./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur --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 f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d --- 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-38b53e6 [2022-11-25 23:15:22,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:15:22,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:15:22,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:15:22,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:15:22,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:15:22,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:15:22,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:15:22,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:15:22,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:15:22,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:15:22,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:15:22,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:15:22,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:15:22,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:15:22,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:15:22,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:15:22,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:15:22,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:15:22,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:15:22,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:15:22,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:15:22,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:15:22,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:15:22,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:15:22,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:15:22,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:15:22,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:15:22,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:15:22,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:15:22,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:15:22,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:15:22,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:15:22,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:15:22,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:15:22,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:15:22,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:15:22,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:15:22,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:15:22,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:15:22,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:15:22,556 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:15:22,608 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:15:22,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:15:22,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:15:22,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:15:22,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:15:22,611 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:15:22,612 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:15:22,612 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:15:22,613 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:15:22,613 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:15:22,614 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:15:22,615 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:15:22,615 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:15:22,615 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:15:22,616 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:15:22,616 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:15:22,617 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:15:22,617 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:15:22,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:15:22,618 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:15:22,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:15:22,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:15:22,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:15:22,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:15:22,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:15:22,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:15:22,621 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:15:22,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:15:22,622 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:15:22,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:15:22,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:15:22,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:15:22,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:22,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:15:22,625 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:15:22,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:15:22,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:15:22,626 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:15:22,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:15:22,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:15:22,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:15:22,627 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_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91e7b856fd6bf43c568f48d1703ed519fbb708e5c1360b96f8534e6fa4ed35d [2022-11-25 23:15:22,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:15:23,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:15:23,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:15:23,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:15:23,031 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:15:23,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2022-11-25 23:15:26,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:15:26,821 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:15:26,822 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2022-11-25 23:15:26,831 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/data/1041c1db4/134fc43fc41542789b82d263777debf7/FLAG77eb64321 [2022-11-25 23:15:26,848 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/data/1041c1db4/134fc43fc41542789b82d263777debf7 [2022-11-25 23:15:26,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:15:26,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:15:26,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:26,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:15:26,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:15:26,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21098b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:26, skipping insertion in model container [2022-11-25 23:15:26,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:26" (1/1) ... [2022-11-25 23:15:26,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:15:26,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:15:27,109 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_f6189860-f78f-465d-b020-5f46cca3c9ea/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c[2598,2611] [2022-11-25 23:15:27,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:27,133 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:15:27,160 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_f6189860-f78f-465d-b020-5f46cca3c9ea/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c[2598,2611] [2022-11-25 23:15:27,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:27,182 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:15:27,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27 WrapperNode [2022-11-25 23:15:27,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:27,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:27,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:15:27,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:15:27,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,233 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 193 [2022-11-25 23:15:27,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:27,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:15:27,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:15:27,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:15:27,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,271 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:15:27,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:15:27,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:15:27,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:15:27,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (1/1) ... [2022-11-25 23:15:27,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:27,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:27,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:15:27,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:15:27,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:15:27,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:15:27,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:15:27,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:15:27,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:15:27,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:15:27,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:15:27,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:15:27,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 23:15:27,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 23:15:27,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:15:27,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:15:27,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:15:27,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:15:27,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:15:27,365 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:15:27,492 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:15:27,496 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:15:28,136 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:15:28,150 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:15:28,151 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-25 23:15:28,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:28 BoogieIcfgContainer [2022-11-25 23:15:28,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:15:28,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:15:28,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:15:28,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:15:28,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:15:26" (1/3) ... [2022-11-25 23:15:28,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60eb0c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:28, skipping insertion in model container [2022-11-25 23:15:28,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:27" (2/3) ... [2022-11-25 23:15:28,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60eb0c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:28, skipping insertion in model container [2022-11-25 23:15:28,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:28" (3/3) ... [2022-11-25 23:15:28,165 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2022-11-25 23:15:28,181 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 23:15:28,190 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:15:28,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:15:28,190 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:15:28,300 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 23:15:28,344 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:15:28,361 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 279 places, 294 transitions, 612 flow [2022-11-25 23:15:28,365 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 279 places, 294 transitions, 612 flow [2022-11-25 23:15:28,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 294 transitions, 612 flow [2022-11-25 23:15:28,556 INFO L130 PetriNetUnfolder]: 25/291 cut-off events. [2022-11-25 23:15:28,556 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 23:15:28,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 291 events. 