./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/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_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/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_4a2dcefb-1afd-4edc-900b-fd1075af30a7/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 ebeacfd453f434fdf714d7b079047e83de79a1e641783287d3b5f33f6eefdc0e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:32:50,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:32:50,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:32:50,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:32:50,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:32:50,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:32:50,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:32:50,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:32:50,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:32:50,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:32:50,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:32:50,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:32:50,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:32:50,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:32:50,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:32:50,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:32:50,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:32:50,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:32:50,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:32:50,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:32:50,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:32:50,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:32:50,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:32:50,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:32:50,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:32:50,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:32:50,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:32:50,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:32:50,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:32:50,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:32:50,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:32:50,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:32:50,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:32:50,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:32:50,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:32:50,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:32:50,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:32:50,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:32:50,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:32:50,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:32:50,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:32:50,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:32:50,670 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:32:50,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:32:50,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:32:50,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:32:50,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:32:50,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:32:50,672 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:32:50,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:32:50,673 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:32:50,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:32:50,674 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:32:50,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:32:50,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:32:50,674 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:32:50,675 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:32:50,675 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:32:50,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:32:50,675 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:32:50,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:32:50,676 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:32:50,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:32:50,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:32:50,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:32:50,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:32:50,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:32:50,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:32:50,679 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:32:50,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:32:50,679 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:32:50,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:32:50,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:32:50,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:32:50,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:32:50,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:32:50,680 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:32:50,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:32:50,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:32:50,681 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:32:50,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:32:50,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:32:50,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:32:50,681 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_4a2dcefb-1afd-4edc-900b-fd1075af30a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebeacfd453f434fdf714d7b079047e83de79a1e641783287d3b5f33f6eefdc0e [2022-11-19 08:32:50,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:32:51,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:32:51,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:32:51,007 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:32:51,008 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:32:51,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c [2022-11-19 08:32:51,090 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/data/c12ad09a9/f84924074374412e9654edd8ebdca58c/FLAGb6380dd84 [2022-11-19 08:32:52,171 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:32:52,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c [2022-11-19 08:32:52,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/data/c12ad09a9/f84924074374412e9654edd8ebdca58c/FLAGb6380dd84 [2022-11-19 08:32:52,427 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/data/c12ad09a9/f84924074374412e9654edd8ebdca58c [2022-11-19 08:32:52,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:32:52,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:32:52,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:32:52,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:32:52,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:32:52,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:32:52" (1/1) ... [2022-11-19 08:32:52,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e804a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:52, skipping insertion in model container [2022-11-19 08:32:52,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:32:52" (1/1) ... [2022-11-19 08:32:52,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:32:52,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:32:55,216 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_4a2dcefb-1afd-4edc-900b-fd1075af30a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c[380323,380336] [2022-11-19 08:32:55,245 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_4a2dcefb-1afd-4edc-900b-fd1075af30a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c[383339,383352] [2022-11-19 08:32:55,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:32:55,602 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:32:56,919 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_4a2dcefb-1afd-4edc-900b-fd1075af30a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c[380323,380336] [2022-11-19 08:32:56,924 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_4a2dcefb-1afd-4edc-900b-fd1075af30a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c[383339,383352] [2022-11-19 08:32:56,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:32:57,019 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:32:57,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57 WrapperNode [2022-11-19 08:32:57,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:32:57,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:32:57,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:32:57,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:32:57,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,418 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13088 [2022-11-19 08:32:57,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:32:57,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:32:57,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:32:57,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:32:57,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,974 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:57,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:58,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:32:58,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:32:58,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:32:58,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:32:58,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (1/1) ... [2022-11-19 08:32:58,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:32:58,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:58,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:32:58,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:32:58,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:32:58,184 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 08:32:58,185 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 08:32:58,185 