./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh --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 e806b2de9400f1b211ac03466f80bb324cfea44da3c1d913127efd4a407821e8 --- 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-2329fc7 [2022-12-14 15:57:20,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:57:20,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:57:20,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:57:20,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:57:20,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:57:20,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:57:20,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:57:20,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:57:20,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:57:20,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:57:20,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:57:20,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:57:20,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:57:20,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:57:20,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:57:20,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:57:20,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:57:20,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:57:20,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:57:20,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:57:20,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:57:20,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:57:20,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:57:20,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:57:20,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:57:20,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:57:20,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:57:20,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:57:20,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:57:20,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:57:20,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:57:20,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:57:20,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:57:20,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:57:20,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:57:20,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:57:20,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:57:20,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:57:20,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:57:20,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:57:20,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:57:20,713 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:57:20,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:57:20,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:57:20,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:57:20,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:57:20,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:57:20,714 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:57:20,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:57:20,714 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:57:20,714 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:57:20,714 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:57:20,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:57:20,715 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:57:20,715 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:57:20,715 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:57:20,715 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:57:20,715 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:57:20,715 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:57:20,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:57:20,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:57:20,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:57:20,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:57:20,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:57:20,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:57:20,717 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:57:20,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:57:20,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:57:20,717 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:57:20,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:57:20,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:57:20,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:57:20,718 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_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e806b2de9400f1b211ac03466f80bb324cfea44da3c1d913127efd4a407821e8 [2022-12-14 15:57:20,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:57:20,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:57:20,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:57:20,905 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:57:20,905 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:57:20,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 15:57:23,442 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:57:23,615 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:57:23,616 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 15:57:23,622 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/data/cfc243b66/da769736b9124c839fd0a5121ea39144/FLAGbee6d747f [2022-12-14 15:57:24,016 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/data/cfc243b66/da769736b9124c839fd0a5121ea39144 [2022-12-14 15:57:24,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:57:24,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:57:24,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:57:24,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:57:24,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:57:24,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6204aa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24, skipping insertion in model container [2022-12-14 15:57:24,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:57:24,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:57:24,242 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7399,7412] [2022-12-14 15:57:24,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:57:24,281 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:57:24,316 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7399,7412] [2022-12-14 15:57:24,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:57:24,348 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:57:24,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24 WrapperNode [2022-12-14 15:57:24,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:57:24,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:57:24,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:57:24,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:57:24,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,386 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 619 [2022-12-14 15:57:24,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:57:24,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:57:24,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:57:24,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:57:24,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:57:24,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:57:24,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:57:24,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:57:24,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (1/1) ... [2022-12-14 15:57:24,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:57:24,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:24,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:57:24,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:57:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:57:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:57:24,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:57:24,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:57:24,577 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:57:24,578 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:57:24,993 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:57:25,132 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:57:25,132 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 15:57:25,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:57:25 BoogieIcfgContainer [2022-12-14 15:57:25,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:57:25,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:57:25,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:57:25,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:57:25,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:57:24" (1/3) ... [2022-12-14 15:57:25,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c1969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:57:25, skipping insertion in model container [2022-12-14 15:57:25,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:57:24" (2/3) ... [2022-12-14 15:57:25,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c1969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:57:25, skipping insertion in model container [2022-12-14 15:57:25,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:57:25" (3/3) ... [2022-12-14 15:57:25,143 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 