25/291 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 174 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 234. Up to 2 conditions per place. [2022-11-25 23:15:28,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2022-11-25 23:15:40,966 INFO L134 LiptonReduction]: Checked pairs total: 4500 [2022-11-25 23:15:40,967 INFO L136 LiptonReduction]: Total number of compositions: 311 [2022-11-25 23:15:40,977 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 40 transitions, 104 flow [2022-11-25 23:15:41,044 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 378 states, 377 states have (on average 3.2546419098143238) internal successors, (1227), 377 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:41,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:15:41,084 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;@6f11aa30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:15:41,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 23:15:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 377 states have (on average 3.2546419098143238) internal successors, (1227), 377 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:15:41,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:41,122 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] [2022-11-25 23:15:41,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash 32060035, now seen corresponding path program 1 times [2022-11-25 23:15:41,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:41,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900176435] [2022-11-25 23:15:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:41,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900176435] [2022-11-25 23:15:41,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900176435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:41,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:41,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:15:41,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604003221] [2022-11-25 23:15:41,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:41,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:15:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:15:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:15:42,038 INFO L87 Difference]: Start difference. First operand has 378 states, 377 states have (on average 3.2546419098143238) internal successors, (1227), 377 states have internal predecessors, (1227), 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, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:42,376 INFO L93 Difference]: Finished difference Result 1132 states and 3681 transitions. [2022-11-25 23:15:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:15:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2022-11-25 23:15:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:42,395 INFO L225 Difference]: With dead ends: 1132 [2022-11-25 23:15:42,395 INFO L226 Difference]: Without dead ends: 382 [2022-11-25 23:15:42,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:15:42,400 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:42,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 18 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:15:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-25 23:15:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-11-25 23:15:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.2309711286089238) internal successors, (1231), 381 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1231 transitions. [2022-11-25 23:15:42,510 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1231 transitions. Word has length 23 [2022-11-25 23:15:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:42,513 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 1231 transitions. [2022-11-25 23:15:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1231 transitions. [2022-11-25 23:15:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:15:42,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:42,517 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] [2022-11-25 23:15:42,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:15:42,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1874178947, now seen corresponding path program 1 times [2022-11-25 23:15:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814637255] [2022-11-25 23:15:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:42,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:42,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:42,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814637255] [2022-11-25 23:15:42,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814637255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468739224] [2022-11-25 23:15:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:42,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:42,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:42,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:42,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:15:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:43,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:15:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:43,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:43,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468739224] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:43,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:15:43,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 12 [2022-11-25 23:15:43,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106618389] [2022-11-25 23:15:43,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:43,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:15:43,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:43,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:15:43,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:15:43,388 INFO L87 Difference]: Start difference. First operand 382 states and 1231 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:43,769 INFO L93 Difference]: Finished difference Result 688 states and 2226 transitions. [2022-11-25 23:15:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:15:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2022-11-25 23:15:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:43,778 INFO L225 Difference]: With dead ends: 688 [2022-11-25 23:15:43,778 INFO L226 Difference]: Without dead ends: 688 [2022-11-25 23:15:43,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:15:43,780 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:43,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 36 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:15:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-25 23:15:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 442. [2022-11-25 23:15:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.197278911564626) internal successors, (1410), 441 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1410 transitions. [2022-11-25 23:15:43,831 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1410 transitions. Word has length 27 [2022-11-25 23:15:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:43,833 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 1410 transitions. [2022-11-25 23:15:43,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1410 transitions. [2022-11-25 23:15:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:15:43,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:43,837 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] [2022-11-25 23:15:43,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:44,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:44,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1196112387, now seen corresponding path program 2 times [2022-11-25 23:15:44,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:44,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210266576] [2022-11-25 23:15:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:44,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:44,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210266576] [2022-11-25 23:15:44,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210266576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614426159] [2022-11-25 23:15:44,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:15:44,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:44,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:44,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:44,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:15:44,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:15:44,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:44,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:15:44,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:15:44,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:15:44,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614426159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:44,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:15:44,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 9 [2022-11-25 23:15:44,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051617164] [2022-11-25 23:15:44,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:44,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:15:44,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:15:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:15:44,619 INFO L87 Difference]: Start difference. First operand 442 states and 1410 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:44,936 INFO L93 Difference]: Finished difference Result 933 states and 2986 transitions. [2022-11-25 23:15:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:15:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2022-11-25 23:15:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:44,944 INFO L225 Difference]: With dead ends: 933 [2022-11-25 23:15:44,944 INFO L226 Difference]: Without dead ends: 918 [2022-11-25 23:15:44,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:15:44,951 