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:32:58,185 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:32:58,185 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 08:32:58,185 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 08:32:58,185 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-19 08:32:58,185 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-19 08:32:58,186 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 08:32:58,186 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 08:32:58,186 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 08:32:58,186 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 08:32:58,186 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 08:32:58,186 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 08:32:58,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:32:58,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:32:58,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:32:58,358 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:32:58,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:33:08,110 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:33:10,727 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:33:10,727 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-19 08:33:10,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:33:10 BoogieIcfgContainer [2022-11-19 08:33:10,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:33:10,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:33:10,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:33:10,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:33:10,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:32:52" (1/3) ... [2022-11-19 08:33:10,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dd9c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:33:10, skipping insertion in model container [2022-11-19 08:33:10,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:32:57" (2/3) ... [2022-11-19 08:33:10,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dd9c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:33:10, skipping insertion in model container [2022-11-19 08:33:10,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:33:10" (3/3) ... [2022-11-19 08:33:10,742 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.10.cil-1.c [2022-11-19 08:33:10,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:33:10,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:33:10,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:33:10,875 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;@69930522, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:33:10,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:33:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-19 08:33:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 08:33:10,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:10,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:10,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:10,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1359654342, now seen corresponding path program 1 times [2022-11-19 08:33:10,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:10,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986120075] [2022-11-19 08:33:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:10,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:33:11,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986120075] [2022-11-19 08:33:11,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986120075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:11,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:11,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:33:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202304521] [2022-11-19 08:33:11,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:11,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:33:11,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:11,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:33:11,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:33:11,571 INFO L87 Difference]: Start difference. First operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:33:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:12,762 INFO L93 Difference]: Finished difference Result 3778 states and 7335 transitions. [2022-11-19 08:33:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:33:12,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-11-19 08:33:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:12,795 INFO L225 Difference]: With dead ends: 3778 [2022-11-19 08:33:12,796 INFO L226 Difference]: Without dead ends: 1962 [2022-11-19 08:33:12,806 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 08:33:12,813 INFO L413 NwaCegarLoop]: 3458 mSDtfsCounter, 3721 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3721 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:12,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3721 Valid, 6824 Invalid, 712 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:33:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-11-19 08:33:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1961. [2022-11-19 08:33:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1901 states have (on average 1.9263545502367174) internal successors, (3662), 1905 states have internal predecessors, (3662), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-19 08:33:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3752 transitions. [2022-11-19 08:33:12,971 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3752 transitions. Word has length 62 [2022-11-19 08:33:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:12,972 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 3752 transitions. [2022-11-19 08:33:12,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:33:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3752 transitions. [2022-11-19 08:33:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 08:33:12,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:12,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:33:12,980 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:12,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2084202690, now seen corresponding path program 1 times [2022-11-19 08:33:12,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:12,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891879537] [2022-11-19 08:33:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:12,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:33:13,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:13,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891879537] [2022-11-19 08:33:13,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891879537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:13,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525883282] [2022-11-19 08:33:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:13,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:13,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:13,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:13,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:33:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:13,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:33:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:33:13,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:13,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525883282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:13,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:33:13,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:33:13,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222525438] [2022-11-19 08:33:13,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:13,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:13,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:13,822 INFO L87 Difference]: Start difference. First operand 1961 states and 3752 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:14,392 INFO L93 Difference]: Finished difference Result 2584 states and 4719 transitions. [2022-11-19 08:33:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 08:33:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:14,409 INFO L225 Difference]: With dead ends: 2584 [2022-11-19 08:33:14,409 INFO L226 Difference]: Without dead ends: 2269 [2022-11-19 08:33:14,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:14,414 INFO L413 NwaCegarLoop]: 3323 mSDtfsCounter, 3479 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:14,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3479 Valid, 3525 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:33:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-11-19 08:33:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2263. [2022-11-19 08:33:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2153 states have (on average 1.8769159312587087) internal successors, (4041), 2158 states have internal predecessors, (4041), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-19 08:33:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4207 transitions. [2022-11-19 08:33:14,503 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4207 transitions. Word has length 123 [2022-11-19 08:33:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:14,504 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 4207 transitions. [2022-11-19 08:33:14,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4207 transitions. [2022-11-19 08:33:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 08:33:14,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:14,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:14,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:14,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:14,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash -761634206, now seen corresponding path program 