15:57:25,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:57:25,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:57:25,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:57:25,216 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;@bd816ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:57:25,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:57:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.688) internal successors, (211), 126 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 15:57:25,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:25,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:25,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:25,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1291372094, now seen corresponding path program 1 times [2022-12-14 15:57:25,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:25,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376424305] [2022-12-14 15:57:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:25,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:25,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376424305] [2022-12-14 15:57:25,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376424305] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:25,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:25,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:57:25,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371006926] [2022-12-14 15:57:25,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:25,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:25,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:25,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:25,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:25,651 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.688) internal successors, (211), 126 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:25,767 INFO L93 Difference]: Finished difference Result 284 states and 446 transitions. [2022-12-14 15:57:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:25,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-14 15:57:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:25,781 INFO L225 Difference]: With dead ends: 284 [2022-12-14 15:57:25,781 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 15:57:25,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:25,788 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 158 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:25,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 407 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:57:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 15:57:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2022-12-14 15:57:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.4093264248704662) internal successors, (272), 193 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 272 transitions. [2022-12-14 15:57:25,849 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 272 transitions. Word has length 58 [2022-12-14 15:57:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:25,850 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 272 transitions. [2022-12-14 15:57:25,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 272 transitions. [2022-12-14 15:57:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 15:57:25,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:25,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:25,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:57:25,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:25,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash 381868271, now seen corresponding path program 1 times [2022-12-14 15:57:25,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:25,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587298834] [2022-12-14 15:57:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:25,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:25,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:25,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587298834] [2022-12-14 15:57:25,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587298834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:25,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:25,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:57:25,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572848399] [2022-12-14 15:57:25,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:25,969 INFO L87 Difference]: Start difference. First operand 194 states and 272 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:26,046 INFO L93 Difference]: Finished difference Result 474 states and 696 transitions. [2022-12-14 15:57:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:26,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 15:57:26,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:26,049 INFO L225 Difference]: With dead ends: 474 [2022-12-14 15:57:26,049 INFO L226 Difference]: Without dead ends: 323 [2022-12-14 15:57:26,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:26,051 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 116 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:26,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 345 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:57:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-12-14 15:57:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2022-12-14 15:57:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.45) internal successors, (464), 320 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 464 transitions. [2022-12-14 15:57:26,095 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 464 transitions. Word has length 61 [2022-12-14 15:57:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:26,096 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 464 transitions. [2022-12-14 15:57:26,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 464 transitions. [2022-12-14 15:57:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 15:57:26,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:26,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:26,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:57:26,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash 40937796, now seen corresponding path program 1 times [2022-12-14 15:57:26,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:26,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980121854] [2022-12-14 15:57:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:26,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:26,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:26,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980121854] [2022-12-14 15:57:26,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980121854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:26,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:26,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:57:26,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711125907] [2022-12-14 15:57:26,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:26,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:26,170 INFO L87 Difference]: Start difference. First operand 321 states and 464 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:26,251 INFO L93 Difference]: Finished difference Result 833 states and 1238 transitions. [2022-12-14 15:57:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:26,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-14 15:57:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:26,254 INFO L225 Difference]: With dead ends: 833 [2022-12-14 15:57:26,254 INFO L226 Difference]: Without dead ends: 555 [2022-12-14 15:57:26,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:26,256 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 111 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:26,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 330 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:57:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-12-14 15:57:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 553. [2022-12-14 15:57:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.4710144927536233) internal successors, (812), 552 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 812 transitions. [2022-12-14 15:57:26,295 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 812 transitions. Word has length 64 [2022-12-14 15:57:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:26,296 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 812 transitions. [2022-12-14 15:57:26,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 812 transitions. [2022-12-14 15:57:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 15:57:26,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:26,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:26,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:57:26,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:26,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash 409037512, now seen corresponding path program 1 times [2022-12-14 15:57:26,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:26,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816916060] [2022-12-14 15:57:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:26,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:26,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:26,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816916060] [2022-12-14 