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:44,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 41 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:15:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-25 23:15:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 454. [2022-11-25 23:15:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.2560706401766004) internal successors, (1475), 453 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1475 transitions. [2022-11-25 23:15:44,992 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1475 transitions. Word has length 27 [2022-11-25 23:15:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:44,992 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 1475 transitions. [2022-11-25 23:15:44,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1475 transitions. [2022-11-25 23:15:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:15:44,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:44,995 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] [2022-11-25 23:15:45,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:45,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:45,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash -404325467, now seen corresponding path program 3 times [2022-11-25 23:15:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:45,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525412125] [2022-11-25 23:15:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:45,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:45,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525412125] [2022-11-25 23:15:45,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525412125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:45,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209748308] [2022-11-25 23:15:45,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:15:45,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:45,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:45,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:45,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:15:45,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:15:45,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:45,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:15:45,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:45,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:45,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209748308] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:45,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:15:45,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 12 [2022-11-25 23:15:45,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307353601] [2022-11-25 23:15:45,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:45,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:15:45,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:15:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:15:45,860 INFO L87 Difference]: Start difference. First operand 454 states and 1475 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:46,193 INFO L93 Difference]: Finished difference Result 816 states and 2664 transitions. [2022-11-25 23:15:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:15:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2022-11-25 23:15:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:46,201 INFO L225 Difference]: With dead ends: 816 [2022-11-25 23:15:46,201 INFO L226 Difference]: Without dead ends: 816 [2022-11-25 23:15:46,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:15:46,203 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 162 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:46,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 25 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:15:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-11-25 23:15:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 466. [2022-11-25 23:15:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.2344086021505376) internal successors, (1504), 465 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1504 transitions. [2022-11-25 23:15:46,237 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1504 transitions. Word has length 27 [2022-11-25 23:15:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:46,237 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 1504 transitions. [2022-11-25 23:15:46,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1504 transitions. [2022-11-25 23:15:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:15:46,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:46,241 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] [2022-11-25 23:15:46,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:46,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1347568701, now seen corresponding path program 4 times [2022-11-25 23:15:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:46,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684941732] [2022-11-25 23:15:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:46,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:46,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:46,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684941732] [2022-11-25 23:15:46,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684941732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:46,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087269590] [2022-11-25 23:15:46,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:15:46,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:46,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:46,726 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:46,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:15:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:15:46,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:46,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:47,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087269590] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:47,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:15:47,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 11 [2022-11-25 23:15:47,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889075031] [2022-11-25 23:15:47,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:47,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:15:47,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:15:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:15:47,092 INFO L87 Difference]: Start difference. First operand 466 states and 1504 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:47,410 INFO L93 Difference]: Finished difference Result 604 states and 1953 transitions. [2022-11-25 23:15:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:15:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2022-11-25 23:15:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:47,416 INFO L225 Difference]: With dead ends: 604 [2022-11-25 23:15:47,416 INFO L226 Difference]: Without dead ends: 604 [2022-11-25 23:15:47,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:15:47,417 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:47,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 32 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:15:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-11-25 23:15:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 490. [2022-11-25 23:15:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.243353783231084) internal successors, (1586), 489 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1586 transitions. [2022-11-25 23:15:47,448 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1586 transitions. Word has length 27 [2022-11-25 23:15:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:47,448 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 1586 transitions. [2022-11-25 23:15:47,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1586 transitions. [2022-11-25 23:15:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:15:47,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:47,452 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] [2022-11-25 23:15:47,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:47,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:47,659 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1514362847, now seen corresponding path program 5 times [2022-11-25 23:15:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917750851] [2022-11-25 23:15:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:47,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917750851] [2022-11-25 23:15:47,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917750851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953635565] [2022-11-25 23:15:47,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:15:47,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:47,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:47,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:47,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:15:48,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:15:48,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:15:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:15:48,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:15:48,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953635565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:48,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:15:48,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 9 [2022-11-25 23:15:48,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190426858] [2022-11-25 23:15:48,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:48,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:15:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:48,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:15:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:15:48,163 INFO L87 Difference]: Start difference. First operand 490 states and 1586 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:48,440 INFO L93 Difference]: Finished difference Result 945 states and 3065 transitions. [2022-11-25 23:15:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:15:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2022-11-25 23:15:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:48,447 INFO L225 Difference]: With dead ends: 945 [2022-11-25 23:15:48,448 INFO L226 Difference]: Without dead ends: 930 [2022-11-25 23:15:48,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:15:48,449 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:48,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 46 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:15:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-25 23:15:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 502. [2022-11-25 23:15:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.2954091816367264) internal successors, (1651), 501 