1 times [2022-11-19 08:33:14,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:14,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8593470] [2022-11-19 08:33:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:14,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:33:14,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:14,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8593470] [2022-11-19 08:33:14,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8593470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:14,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035715349] [2022-11-19 08:33:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:14,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:14,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:33:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:33:15,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 08:33:15,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:15,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035715349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:15,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:33:15,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:33:15,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040626807] [2022-11-19 08:33:15,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:15,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:15,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:15,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:15,246 INFO L87 Difference]: Start difference. First operand 2263 states and 4207 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:15,852 INFO L93 Difference]: Finished difference Result 3484 states and 6098 transitions. [2022-11-19 08:33:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 08:33:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:15,873 INFO L225 Difference]: With dead ends: 3484 [2022-11-19 08:33:15,873 INFO L226 Difference]: Without dead ends: 2867 [2022-11-19 08:33:15,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:15,883 INFO L413 NwaCegarLoop]: 3322 mSDtfsCounter, 3497 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3524 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:15,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3524 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:33:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2022-11-19 08:33:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2859. [2022-11-19 08:33:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2651 states have (on average 1.8057336854017352) internal successors, (4787), 2658 states have internal predecessors, (4787), 158 states have call successors, (158), 49 states have call predecessors, (158), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-19 08:33:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 5101 transitions. [2022-11-19 08:33:16,033 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 5101 transitions. Word has length 123 [2022-11-19 08:33:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:16,034 INFO L495 AbstractCegarLoop]: Abstraction has 2859 states and 5101 transitions. [2022-11-19 08:33:16,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 5101 transitions. [2022-11-19 08:33:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 08:33:16,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:16,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:16,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:16,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:16,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:16,257 INFO L85 PathProgramCache]: Analyzing trace with hash 852177922, now seen corresponding path program 1 times [2022-11-19 08:33:16,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:16,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530014549] [2022-11-19 08:33:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:16,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:33:16,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:16,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530014549] [2022-11-19 08:33:16,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530014549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466604712] [2022-11-19 08:33:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:16,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:16,483 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:16,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:33:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:16,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:33:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:33:16,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:16,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466604712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:16,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:33:16,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:33:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732253410] [2022-11-19 08:33:16,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:16,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:16,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:16,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:16,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:16,818 INFO L87 Difference]: Start difference. First operand 2859 states and 5101 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:17,435 INFO L93 Difference]: Finished difference Result 5260 states and 8806 transitions. [2022-11-19 08:33:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 08:33:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:17,459 INFO L225 Difference]: With dead ends: 5260 [2022-11-19 08:33:17,460 INFO L226 Difference]: Without dead ends: 4047 [2022-11-19 08:33:17,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:17,468 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3491 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:17,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:33:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2022-11-19 08:33:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 4035. [2022-11-19 08:33:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 3635 states have (on average 1.7207702888583218) internal successors, (6255), 3646 states have internal predecessors, (6255), 302 states have call successors, (302), 97 states have call predecessors, (302), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-19 08:33:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6857 transitions. [2022-11-19 08:33:17,689 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6857 transitions. Word has length 123 [2022-11-19 08:33:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:17,690 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 6857 transitions. [2022-11-19 08:33:17,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6857 transitions. [2022-11-19 08:33:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 08:33:17,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:17,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:17,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:17,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-19 08:33:17,905 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1977728418, now seen corresponding path program 1 times [2022-11-19 08:33:17,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:17,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765164235] [2022-11-19 08:33:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:17,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:33:18,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:18,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765164235] [2022-11-19 08:33:18,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765164235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:18,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320829871] [2022-11-19 08:33:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:18,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:18,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:18,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:33:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:18,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:33:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 08:33:18,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:18,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320829871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:18,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:33:18,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:33:18,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168754143] [2022-11-19 08:33:18,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:18,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:18,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:18,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:18,533 INFO L87 Difference]: Start difference. First operand 4035 states and 6857 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:19,366 INFO L93 Difference]: Finished difference Result 8764 states and 14122 transitions. [2022-11-19 08:33:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 08:33:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:19,403 INFO L225 Difference]: With dead ends: 8764 [2022-11-19 08:33:19,404 INFO L226 Difference]: Without dead ends: 6375 [2022-11-19 08:33:19,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:19,418 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3500 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:19,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3500 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:33:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2022-11-19 