15:57:26,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816916060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:26,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:26,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:57:26,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192741481] [2022-12-14 15:57:26,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:26,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:26,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:26,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:26,381 INFO L87 Difference]: Start difference. First operand 553 states and 812 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:26,516 INFO L93 Difference]: Finished difference Result 1485 states and 2214 transitions. [2022-12-14 15:57:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:26,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-14 15:57:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:26,520 INFO L225 Difference]: With dead ends: 1485 [2022-12-14 15:57:26,520 INFO L226 Difference]: Without dead ends: 975 [2022-12-14 15:57:26,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:26,522 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 106 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:26,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 315 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:57:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-12-14 15:57:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 973. [2022-12-14 15:57:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.477366255144033) internal successors, (1436), 972 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1436 transitions. [2022-12-14 15:57:26,597 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1436 transitions. Word has length 67 [2022-12-14 15:57:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:26,597 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1436 transitions. [2022-12-14 15:57:26,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1436 transitions. [2022-12-14 15:57:26,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 15:57:26,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:26,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:57:26,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1680750051, now seen corresponding path program 1 times [2022-12-14 15:57:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:26,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324527867] [2022-12-14 15:57:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:26,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:26,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324527867] [2022-12-14 15:57:26,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324527867] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:26,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:26,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:57:26,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792813796] [2022-12-14 15:57:26,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:26,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:26,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:26,654 INFO L87 Difference]: Start difference. First operand 973 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:26,818 INFO L93 Difference]: Finished difference Result 2657 states and 3950 transitions. [2022-12-14 15:57:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-12-14 15:57:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:26,822 INFO L225 Difference]: With dead ends: 2657 [2022-12-14 15:57:26,822 INFO L226 Difference]: Without dead ends: 1727 [2022-12-14 15:57:26,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:26,824 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 101 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:26,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:57:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-12-14 15:57:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2022-12-14 15:57:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.4733178654292343) internal successors, (2540), 1724 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2540 transitions. [2022-12-14 15:57:26,941 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2540 transitions. Word has length 70 [2022-12-14 15:57:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:26,941 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2540 transitions. [2022-12-14 15:57:26,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2540 transitions. [2022-12-14 15:57:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 15:57:26,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:26,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:26,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:57:26,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:26,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1203841107, now seen corresponding path program 1 times [2022-12-14 15:57:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:26,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202870571] [2022-12-14 15:57:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:26,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202870571] [2022-12-14 15:57:26,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202870571] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:26,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:26,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:57:26,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788143432] [2022-12-14 15:57:26,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:26,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:57:26,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:26,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:57:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:26,995 INFO L87 Difference]: Start difference. First operand 1725 states and 2540 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:27,219 INFO L93 Difference]: Finished difference Result 4737 states and 6990 transitions. [2022-12-14 15:57:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:57:27,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-12-14 15:57:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:27,226 INFO L225 Difference]: With dead ends: 4737 [2022-12-14 15:57:27,226 INFO L226 Difference]: Without dead ends: 3055 [2022-12-14 15:57:27,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:57:27,229 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 96 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:27,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 285 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:57:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-12-14 15:57:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3053. [2022-12-14 15:57:27,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 1.4613368283093053) internal successors, (4460), 3052 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 4460 transitions. [2022-12-14 15:57:27,444 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 4460 transitions. Word has length 73 [2022-12-14 15:57:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:27,444 INFO L495 AbstractCegarLoop]: Abstraction has 3053 states and 4460 transitions. [2022-12-14 15:57:27,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 4460 transitions. [2022-12-14 15:57:27,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 15:57:27,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:27,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:27,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:57:27,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:27,446 INFO L85 PathProgramCache]: Analyzing trace with hash 349706559, now seen corresponding path program 1 times [2022-12-14 15:57:27,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:27,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985570694] [2022-12-14 15:57:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:27,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:27,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:27,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985570694] [2022-12-14 15:57:27,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985570694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:27,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:27,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:57:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550832782] [2022-12-14 15:57:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:27,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:57:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:57:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:57:27,642 INFO L87 Difference]: Start difference. First operand 3053 states and 4460 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:29,558 INFO L93 Difference]: Finished difference Result 18233 states and 26546 transitions. [2022-12-14 15:57:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:57:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-12-14 15:57:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:29,592 INFO L225 Difference]: With dead ends: 18233 [2022-12-14 15:57:29,592 INFO L226 Difference]: Without dead ends: 15223 [2022-12-14 15:57:29,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:57:29,597 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 600 