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1651 transitions. [2022-11-25 23:15:48,477 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1651 transitions. Word has length 27 [2022-11-25 23:15:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:48,477 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 1651 transitions. [2022-11-25 23:15:48,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1651 transitions. [2022-11-25 23:15:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:15:48,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:48,480 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] [2022-11-25 23:15:48,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:48,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:15:48,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:48,687 INFO L85 PathProgramCache]: Analyzing trace with hash 96578111, now seen corresponding path program 6 times [2022-11-25 23:15:48,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:48,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543687685] [2022-11-25 23:15:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:48,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:48,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:48,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543687685] [2022-11-25 23:15:48,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543687685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:48,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362842285] [2022-11-25 23:15:48,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:15:48,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:48,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:48,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:48,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:15:49,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:15:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:15:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:49,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:49,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362842285] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:49,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:15:49,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 12 [2022-11-25 23:15:49,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863891276] [2022-11-25 23:15:49,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:49,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:15:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:15:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:15:49,309 INFO L87 Difference]: Start difference. First operand 502 states and 1651 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:49,597 INFO L93 Difference]: Finished difference Result 694 states and 2252 transitions. [2022-11-25 23:15:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:15:49,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2022-11-25 23:15:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:49,603 INFO L225 Difference]: With dead ends: 694 [2022-11-25 23:15:49,603 INFO L226 Difference]: Without dead ends: 694 [2022-11-25 23:15:49,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:15:49,604 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:49,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 29 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:15:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-25 23:15:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 490. [2022-11-25 23:15:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.243353783231084) internal successors, (1586), 489 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1586 transitions. [2022-11-25 23:15:49,628 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1586 transitions. Word has length 27 [2022-11-25 23:15:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:49,629 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 1586 transitions. [2022-11-25 23:15:49,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:49,629 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1586 transitions. [2022-11-25 23:15:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:15:49,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:49,631 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] [2022-11-25 23:15:49,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:49,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:49,838 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1643017345, now seen corresponding path program 1 times [2022-11-25 23:15:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:49,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987403486] [2022-11-25 23:15:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:15:50,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:50,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987403486] [2022-11-25 23:15:50,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987403486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:50,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333953928] [2022-11-25 23:15:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:50,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:50,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:50,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:50,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:15:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:50,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:15:50,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:15:50,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:15:50,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333953928] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:50,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:15:50,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-25 23:15:50,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527460758] [2022-11-25 23:15:50,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:50,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:15:50,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:15:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:15:50,377 INFO L87 Difference]: Start difference. First operand 490 states and 1586 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:50,479 INFO L93 Difference]: Finished difference Result 570 states and 1856 transitions. [2022-11-25 23:15:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:15:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 30 [2022-11-25 23:15:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:50,484 INFO L225 Difference]: With dead ends: 570 [2022-11-25 23:15:50,484 INFO L226 Difference]: Without dead ends: 570 [2022-11-25 23:15:50,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:15:50,486 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:50,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 13 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-25 23:15:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2022-11-25 23:15:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.2618629173989455) internal successors, (1856), 569 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1856 transitions. [2022-11-25 23:15:50,508 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1856 transitions. Word has length 30 [2022-11-25 23:15:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:50,509 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 1856 transitions. [2022-11-25 23:15:50,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1856 transitions. [2022-11-25 23:15:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 23:15:50,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:50,511 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] [2022-11-25 23:15:50,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:50,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:50,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:15:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash 452268133, now seen corresponding path program 1 times [2022-11-25 23:15:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:50,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755035701] [2022-11-25 23:15:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:54,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:54,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755035701] [2022-11-25 23:15:54,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755035701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:54,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940938073] [2022-11-25 23:15:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:54,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:54,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:54,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:54,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6189860-f78f-465d-b020-5f46cca3c9ea/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:15:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-25 23:15:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:54,589 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 23:15:54,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 23:15:54,694 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:15:54,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 23:15:54,798 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-25 23:15:54,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:15:54,940 INFO L321 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2022-11-25 23:15:54,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 25 [2022-11-25 23:15:56,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 36 [2022-11-25 23:15:56,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:15:56,920 INFO L321 Elim1Store]: treesize reduction 44, result has 47.0 percent of original size [2022-11-25 23:15:56,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-11-25 23:15:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:15:57,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:16:53,665 INFO L321 Elim1Store]: treesize reduction 122, result has 71.1 percent of original size [2022-11-25 23:16:53,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 3854 treesize of output 2041 [2022-11-25 23:16:53,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:16:53,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2250 treesize of output 2126 [2022-11-25 23:16:53,961 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 23:16:53,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 37 [2022-11-25 23:16:56,211 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 23:16:56,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:16:56,627 INFO L321 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2022-11-25 23:16:56,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 118 [2022-11-25 23:16:57,509 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 23:16:57,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45