08:33:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6355. [2022-11-19 08:33:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 5579 states have (on average 1.6388241620362072) internal successors, (9143), 5598 states have internal predecessors, (9143), 582 states have call successors, (582), 193 states have call predecessors, (582), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-11-19 08:33:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 10305 transitions. [2022-11-19 08:33:19,833 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 10305 transitions. Word has length 123 [2022-11-19 08:33:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:19,834 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 10305 transitions. [2022-11-19 08:33:19,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 10305 transitions. [2022-11-19 08:33:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 08:33:19,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:19,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:19,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:20,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:20,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1190922242, now seen corresponding path program 1 times [2022-11-19 08:33:20,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:20,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343249600] [2022-11-19 08:33:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:20,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:33:20,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343249600] [2022-11-19 08:33:20,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343249600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:20,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604797066] [2022-11-19 08:33:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:20,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:20,258 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:20,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:33:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:20,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:33:20,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:33:20,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:20,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604797066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:20,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:33:20,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:33:20,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439302741] [2022-11-19 08:33:20,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:20,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:20,569 INFO L87 Difference]: Start difference. First operand 6355 states and 10305 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:21,590 INFO L93 Difference]: Finished difference Result 15676 states and 24554 transitions. [2022-11-19 08:33:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-19 08:33:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:21,679 INFO L225 Difference]: With dead ends: 15676 [2022-11-19 08:33:21,680 INFO L226 Difference]: Without dead ends: 10967 [2022-11-19 08:33:21,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:21,707 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3485 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3485 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:21,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3485 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:33:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2022-11-19 08:33:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 10931. [2022-11-19 08:33:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10931 states, 9419 states have (on average 1.5737339420320628) internal successors, (14823), 9454 states have internal predecessors, (14823), 1126 states have call successors, (1126), 385 states have call predecessors, (1126), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-11-19 08:33:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10931 states to 10931 states and 17073 transitions. [2022-11-19 08:33:22,572 INFO L78 Accepts]: Start accepts. Automaton has 10931 states and 17073 transitions. Word has length 123 [2022-11-19 08:33:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:22,573 INFO L495 AbstractCegarLoop]: Abstraction has 10931 states and 17073 transitions. [2022-11-19 08:33:22,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:33:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 10931 states and 17073 transitions. [2022-11-19 08:33:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 08:33:22,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:22,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:22,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:22,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2dcefb-1afd-4edc-900b-fd1075af30a7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:22,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash 430066082, now seen corresponding path program 1 times [2022-11-19 08:33:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591257043] [2022-11-19 08:33:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:33:23,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591257043] [2022-11-19 08:33:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591257043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:23,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:23,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:33:23,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954665286] [2022-11-19 08:33:23,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:23,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:33:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:23,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:33:23,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:23,428 INFO L87 Difference]: Start difference. First operand 10931 states and 17073 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:25,478 INFO L93 Difference]: Finished difference Result 25179 states and 38535 transitions. [2022-11-19 08:33:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:33:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-19 08:33:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:25,555 INFO L225 Difference]: With dead ends: 25179 [2022-11-19 08:33:25,556 INFO L226 Difference]: Without dead ends: 15895 [2022-11-19 08:33:25,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 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 08:33:25,580 INFO L413 NwaCegarLoop]: 3289 mSDtfsCounter, 3962 mSDsluCounter, 9674 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 12963 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:25,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3968 Valid, 12963 Invalid, 1336 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [135 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:33:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15895 states. [2022-11-19 08:33:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15895 to 15443. [2022-11-19 08:33:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15443 states, 13195 states have (on average 1.544145509662751) internal successors, (20375), 13246 states have internal predecessors, (20375), 1670 states have call successors, (1670), 577 states have call predecessors, (1670), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-11-19 08:33:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15443 states to 15443 states and 23713 transitions. [2022-11-19 08:33:26,405 INFO L78 Accepts]: Start accepts. Automaton has 15443 states and 23713 transitions. Word has length 123 [2022-11-19 08:33:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:26,406 INFO L495 AbstractCegarLoop]: Abstraction has 15443 states and 23713 transitions. [2022-11-19 08:33:26,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 15443 states and 23713 transitions. [2022-11-19 08:33:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:33:26,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:26,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:33:26,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1733745045, now seen corresponding path program 1 times [2022-11-19 08:33:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:26,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494705184] [2022-11-19 08:33:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:26,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:33:26,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:26,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494705184] [2022-11-19 08:33:26,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494705184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:26,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:26,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:33:26,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120089081] [2022-11-19 08:33:26,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:26,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:33:26,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:33:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:26,996 INFO L87 Difference]: Start difference. First operand 15443 states and 23713 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:30,298 INFO L93 Difference]: Finished difference Result 49499 states and 74312 transitions. [2022-11-19 08:33:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:33:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-11-19 08:33:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:30,492 INFO L225 Difference]: With dead ends: 49499 [2022-11-19 08:33:30,493 INFO L226 Difference]: Without dead ends: 35703 [2022-11-19 08:33:30,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 