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:29,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 1109 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:57:29,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15223 states. [2022-12-14 15:57:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15223 to 15213. [2022-12-14 15:57:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15213 states, 15212 states have (on average 1.4522745201156981) internal successors, (22092), 15212 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15213 states to 15213 states and 22092 transitions. [2022-12-14 15:57:31,417 INFO L78 Accepts]: Start accepts. Automaton has 15213 states and 22092 transitions. Word has length 76 [2022-12-14 15:57:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:31,417 INFO L495 AbstractCegarLoop]: Abstraction has 15213 states and 22092 transitions. [2022-12-14 15:57:31,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 15213 states and 22092 transitions. [2022-12-14 15:57:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 15:57:31,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:31,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:31,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:57:31,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:31,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:31,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1702218856, now seen corresponding path program 1 times [2022-12-14 15:57:31,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:31,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278769546] [2022-12-14 15:57:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:31,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:31,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278769546] [2022-12-14 15:57:31,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278769546] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:31,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:31,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:57:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686443453] [2022-12-14 15:57:31,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:57:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:57:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:57:31,486 INFO L87 Difference]: Start difference. First operand 15213 states and 22092 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:34,493 INFO L93 Difference]: Finished difference Result 38947 states and 56768 transitions. [2022-12-14 15:57:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:57:34,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-12-14 15:57:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:34,545 INFO L225 Difference]: With dead ends: 38947 [2022-12-14 15:57:34,545 INFO L226 Difference]: Without dead ends: 23777 [2022-12-14 15:57:34,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:57:34,561 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 678 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:34,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 163 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:57:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23777 states. [2022-12-14 15:57:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23777 to 23775. [2022-12-14 15:57:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23775 states, 23774 states have (on average 1.4455287288634644) internal successors, (34366), 23774 states have internal predecessors, (34366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23775 states to 23775 states and 34366 transitions. [2022-12-14 15:57:37,527 INFO L78 Accepts]: Start accepts. Automaton has 23775 states and 34366 transitions. Word has length 78 [2022-12-14 15:57:37,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:37,527 INFO L495 AbstractCegarLoop]: Abstraction has 23775 states and 34366 transitions. [2022-12-14 15:57:37,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 23775 states and 34366 transitions. [2022-12-14 15:57:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 15:57:37,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:37,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:37,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:57:37,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:37,529 INFO L85 PathProgramCache]: Analyzing trace with hash -742634483, now seen corresponding path program 1 times [2022-12-14 15:57:37,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:37,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11119266] [2022-12-14 15:57:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:37,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:37,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:37,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11119266] [2022-12-14 15:57:37,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11119266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:57:37,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:57:37,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 15:57:37,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693588655] [2022-12-14 15:57:37,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:57:37,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 15:57:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:57:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 15:57:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:57:37,864 INFO L87 Difference]: Start difference. First operand 23775 states and 34366 transitions. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:44,132 INFO L93 Difference]: Finished difference Result 44764 states and 64937 transitions. [2022-12-14 15:57:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:57:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-12-14 15:57:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:44,191 INFO L225 Difference]: With dead ends: 44764 [2022-12-14 15:57:44,191 INFO L226 Difference]: Without dead ends: 44762 [2022-12-14 15:57:44,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-12-14 15:57:44,201 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1715 mSDsluCounter, 3318 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1715 SdHoareTripleChecker+Valid, 3882 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:44,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1715 Valid, 3882 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:57:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44762 states. [2022-12-14 15:57:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44762 to 24335. [2022-12-14 15:57:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24335 states, 24334 states have (on average 1.445960384646996) internal successors, (35186), 24334 states have internal predecessors, (35186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24335 states to 24335 states and 35186 transitions. [2022-12-14 15:57:47,580 INFO L78 Accepts]: Start accepts. Automaton has 24335 states and 35186 transitions. Word has length 78 [2022-12-14 15:57:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:47,580 INFO L495 AbstractCegarLoop]: Abstraction has 24335 states and 35186 transitions. [2022-12-14 15:57:47,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 24335 states and 35186 transitions. [2022-12-14 15:57:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 15:57:47,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:47,582 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:47,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:57:47,583 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:47,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1465333773, now seen corresponding path program 1 times [2022-12-14 15:57:47,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:47,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674442132] [2022-12-14 15:57:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:47,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:48,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:57:48,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674442132] [2022-12-14 15:57:48,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674442132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:57:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573709091] [2022-12-14 15:57:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:48,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:48,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:48,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:57:48,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e44e3ff-330a-40e0-a135-a9811e905074/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:57:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:57:49,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 15:57:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:52,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:59:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573709091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:59:13,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14455374] [2022-12-14 15:59:13,577 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-12-14 15:59:13,578 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:59:13,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:59:13,584 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:59:13,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs