:31:38,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:31:38,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,708 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:31:38,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:31:38,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:31:38,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:31:38,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (1/1) ... [2022-11-19 07:31:38,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:31:38,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:38,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:31:38,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b014f60-e324-436d-a524-520d0c016335/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:31:38,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:31:38,843 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:31:38,843 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:31:38,843 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:31:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:31:38,844 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:31:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:31:38,844 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:31:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:31:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:31:38,845 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:31:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:31:38,845 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:31:38,846 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:31:38,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:31:38,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:31:38,999 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:31:39,001 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:31:39,779 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:31:40,169 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:31:40,170 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-19 07:31:40,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:31:40 BoogieIcfgContainer [2022-11-19 07:31:40,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:31:40,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:31:40,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:31:40,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:31:40,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:31:38" (1/3) ... [2022-11-19 07:31:40,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7718fa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:31:40, skipping insertion in model container [2022-11-19 07:31:40,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:38" (2/3) ... [2022-11-19 07:31:40,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7718fa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:31:40, skipping insertion in model container [2022-11-19 07:31:40,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:31:40" (3/3) ... [2022-11-19 07:31:40,186 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.06.cil.c [2022-11-19 07:31:40,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:31:40,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:31:40,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:31:40,310 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;@446ac5cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:31:40,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:31:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 120 states, 93 states have (on average 1.5376344086021505) internal successors, (143), 95 states have internal predecessors, (143), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-19 07:31:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:31:40,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:40,329 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] [2022-11-19 07:31:40,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 826952206, now seen corresponding path program 1 times [2022-11-19 07:31:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:40,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103012949] [2022-11-19 07:31:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:40,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:40,993 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 07:31:40,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103012949] [2022-11-19 07:31:40,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103012949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:40,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:40,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:31:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751401529] [2022-11-19 07:31:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:41,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:31:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:41,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:31:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:31:41,050 INFO L87 Difference]: Start difference. First operand has 120 states, 93 states have (on average 1.5376344086021505) internal successors, (143), 95 states have internal predecessors, (143), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:41,471 INFO L93 Difference]: Finished difference Result 343 states and 533 transitions. [2022-11-19 07:31:41,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:31:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-11-19 07:31:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:41,486 INFO L225 Difference]: With dead ends: 343 [2022-11-19 07:31:41,487 INFO L226 Difference]: Without dead ends: 224 [2022-11-19 07:31:41,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:31:41,497 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 301 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:41,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 462 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:31:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-19 07:31:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2022-11-19 07:31:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 175 states have (on average 1.4628571428571429) internal successors, (256), 176 states have internal predecessors, (256), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-19 07:31:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 322 transitions. [2022-11-19 07:31:41,574 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 322 transitions. Word has length 53 [2022-11-19 07:31:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:41,575 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 322 transitions. [2022-11-19 07:31:41,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 322 transitions. [2022-11-19 07:31:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:31:41,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:41,579 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] [2022-11-19 07:31:41,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:31:41,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:41,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1569484785, now seen corresponding path program 1 times [2022-11-19 07:31:41,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:41,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350703994] [2022-11-19 07:31:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:41,888 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 07:31:41,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350703994] [2022-11-19 07:31:41,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350703994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:41,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:41,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:31:41,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211031055] [2022-11-19 