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 08:33:30,551 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 4182 mSDsluCounter, 9696 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4201 SdHoareTripleChecker+Valid, 12990 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:30,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4201 Valid, 12990 Invalid, 1341 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [133 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:33:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35703 states. [2022-11-19 08:33:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35703 to 28659. [2022-11-19 08:33:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28659 states, 24267 states have (on average 1.5088391642971937) internal successors, (36615), 24366 states have internal predecessors, (36615), 3238 states have call successors, (3238), 1153 states have call predecessors, (3238), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236) [2022-11-19 08:33:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28659 states to 28659 states and 43089 transitions. [2022-11-19 08:33:32,954 INFO L78 Accepts]: Start accepts. Automaton has 28659 states and 43089 transitions. Word has length 124 [2022-11-19 08:33:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:32,955 INFO L495 AbstractCegarLoop]: Abstraction has 28659 states and 43089 transitions. [2022-11-19 08:33:32,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 28659 states and 43089 transitions. [2022-11-19 08:33:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:33:33,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:33,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:33,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:33:33,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 595468482, now seen corresponding path program 1 times [2022-11-19 08:33:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128916871] [2022-11-19 08:33:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:33,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:33:33,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:33,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128916871] [2022-11-19 08:33:33,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128916871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:33,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:33,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:33:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8362830] [2022-11-19 08:33:33,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:33,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:33:33,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:33:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:33,810 INFO L87 Difference]: Start difference. First operand 28659 states and 43089 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:37,976 INFO L93 Difference]: Finished difference Result 74491 states and 111191 transitions. [2022-11-19 08:33:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:33:37,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-11-19 08:33:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:38,193 INFO L225 Difference]: With dead ends: 74491 [2022-11-19 08:33:38,193 INFO L226 Difference]: Without dead ends: 47479 [2022-11-19 08:33:38,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 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 08:33:38,255 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 4065 mSDsluCounter, 9754 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4071 SdHoareTripleChecker+Valid, 13032 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:38,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4071 Valid, 13032 Invalid, 1351 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:33:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47479 states. [2022-11-19 08:33:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47479 to 41779. [2022-11-19 08:33:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41779 states, 35243 states have (on average 1.492920579973328) internal successors, (52615), 35390 states have internal predecessors, (52615), 4806 states have call successors, (4806), 1729 states have call predecessors, (4806), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-11-19 08:33:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41779 states to 41779 states and 62225 transitions. [2022-11-19 08:33:41,372 INFO L78 Accepts]: Start accepts. Automaton has 41779 states and 62225 transitions. Word has length 125 [2022-11-19 08:33:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:41,373 INFO L495 AbstractCegarLoop]: Abstraction has 41779 states and 62225 transitions. [2022-11-19 08:33:41,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 41779 states and 62225 transitions. [2022-11-19 08:33:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:33:41,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:41,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:41,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:33:41,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1945055691, now seen corresponding path program 1 times [2022-11-19 08:33:41,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:41,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318897351] [2022-11-19 08:33:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:41,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:33:42,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318897351] [2022-11-19 08:33:42,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318897351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:42,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:42,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:33:42,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778970925] [2022-11-19 08:33:42,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:42,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:33:42,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:42,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:33:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:42,138 INFO L87 Difference]: Start difference. First operand 41779 states and 62225 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:49,261 INFO L93 Difference]: Finished difference Result 135099 states and 200472 transitions. [2022-11-19 08:33:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:33:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-11-19 08:33:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:49,815 INFO L225 Difference]: With dead ends: 135099 [2022-11-19 08:33:49,816 INFO L226 Difference]: Without dead ends: 94967 [2022-11-19 08:33:49,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 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 08:33:49,945 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 4151 mSDsluCounter, 6487 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4170 SdHoareTripleChecker+Valid, 9757 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:49,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4170 Valid, 9757 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:33:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94967 states. [2022-11-19 08:33:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94967 to 80179. [2022-11-19 08:33:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80179 states, 67403 states have (on average 1.4742222156283844) internal successors, (99367), 67694 states have internal predecessors, (99367), 9318 states have call successors, (9318), 3457 states have call predecessors, (9318), 3456 states have return successors, (9316), 9028 states have call predecessors, (9316), 9316 states have call successors, (9316) [2022-11-19 08:33:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80179 states to 80179 states and 118001 transitions. [2022-11-19 08:33:56,759 INFO L78 Accepts]: Start accepts. Automaton has 80179 states and 118001 transitions. Word has length 126 [2022-11-19 08:33:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:56,760 INFO L495 AbstractCegarLoop]: Abstraction has 80179 states and 118001 transitions. [2022-11-19 08:33:56,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:33:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 80179 states and 118001 transitions. [2022-11-19 08:33:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 08:33:56,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:56,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:56,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:33:56,862 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:56,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1126548642, now seen corresponding path program 1 times [2022-11-19 08:33:56,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:56,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101200892] [2022-11-19 08:33:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:56,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:33:57,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101200892] [2022-11-19 08:33:57,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101200892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:57,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:57,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:33:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185098603] [2022-11-19 08:33:57,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:57,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:33:57,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:57,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:33:57,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:57,724 INFO L87 Difference]: Start difference. First operand 80179 states and 118001 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)