./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.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_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/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_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/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_88a08df1-6384-4cac-9c1f-0d88052dd67f/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 86aaf7922fe6f7f87277fe3baca1629811408ccdafec5bb956830ba2f5ff28a9 --- 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 09:12:00,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:12:00,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:12:00,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:12:00,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:12:00,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:12:00,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:12:00,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:12:00,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:12:00,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:12:00,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:12:00,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:12:00,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:12:00,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:12:00,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:12:00,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:12:00,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:12:00,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:12:00,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:12:00,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:12:00,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:12:00,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:12:00,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:12:00,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:12:00,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:12:00,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:12:00,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:12:00,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:12:00,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:12:00,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:12:00,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:12:00,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:12:00,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:12:00,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:12:00,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:12:00,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:12:00,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:12:00,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:12:00,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:12:00,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:12:00,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:12:00,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:12:00,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:12:00,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:12:00,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:12:00,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:12:00,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:12:00,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:12:00,743 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:12:00,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:12:00,743 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:12:00,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:12:00,743 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:12:00,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:12:00,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:12:00,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:12:00,744 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:12:00,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:12:00,744 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:12:00,744 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:12:00,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:12:00,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:12:00,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:12:00,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:12:00,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:12:00,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:12:00,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:12:00,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:12:00,746 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:12:00,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:12:00,746 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:12:00,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:12:00,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:12:00,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:12:00,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:12:00,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:12:00,747 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:12:00,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:12:00,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:12:00,748 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:12:00,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:12:00,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:12:00,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:12:00,748 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_88a08df1-6384-4cac-9c1f-0d88052dd67f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86aaf7922fe6f7f87277fe3baca1629811408ccdafec5bb956830ba2f5ff28a9 [2022-12-14 09:12:00,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:12:00,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:12:00,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:12:00,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:12:00,966 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:12:00,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2022-12-14 09:12:03,569 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:12:03,743 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:12:03,744 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2022-12-14 09:12:03,752 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/data/731b588d2/c8af83b2623244aba51d77f0eed49f77/FLAG8748392d9 [2022-12-14 09:12:03,762 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/data/731b588d2/c8af83b2623244aba51d77f0eed49f77 [2022-12-14 09:12:03,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:12:03,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:12:03,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:12:03,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:12:03,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:12:03,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:12:03" (1/1) ... [2022-12-14 09:12:03,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f94d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:03, skipping insertion in model container [2022-12-14 09:12:03,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:12:03" (1/1) ... [2022-12-14 09:12:03,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:12:03,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:12:04,043 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_88a08df1-6384-4cac-9c1f-0d88052dd67f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c[28194,28207] [2022-12-14 09:12:04,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:12:04,059 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:12:04,132 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_88a08df1-6384-4cac-9c1f-0d88052dd67f/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c[28194,28207] [2022-12-14 09:12:04,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:12:04,148 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:12:04,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04 WrapperNode [2022-12-14 09:12:04,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:12:04,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:12:04,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:12:04,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:12:04,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,205 INFO L138 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 903 [2022-12-14 09:12:04,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:12:04,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:12:04,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:12:04,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:12:04,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,236 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:12:04,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:12:04,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:12:04,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:12:04,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (1/1) ... [2022-12-14 09:12:04,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:12:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:12:04,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:12:04,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:12:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:12:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:12:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:12:04,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:12:04,391 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:12:04,392 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:12:05,108 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:12:05,671 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:12:05,671 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:12:05,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:12:05 BoogieIcfgContainer [2022-12-14 09:12:05,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:12:05,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:12:05,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:12:05,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:12:05,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:12:03" (1/3) ... [2022-12-14 09:12:05,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671fd4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:12:05, skipping insertion in model container [2022-12-14 09:12:05,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:12:04" (2/3) ... [2022-12-14 09:12:05,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671fd4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:12:05, skipping insertion in model container [2022-12-14 09:12:05,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:12:05" (3/3) ... [2022-12-14 09:12:05,679 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2022-12-14 09:12:05,693 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:12:05,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:12:05,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:12:05,735 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;@6b4e77af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:12:05,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:12:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 09:12:05,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:05,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:05,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash 167986854, now seen corresponding path program 1 times [2022-12-14 09:12:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:05,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21918453] [2022-12-14 09:12:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:07,813 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 09:12:07,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21918453] [2022-12-14 09:12:07,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21918453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:07,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:07,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:12:07,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282005128] [2022-12-14 09:12:07,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:07,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:12:07,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:12:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:07,842 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:08,036 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2022-12-14 09:12:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:12:08,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 09:12:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:08,046 INFO L225 Difference]: With dead ends: 180 [2022-12-14 09:12:08,047 INFO L226 Difference]: Without dead ends: 158 [2022-12-14 09:12:08,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:08,051 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 29 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:08,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 372 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:12:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-12-14 09:12:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2022-12-14 09:12:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2022-12-14 09:12:08,084 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2022-12-14 09:12:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:08,085 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2022-12-14 09:12:08,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2022-12-14 09:12:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 09:12:08,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:08,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:12:08,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 844479129, now seen corresponding path program 1 times [2022-12-14 09:12:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:08,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294796491] [2022-12-14 09:12:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:08,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:09,280 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 09:12:09,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:09,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294796491] [2022-12-14 09:12:09,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294796491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:09,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:09,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:12:09,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748261199] [2022-12-14 09:12:09,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:09,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:12:09,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:12:09,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:09,283 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:09,406 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2022-12-14 09:12:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:12:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 09:12:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:09,407 INFO L225 Difference]: With dead ends: 180 [2022-12-14 09:12:09,407 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 09:12:09,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:09,408 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:09,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 385 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:12:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 09:12:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-12-14 09:12:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2022-12-14 09:12:09,416 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2022-12-14 09:12:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:09,417 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2022-12-14 09:12:09,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2022-12-14 09:12:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 09:12:09,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:09,418 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] [2022-12-14 09:12:09,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:12:09,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash 346354927, now seen corresponding path program 1 times [2022-12-14 09:12:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:09,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227657971] [2022-12-14 09:12:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:09,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:10,613 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 09:12:10,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:10,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227657971] [2022-12-14 09:12:10,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227657971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:10,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:10,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:12:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682828752] [2022-12-14 09:12:10,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:10,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:12:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:12:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:10,616 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:10,769 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2022-12-14 09:12:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:12:10,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 09:12:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:10,771 INFO L225 Difference]: With dead ends: 180 [2022-12-14 09:12:10,771 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 09:12:10,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:10,773 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:10,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:12:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 09:12:10,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-12-14 09:12:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2022-12-14 09:12:10,783 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2022-12-14 09:12:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:10,784 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2022-12-14 09:12:10,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2022-12-14 09:12:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 09:12:10,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:10,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:10,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:12:10,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2089825602, now seen corresponding path program 1 times [2022-12-14 09:12:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:10,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182749698] [2022-12-14 09:12:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:10,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:11,869 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 09:12:11,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:11,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182749698] [2022-12-14 09:12:11,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182749698] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:11,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:11,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:12:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626628671] [2022-12-14 09:12:11,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:11,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:12:11,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:12:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:11,872 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:11,984 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2022-12-14 09:12:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:12:11,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 09:12:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:11,986 INFO L225 Difference]: With dead ends: 180 [2022-12-14 09:12:11,986 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 09:12:11,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:11,988 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:11,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:12:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 09:12:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-12-14 09:12:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2022-12-14 09:12:11,998 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2022-12-14 09:12:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:11,998 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2022-12-14 09:12:11,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2022-12-14 09:12:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 09:12:12,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:12,000 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 09:12:12,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:12:12,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:12,001 INFO L85 PathProgramCache]: Analyzing trace with hash 308293432, now seen corresponding path program 1 times [2022-12-14 09:12:12,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:12,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637374599] [2022-12-14 09:12:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:12,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:12,978 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 09:12:12,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637374599] [2022-12-14 09:12:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637374599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:12,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:12,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:12:12,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528661774] [2022-12-14 09:12:12,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:12,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:12:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:12:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:12,981 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:13,099 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2022-12-14 09:12:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:12:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-14 09:12:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:13,100 INFO L225 Difference]: With dead ends: 180 [2022-12-14 09:12:13,100 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 09:12:13,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:13,102 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:13,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:12:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 09:12:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-12-14 09:12:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2022-12-14 09:12:13,110 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2022-12-14 09:12:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:13,111 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2022-12-14 09:12:13,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2022-12-14 09:12:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 09:12:13,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:13,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:12:13,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1558216288, now seen corresponding path program 1 times [2022-12-14 09:12:13,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:13,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72706492] [2022-12-14 09:12:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:14,525 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 09:12:14,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:14,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72706492] [2022-12-14 09:12:14,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72706492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:14,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:14,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:12:14,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787776223] [2022-12-14 09:12:14,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:14,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:12:14,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:12:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:14,528 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:14,675 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2022-12-14 09:12:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:12:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-12-14 09:12:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:14,676 INFO L225 Difference]: With dead ends: 178 [2022-12-14 09:12:14,676 INFO L226 Difference]: Without dead ends: 158 [2022-12-14 09:12:14,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:14,677 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:14,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 544 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:12:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-12-14 09:12:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2022-12-14 09:12:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2022-12-14 09:12:14,682 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2022-12-14 09:12:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:14,683 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2022-12-14 09:12:14,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2022-12-14 09:12:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:12:14,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:14,684 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 09:12:14,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:12:14,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:14,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1148051527, now seen corresponding path program 1 times [2022-12-14 09:12:14,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:14,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303423122] [2022-12-14 09:12:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:14,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:15,603 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 09:12:15,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:15,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303423122] [2022-12-14 09:12:15,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303423122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:15,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:15,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:12:15,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910841015] [2022-12-14 09:12:15,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:15,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:12:15,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:15,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:12:15,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:15,606 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:15,683 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2022-12-14 09:12:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:12:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 09:12:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:15,685 INFO L225 Difference]: With dead ends: 179 [2022-12-14 09:12:15,685 INFO L226 Difference]: Without dead ends: 159 [2022-12-14 09:12:15,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:15,686 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:15,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:12:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-14 09:12:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2022-12-14 09:12:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2022-12-14 09:12:15,694 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2022-12-14 09:12:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:15,694 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2022-12-14 09:12:15,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2022-12-14 09:12:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 09:12:15,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:15,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:15,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:12:15,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:15,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2040951839, now seen corresponding path program 1 times [2022-12-14 09:12:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:15,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897967484] [2022-12-14 09:12:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:15,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:16,841 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 09:12:16,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:16,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897967484] [2022-12-14 09:12:16,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897967484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:16,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:16,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:12:16,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033054422] [2022-12-14 09:12:16,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:16,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:12:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:12:16,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:16,844 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:16,944 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2022-12-14 09:12:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:12:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-14 09:12:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:16,945 INFO L225 Difference]: With dead ends: 179 [2022-12-14 09:12:16,945 INFO L226 Difference]: Without dead ends: 159 [2022-12-14 09:12:16,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:12:16,946 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:16,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:12:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-14 09:12:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2022-12-14 09:12:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2022-12-14 09:12:16,953 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2022-12-14 09:12:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:16,954 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2022-12-14 09:12:16,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2022-12-14 09:12:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 09:12:16,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:16,955 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 09:12:16,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:12:16,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:16,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1165324149, now seen corresponding path program 1 times [2022-12-14 09:12:16,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:16,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746194010] [2022-12-14 09:12:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:16,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:17,914 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 09:12:17,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:17,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746194010] [2022-12-14 09:12:17,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746194010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:17,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:17,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:12:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664608003] [2022-12-14 09:12:17,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:12:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:12:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:12:17,916 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:18,082 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2022-12-14 09:12:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:12:18,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-14 09:12:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:18,084 INFO L225 Difference]: With dead ends: 201 [2022-12-14 09:12:18,084 INFO L226 Difference]: Without dead ends: 181 [2022-12-14 09:12:18,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:12:18,085 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 45 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:18,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 776 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:12:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-14 09:12:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2022-12-14 09:12:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2022-12-14 09:12:18,091 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2022-12-14 09:12:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:18,091 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2022-12-14 09:12:18,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2022-12-14 09:12:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 09:12:18,091 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:18,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:18,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:12:18,092 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1680174357, now seen corresponding path program 1 times [2022-12-14 09:12:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:18,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802395424] [2022-12-14 09:12:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:12:21,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:21,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802395424] [2022-12-14 09:12:21,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802395424] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:12:21,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653462443] [2022-12-14 09:12:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:21,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:12:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:12:21,107 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:12:21,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a08df1-6384-4cac-9c1f-0d88052dd67f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:12:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:21,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:12:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:13:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:00,655 INFO L328 TraceCheckSpWp]: Computing backward predicates...