07:31:41,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:41,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:31:41,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:41,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:31:41,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:31:41,897 INFO L87 Difference]: Start difference. First operand 221 states and 322 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:42,724 INFO L93 Difference]: Finished difference Result 748 states and 1099 transitions. [2022-11-19 07:31:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:31:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-11-19 07:31:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:42,732 INFO L225 Difference]: With dead ends: 748 [2022-11-19 07:31:42,732 INFO L226 Difference]: Without dead ends: 512 [2022-11-19 07:31:42,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:31:42,736 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 604 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:42,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 739 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:31:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-19 07:31:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 500. [2022-11-19 07:31:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 407 states have (on average 1.457002457002457) internal successors, (593), 403 states have internal predecessors, (593), 64 states have call successors, (64), 26 states have call predecessors, (64), 28 states have return successors, (71), 71 states have call predecessors, (71), 64 states have call successors, (71) [2022-11-19 07:31:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 728 transitions. [2022-11-19 07:31:42,806 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 728 transitions. Word has length 53 [2022-11-19 07:31:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:42,807 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 728 transitions. [2022-11-19 07:31:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 728 transitions. [2022-11-19 07:31:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:31:42,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:42,810 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] [2022-11-19 07:31:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:31:42,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -444224816, now seen corresponding path program 1 times [2022-11-19 07:31:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:42,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278707142] [2022-11-19 07:31:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:42,988 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 07:31:42,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278707142] [2022-11-19 07:31:42,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278707142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:42,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:42,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:31:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077504988] [2022-11-19 07:31:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:42,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:31:42,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:42,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:31:42,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:31:42,992 INFO L87 Difference]: Start difference. First operand 500 states and 728 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:43,630 INFO L93 Difference]: Finished difference Result 1731 states and 2549 transitions. [2022-11-19 07:31:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:31:43,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-11-19 07:31:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:43,639 INFO L225 Difference]: With dead ends: 1731 [2022-11-19 07:31:43,640 INFO L226 Difference]: Without dead ends: 1199 [2022-11-19 07:31:43,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:31:43,644 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 604 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:43,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 606 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:31:43,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-11-19 07:31:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 939. [2022-11-19 07:31:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 766 states have (on average 1.4556135770234986) internal successors, (1115), 763 states have internal predecessors, (1115), 116 states have call successors, (116), 50 states have call predecessors, (116), 56 states have return successors, (136), 126 states have call predecessors, (136), 116 states have call successors, (136) [2022-11-19 07:31:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1367 transitions. [2022-11-19 07:31:43,783 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1367 transitions. Word has length 53 [2022-11-19 07:31:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:43,783 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1367 transitions. [2022-11-19 07:31:43,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1367 transitions. [2022-11-19 07:31:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:31:43,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:43,786 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] [2022-11-19 07:31:43,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:31:43,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2072875089, now seen corresponding path program 1 times [2022-11-19 07:31:43,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:43,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087999781] [2022-11-19 07:31:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:43,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:43,990 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 07:31:43,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:43,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087999781] [2022-11-19 07:31:43,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087999781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:43,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:43,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:31:43,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251944160] [2022-11-19 07:31:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:43,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:31:43,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:31:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:31:43,994 INFO L87 Difference]: Start difference. First operand 939 states and 1367 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:44,807 INFO L93 Difference]: Finished difference Result 3186 states and 4702 transitions. [2022-11-19 07:31:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:31:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-11-19 07:31:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:44,827 INFO L225 Difference]: With dead ends: 3186 [2022-11-19 07:31:44,828 INFO L226 Difference]: Without dead ends: 2182 [2022-11-19 07:31:44,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:31:44,845 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 604 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:44,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 606 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:31:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2022-11-19 07:31:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1791. [2022-11-19 07:31:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1462 states have (on average 1.4521203830369358) internal successors, (2123), 1463 states have internal predecessors, (2123), 216 states have call successors, (216), 98 states have call predecessors, (216), 112 states have return successors, (260), 230 states have call predecessors, (260), 216 states have call successors, (260) [2022-11-19 07:31:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2599 transitions. [2022-11-19 07:31:45,111 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2599 transitions. Word has length 53 [2022-11-19 07:31:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:45,112 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2599 transitions. [2022-11-19 07:31:45,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2599 transitions. [2022-11-19 07:31:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:31:45,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:45,114 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] [2022-11-19 07:31:45,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:31:45,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:45,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1913653198, now seen corresponding path program 1 times [2022-11-19 07:31:45,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:45,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716971351] [2022-11-19 07:31:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:45,476 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 07:31:45,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:45,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716971351] [2022-11-19 07:31:45,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716971351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:45,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:45,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:31:45,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912111754] [2022-11-19 07:31:45,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:31:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:31:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:31:45,485 INFO L87 Difference]: Start difference. First operand 1791 states and 2599 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:46,309 INFO L93 Difference]: Finished difference Result 5440 states and 7938 transitions. [2022-11-19 07:31:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:31:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2022-11-19 07:31:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:46,339 INFO L225 Difference]: With dead ends: 5440 [2022-11-19 07:31:46,340 INFO L226 Difference]: Without dead ends: 3655 [2022-11-19 07:31:46,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:31:46,362 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 566 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:46,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 512 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:31:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2022-11-19 07:31:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2991. [2022-11-19 07:31:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2470 states have (on average 1.4392712550607287) internal successors, (3555), 2471 states have internal predecessors, (3555), 328 states have call successors, (328), 164 states have call predecessors, (328), 192 states have return successors, (416), 356 states have call predecessors, (416), 328 states have call successors, (416) [2022-11-19 07:31:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4299 transitions. [2022-11-19 07:31:46,725 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4299 transitions. Word has length 53 [2022-11-19 07:31:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:46,726 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4299 transitions. [2022-11-19 07:31:46,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4299 transitions. [2022-11-19 07:31:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:31:46,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:46,728 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 07:31:46,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:31:46,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash -195505164, now seen corresponding path program 1 times [2022-11-19 07:31:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:46,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583617369] [2022-11-19 07:31:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:46,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:47,046 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 07:31:47,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:47,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583617369] [2022-11-19 07:31:47,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583617369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:47,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:47,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:31:47,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584841258] [2022-11-19 07:31:47,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:47,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:31:47,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:31:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:31:47,052 INFO L87 Difference]: Start difference. First operand 2991 states and 4299 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:48,213 INFO L93 Difference]: Finished difference Result 10691 states and 15446 transitions. [2022-11-19 07:31:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:31:48,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-11-19 07:31:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:48,285 INFO L225 Difference]: With dead ends: 10691 [2022-11-19 07:31:48,286 INFO L226 Difference]: Without dead ends: 7706 [2022-11-19 07:31:48,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:31:48,302 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 612 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:48,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 389 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:31:48,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2022-11-19 07:31:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 5820. [2022-11-19 07:31:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5820 states, 4807 states have (on average 1.4302059496567505) internal successors, (6875), 4810 states have internal predecessors, (6875), 628 states have call successors, (628), 328 states have call predecessors, (628), 384 states have return successors, (790), 682 states have call predecessors, (790), 628 states have call successors, (790) [2022-11-19 07:31:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5820 states to 5820 states and 8293 transitions. [2022-11-19 07:31:49,178 INFO L78 Accepts]: Start accepts. Automaton has 5820 states and 8293 transitions. Word has length 54 [2022-11-19 07:31:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:49,179 INFO L495 AbstractCegarLoop]: Abstraction has 5820 states and 8293 transitions. [2022-11-19 07:31:49,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5820 states and 8293 transitions. [2022-11-19 07:31:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:31:49,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:49,183 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 07:31:49,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:31:49,185 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2029129317, now seen corresponding path program 1 times [2022-11-19 07:31:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:49,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773320362] [2022-11-19 07:31:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:49,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:49,515 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 07:31:49,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:49,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773320362] [2022-11-19 07:31:49,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773320362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:49,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:49,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:31:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026142573] [2022-11-19 07:31:49,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:49,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:31:49,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:31:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:31:49,519 INFO L87 Difference]: Start difference. First operand 5820 states and 8293 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:51,090 INFO L93 Difference]: Finished difference Result 16236 states and 23285 transitions. [2022-11-19 07:31:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:31:51,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-11-19 07:31:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:51,164 INFO L225 Difference]: With dead ends: 16236 [2022-11-19 07:31:51,165 INFO L226 Difference]: Without dead ends: 10422 [2022-11-19 07:31:51,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:31:51,188 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 529 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:51,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 420 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:31:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10422 states. [2022-11-19 07:31:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10422 to 8636. [2022-11-19 07:31:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8636 states, 7123 states have (on average 1.4217324161168048) internal successors, (10127), 7116 states have internal predecessors, (10127), 936 states have call successors, (936), 496 states have call predecessors, (936), 576 states have return successors, (1160), 1024 states have call predecessors, (1160), 936 states have call successors, (1160) [2022-11-19 07:31:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 12223 transitions. [2022-11-19 07:31:52,579 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 12223 transitions. Word has length 55 [2022-11-19 07:31:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:52,583 INFO L495 AbstractCegarLoop]: Abstraction has 8636 states and 12223 transitions. [2022-11-19 07:31:52,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:52,585 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 12223 transitions. [2022-11-19 07:31:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:31:52,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:52,586 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 07:31:52,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:31:52,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1834519152, now seen corresponding path program 1 times [2022-11-19 07:31:52,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:52,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512936115] [2022-11-19 07:31:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:52,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:52,845 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 07:31:52,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:52,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512936115] [2022-11-19 07:31:52,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512936115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:52,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:52,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:31:52,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526407763] [2022-11-19 07:31:52,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:52,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:31:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:31:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:31:52,852 INFO L87 Difference]: Start difference. First operand 8636 states and 12223 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:54,991 INFO L93 Difference]: Finished difference Result 23610 states and 33653 transitions. [2022-11-19 07:31:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:31:54,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-11-19 07:31:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:55,107 INFO L225 Difference]: With dead ends: 23610 [2022-11-19 07:31:55,107 INFO L226 Difference]: Without dead ends: 14980 [2022-11-19 07:31:55,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:31:55,139 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 488 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:55,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 497 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:31:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14980 states. [2022-11-19 07:31:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14980 to 12866. [2022-11-19 07:31:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12866 states, 10601 states have (on average 1.4129799075558909) internal successors, (14979), 10574 states have internal predecessors, (14979), 1400 states have call successors, (1400), 752 states have call predecessors, (1400), 864 states have return successors, (1704), 1540 states have call predecessors, (1704), 1400 states have call successors, (1704) [2022-11-19 07:31:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 18083 transitions. [2022-11-19 07:31:57,235 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 18083 transitions. Word has length 56 [2022-11-19 07:31:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:57,235 INFO L495 AbstractCegarLoop]: Abstraction has 12866 states and 18083 transitions. [2022-11-19 07:31:57,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:31:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 18083 transitions. [2022-11-19 07:31:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:31:57,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:57,238 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 07:31:57,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:31:57,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash -926859063, now seen corresponding path program 1 times [2022-11-19 07:31:57,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:57,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889788353] [2022-11-19 07:31:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:57,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:57,658 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 07:31:57,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:57,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889788353] [2022-11-19 07:31:57,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889788353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:57,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:57,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:31:57,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740953566] [2022-11-19 07:31:57,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:57,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:31:57,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:31:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:31:57,663 INFO L87 Difference]: Start difference. First operand 12866 states and 18083 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:32:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:01,092 INFO L93 Difference]: Finished difference Result 41998 states and 59370 transitions. [2022-11-19 07:32:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:32:01,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-11-19 07:32:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:01,243 INFO L225 Difference]: With dead ends: 41998 [2022-11-19 07:32:01,243 INFO L226 Difference]: Without dead ends: 29138 [2022-11-19 07:32:01,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:32:01,285 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 502 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:01,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 376 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:32:01,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29138 states. [2022-11-19 07:32:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29138 to 24944. [2022-11-19 07:32:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24944 states, 20559 states have (on average 1.402548762099324) internal successors, (28835), 20520 states have internal predecessors, (28835), 2676 states have call successors, (2676), 1492 states have call predecessors, (2676), 1708 states have return successors, (3220), 2932 states have call predecessors, (3220), 2676 states have call successors, (3220) [2022-11-19 07:32:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24944 states to 24944 states and 34731 transitions. [2022-11-19 07:32:04,771 INFO L78 Accepts]: Start accepts. Automaton has 24944 states and 34731 transitions. Word has length 57 [2022-11-19 07:32:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:04,771 INFO L495 AbstractCegarLoop]: Abstraction has 24944 states and 34731 transitions. [2022-11-19 07:32:04,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:32:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24944 states and 34731 transitions. [2022-11-19 07:32:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:32:04,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:04,774 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 07:32:04,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:32:04,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:04,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1870733524, now seen corresponding path program 1 times [2022-11-19 07:32:04,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:04,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642747962] [2022-11-19 07:32:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:04,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:05,009 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 07:32:05,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:05,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642747962] [2022-11-19 07:32:05,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642747962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:05,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:05,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:32:05,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081216871] [2022-11-19 07:32:05,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:05,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:32:05,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:32:05,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:32:05,012 INFO L87 Difference]: Start difference. First operand 24944 states and 34731 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:32:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:09,681 INFO L93 Difference]: Finished difference Result 65216 states and 91339 transitions. [2022-11-19 07:32:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:32:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2022-11-19 07:32:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:09,878 INFO L225 Difference]: With dead ends: 65216 [2022-11-19 07:32:09,878 INFO L226 Difference]: Without dead ends: 40278 [2022-11-19 07:32:09,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:32:09,949 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 460 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:09,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 390 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:32:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40278 states. [2022-11-19 07:32:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40278 to 37268. [2022-11-19 07:32:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37268 states, 30729 states have (on average 1.3940251879332226) internal successors, (42837), 30642 states have internal predecessors, (42837), 3992 states have call successors, (3992), 2256 states have call predecessors, (3992), 2546 states have return successors, (4706), 4370 states have call predecessors, (4706), 3992 states have call successors, (4706) [2022-11-19 07:32:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37268 states to 37268 states and 51535 transitions. [2022-11-19 07:32:14,487 INFO L78 Accepts]: Start accepts. Automaton has 37268 states and 51535 transitions. Word has length 58 [2022-11-19 07:32:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:14,488 INFO L495 AbstractCegarLoop]: Abstraction has 37268 states and 51535 transitions. [2022-11-19 07:32:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:32:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 37268 states and 51535 transitions. [2022-11-19 07:32:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 07:32:14,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:14,490 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] [2022-11-19 07:32:14,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:32:14,491 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1727083731, now seen corresponding path program 1 times [2022-11-19 07:32:14,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:14,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035996884] [2022-11-19 07:32:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:14,559 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 07:32:14,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035996884] [2022-11-19 07:32:14,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035996884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:14,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:14,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:32:14,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140839712] [2022-11-19 07:32:14,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:14,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:32:14,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:32:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:32:14,563 INFO L87 Difference]: Start difference. First operand 37268 states and 51535 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 07:32:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:22,474 INFO L93 Difference]: Finished difference Result 110819 states and 155169 transitions. [2022-11-19 07:32:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:32:22,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2022-11-19 07:32:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:23,130 INFO L225 Difference]: With dead ends: 110819 [2022-11-19 07:32:23,131 INFO L226 Difference]: Without dead ends: 73556 [2022-11-19 07:32:23,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:32:23,278 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:23,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 286 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:32:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73556 states. [2022-11-19 07:32:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73556 to 73168. [2022-11-19 07:32:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73168 states, 60095 states have (on average 1.370613195773359) internal successors, (82367), 59920 states have internal predecessors, (82367), 7980 states have call successors, (7980), 4512 states have call predecessors, (7980), 5092 states have return successors, (9408), 8736 states have call predecessors, (9408), 7980 states have call successors, (9408)